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restored original code

edited Jan 28, 2020 at 19:11

 //HUMIDITY CONTROLLER 1.1
//written for NANO
 
 //controls and displays relative humidity
 //sesnor used is DHT11
 //uses active-low relay module to control live lines for 2 standard electrical outlets
 //uses i2c lcd to display humidity and humidity setting
 //turns display off during inactivity
 //setting is adjustable from 10%-90% using 2 buttons
 //backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
 //serial communications to monitor to ensure all code is working.
 
 //added: "system off" function - allows both outlets to be turned off
 
 // █ G █ L █ O █ B █ A █ L █ S █
 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>
 #include <DHT.h>
 
 // set the LCD address to 0x27 for a 16 chars and 2 line display
 LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT//controls DHT_sens(10and displays relative humidity
//sesnor used is DHT11
//uses active-low relay module to control live lines for 2 standard electrical outlets
//uses i2c lcd to display humidity and humidity setting
//turns display off during inactivity
//setting is adjustable from 10%-90% using 2 buttons
//backlight of LCD is controlled by pin 4, DHT22);connected to top LED jumper pin on i2c backpack
//serial communications to monitor to ensure all code is working.
#define//added: DHT22_PIN"system A2off" function - allows both outlets to be turned off
 
 //buttons and variables to adjust calibration
 int calupbtn = A0;
 int calup;
 int caldownbtn = A1;
 int caldown;
 
 //i2c PINS A4, A5
 
 //pin for turning on humidifier relay
 int humidifier = 3;
 //pin for turning on the fan relay
 int fan = 2;
 //pin for turning on LCD backlights
 int lcdlight = 4;
 
 //calibration variable
 int setpoint = 50; //feedback setpoint. 
 bool calstate = false; //enables calibration adjustments only when LCD is ON.
 
 //backlight timing variables
 int displtime = 12000; //amount of time the display is to be on before turning off
 unsigned long displtimeon; //last recorded time display timer was reset
 int calunlock = 0; //loop counter for unlocking calibration 
 
 //sensor timing variables
 unsigned long lastcheck; //last time DHT was read
 long interval = 30000; //time between DHT readings
 
 //system variables
 bool syson = true; //reference for system on/off. 
 byte systog = 2; //even number toggles on, odds toggle off
 int syslock = 0; //loop counter for unlocking system toggle
 
 // █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
 void setup(){
 
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 
 displtimeon = millis();
 
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 }
 
 // █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
 void loop(){
 
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
// █ G █ L █ O █ B █ A █ L █ S █
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht.h>
// set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2); 
dht DHT;
#define DHT11_PIN A2
//buttons and variables to adjust calibration
int calupbtn = A0;
int calup;
int caldownbtn = A1;
int caldown;
//i2c PINS A4, A5
//pin for turning on humidifier relay
int humidifier = 3;
//pin for turning on the fan relay
int fan = 2;
//pin for turning on LCD backlights
int lcdlight = 4;
//calibration variable
int setpoint = 50; //feedback setpoint. 
bool calstate = false; //enables calibration adjustments only when LCD is ON.
//backlight timing variables
int displtime = 12000; //amount of time the display is to be on before turning off
unsigned long displtimeon; //last recorded time display timer was reset
int calunlock = 0; //loop counter for unlocking calibration 
//sensor timing variables
unsigned long lastcheck; //last time DHT was read
long interval = 30000; //time between DHT readings
//system variables
bool syson = true; //reference for system on/off. 
byte systog = 2; //even number toggles on, odds toggle off
int syslock = 0; //loop counter for unlocking system toggle
// █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
void setup(){
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 displtimeon = millis();
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
}
// █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
void loop(){
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" "SYSTEM SYSTEMTURNED OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display");
 //display variables on LCD
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
 
 //--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 delay(100); 
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
 calstate = false;
 Serial.println("displ + backlights off");
 lcd.clear();
 calunlock =lcd.print(" 0; //lockSYSTEM calibrationOFF");
 } lcd.setCursor(0,1);
 lcd.print("  hold both btns");
 if(millis delay(2000);
 < lastcheck lcd.setCursor(0,1){;
 lastchecklcd.print(" = millis(to turn on "); //reset timers in a millisecond rollover displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SETPOINT ERRORSYSTEM PROCEDUREON
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever outsyson of= boundstrue;
 Serial.println("O/B"SYSTEM ERROR"TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
 " SYSTEM lcd.print("RESETTING"ON");
 delay(1000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,12000);
 lcd.print(count); //count down from 10
 delayclear(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
  if(DHT.humiditymillis() >=> setpointlastcheck + 3interval and syson == true){ //ifread the DHT humidity is 3% above setpointint chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.printlnprint("humidifier"DHT OFF,read fan= ON"");
 Serial.print(DHT.humidity);
 digitalWriteSerial.print(humidifier,"%");
 HIGH Serial.println(" ");
 }
 //turn on fanthe led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
  digitalWrite(fanlcdlight, LOWHIGH);
 calstate = }true;
 displtimeon = elsemillis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("all"printing off"display"); //ifdisplay variables on LCD
  lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 is within 3% oflcd.setCursor(15,0);
 setpoint lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 digitalWritelcd.setCursor(humidifier13,1);
 HIGH lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 calunlock ++; 
  //turnkeeps bothcalibration offlocked until display cycles 5 times after initially turned on
 //prevents adjustments on initial digitalWritebutton press.
 }
//--------CALIBRATION ADJUSTMENTS
 if(fan,calup == HIGH and caldown == LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 //delay(700100); 
 displtimeon = millis(); //un-commentreset forbacklight serialtimeout
 debugging }

 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
  calstate = false;
 Serial.printprintln("setpoint"displ + backlights off");
 lcd.clear();
 calunlock = "0; //lock calibration
 }
 if(millis() < lastcheck){
 lastcheck = millis(); //reset timers in a millisecond rollover
 }

 //--------SETPOINT ERROR PROCEDURE
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println(setpoint"O/B ERROR");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
 lcd.print("RESETTING");
 delay(7001000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1); lcd.print(count); //un-commentcount fordown serialfrom debugging10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW);
 }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
 }
 //delay(700); //un-comment for serial debugging
 Serial.print("setpoint = ");
 Serial.println(setpoint);
 //delay(700); //un-comment for serial debugging
}
/* WIRING DIAGRAMS
 https://66.media.tumblr.com/98426b566744beacdd42bc0221092b76/tumblr_pvr0u8kvZy1yrmjh9o1_1280.png
 */

 //HUMIDITY CONTROLLER 1.1
//written for NANO
 
 //controls and displays relative humidity
 //sesnor used is DHT11
 //uses active-low relay module to control live lines for 2 standard electrical outlets
 //uses i2c lcd to display humidity and humidity setting
 //turns display off during inactivity
 //setting is adjustable from 10%-90% using 2 buttons
 //backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
 //serial communications to monitor to ensure all code is working.
 
 //added: "system off" function - allows both outlets to be turned off
 
 // █ G █ L █ O █ B █ A █ L █ S █
 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>
 #include <DHT.h>
 
 // set the LCD address to 0x27 for a 16 chars and 2 line display
 LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT DHT_sens(10, DHT22); 
#define DHT22_PIN A2
 
 //buttons and variables to adjust calibration
 int calupbtn = A0;
 int calup;
 int caldownbtn = A1;
 int caldown;
 
 //i2c PINS A4, A5
 
 //pin for turning on humidifier relay
 int humidifier = 3;
 //pin for turning on the fan relay
 int fan = 2;
 //pin for turning on LCD backlights
 int lcdlight = 4;
 
 //calibration variable
 int setpoint = 50; //feedback setpoint. 
 bool calstate = false; //enables calibration adjustments only when LCD is ON.
 
 //backlight timing variables
 int displtime = 12000; //amount of time the display is to be on before turning off
 unsigned long displtimeon; //last recorded time display timer was reset
 int calunlock = 0; //loop counter for unlocking calibration 
 
 //sensor timing variables
 unsigned long lastcheck; //last time DHT was read
 long interval = 30000; //time between DHT readings
 
 //system variables
 bool syson = true; //reference for system on/off. 
 byte systog = 2; //even number toggles on, odds toggle off
 int syslock = 0; //loop counter for unlocking system toggle
 
 // █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
 void setup(){
 
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 
 displtimeon = millis();
 
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 }
 
 // █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
 void loop(){
 
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("  SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display");
 //display variables on LCD
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
 
 //--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 delay(100); 
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
 calstate = false;
 Serial.println("displ + backlights off");
 lcd.clear();
 calunlock = 0; //lock calibration
 }
 
 if(millis() < lastcheck){
 lastcheck = millis(); //reset timers in a millisecond rollover
 }
 //--------SETPOINT ERROR PROCEDURE
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println("O/B ERROR");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
  lcd.print("RESETTING");
 delay(1000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1);
 lcd.print(count); //count down from 10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW);
 }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
 }
 //delay(700); //un-comment for serial debugging
 
 Serial.print("setpoint = ");
 Serial.println(setpoint);
 
 //delay(700); //un-comment for serial debugging
 }

 //HUMIDITY CONTROLLER 1.1
//written for NANO
//controls and displays relative humidity
//sesnor used is DHT11
//uses active-low relay module to control live lines for 2 standard electrical outlets
//uses i2c lcd to display humidity and humidity setting
//turns display off during inactivity
//setting is adjustable from 10%-90% using 2 buttons
//backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
//serial communications to monitor to ensure all code is working.
//added: "system off" function - allows both outlets to be turned off
// █ G █ L █ O █ B █ A █ L █ S █
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht.h>
// set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2); 
dht DHT;
#define DHT11_PIN A2
//buttons and variables to adjust calibration
int calupbtn = A0;
int calup;
int caldownbtn = A1;
int caldown;
//i2c PINS A4, A5
//pin for turning on humidifier relay
int humidifier = 3;
//pin for turning on the fan relay
int fan = 2;
//pin for turning on LCD backlights
int lcdlight = 4;
//calibration variable
int setpoint = 50; //feedback setpoint. 
bool calstate = false; //enables calibration adjustments only when LCD is ON.
//backlight timing variables
int displtime = 12000; //amount of time the display is to be on before turning off
unsigned long displtimeon; //last recorded time display timer was reset
int calunlock = 0; //loop counter for unlocking calibration 
//sensor timing variables
unsigned long lastcheck; //last time DHT was read
long interval = 30000; //time between DHT readings
//system variables
bool syson = true; //reference for system on/off. 
byte systog = 2; //even number toggles on, odds toggle off
int syslock = 0; //loop counter for unlocking system toggle
// █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
void setup(){
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 displtimeon = millis();
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
}
// █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
void loop(){
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
  lcd.setCursor(0,1);
 lcd.print("  hold both btns");
  delay(2000);
  lcd.setCursor(0,1);
 lcd.print(" to turn on ");  displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
  if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
  Serial.println(" ");
 }
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
  digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display"); //display variables on LCD
  lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
  lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
  lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 calunlock ++; 
  //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
//--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 delay(100); 
 displtimeon = millis(); //reset backlight timeout
  }

 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
  calstate = false;
 Serial.println("displ + backlights off");
 lcd.clear();
 calunlock = 0; //lock calibration
 }
 if(millis() < lastcheck){
 lastcheck = millis(); //reset timers in a millisecond rollover
 }

 //--------SETPOINT ERROR PROCEDURE
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println("O/B ERROR");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
 lcd.print("RESETTING");
 delay(1000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1); lcd.print(count); //count down from 10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW);
 }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
 }
 //delay(700); //un-comment for serial debugging
 Serial.print("setpoint = ");
 Serial.println(setpoint);
 //delay(700); //un-comment for serial debugging
}
/* WIRING DIAGRAMS
 https://66.media.tumblr.com/98426b566744beacdd42bc0221092b76/tumblr_pvr0u8kvZy1yrmjh9o1_1280.png
 */

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Source Link

edit approved Jan 24, 2020 at 22:55

Thomas Weller

edit approved Jan 24, 2020 at 22:55

Thomas Weller

1.1k
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This is NOT my code; was posted on Project Hubposted on Project Hub. I tried to use the code (humidity controller) but it returns an error on line 270:

This is NOT my code; was posted on Project Hub. I tried to use the code (humidity controller) but it returns an error on line 270:

added 1 character in body

Source Link

edited Jan 24, 2020 at 19:03

kwhunter

edited Jan 24, 2020 at 19:03

kwhunter

//HUMIDITY CONTROLLER 1.1
//written for NANO

//controls and displays relative humidity
//sesnor used is DHT11
//uses active-low relay module to control live lines for 2 standard electrical outlets
//uses i2c lcd to display humidity and humidity setting
//turns display off during inactivity
//setting is adjustable from 10%-90% using 2 buttons
//backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
//serial communications to monitor to ensure all code is working.

//added: "system off" function - allows both outlets to be turned off

// █ G █ L █ O █ B █ A █ L █ S █
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht<Wire.h>
// set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2); 
dht DHT;
#define DHT11_PIN A2
//buttons and variables to adjust calibration
int calupbtn = A0;
int calup;
int caldownbtn = A1;
int caldown;
//i2c PINS A4, A5
//pin for turning on humidifier relay
int humidifier = 3;
//pin for turning on the fan relay
int fan = 2;
//pin for turning on LCD backlights
int lcdlight = 4;
//calibration#include variable<LiquidCrystal_I2C.h>
int setpoint = 50;  //feedback#include setpoint<DHT.h>
bool calstate = false; //enables calibration adjustments only when LCD is ON.
//backlight timing variables
int displtime = 12000;  //amount of timeset the displayLCD isaddress to be on before turning off
unsigned long displtimeon; //last recorded time display timer was reset
int calunlock = 0; //loop counter for unlocking calibration 
//sensor timing variables
unsigned long lastcheck; //last time DHT was read
long interval = 30000; //time between DHT readings
//system variables
bool syson = true; //reference for system on/off. 
byte systog = 2; //even number toggles on, odds toggle off
int syslock = 0; //loop counter0x27 for unlocking system toggle
// █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
void setup(){
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 displtimeon = millis();
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
a 16 lcd.print("%chars and ");
2 line lcd.setCursor(0,1);display
 lcd.print("setting: ");
 LiquidCrystal_I2C lcd.setCursor(130x27,1);
  lcd.print(setpoint);
 lcd.setCursor(1516,1);
 lcd.print("% ");
  delay(1002);
}
// █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
voidDHT loopDHT_sens(10, DHT22){; 
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown#define =DHT22_PIN digitalRead(caldownbtn);A2
 
 //buttons and variables to adjust calibration
 int calupbtn = A0;
 int calup;
 int caldownbtn = A1;
 int caldown;
 
 //i2c PINS A4, A5
 
 //pin for turning on humidifier relay
 int humidifier = 3;
 //pin for turning on the fan relay
 int fan = 2;
 //pin for turning on LCD backlights
 int lcdlight = 4;
 
 //calibration variable
 int setpoint = 50; //feedback setpoint. 
 bool calstate = false; //enables calibration adjustments only when LCD is ON.
 
 //backlight timing variables
 int displtime = 12000; //amount of time the display is to be on before turning off
 unsigned long displtimeon; //last recorded time display timer was reset
 int calunlock = 0; //loop counter for unlocking calibration 
 
 //sensor timing variables
 unsigned long lastcheck; //last time DHT was read
 long interval = 30000; //time between DHT readings
 
 //system variables
 bool syson = true; //reference for system on/off. 
 byte systog = 2; //even number toggles on, odds toggle off
 int syslock = 0; //loop counter for unlocking system toggle
 
 // █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
 void setup(){
 
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 
 displtimeon = millis();
 
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 }
 
 // █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
 void loop(){
 
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("SYSTEM"cal TURNEDbtn OFF"ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(20003000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display");
 //display variables on LCD
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 to turn on "lcd.setCursor(13,1);
 displtimeonlcd.print(setpoint);
 = millis lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
 //--------CALIBRATION ADJUSTMENTS
 if(systogcalup %== 2HIGH and caldown == 0LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ setpoint = setpoint + 5; //--------SYSTEMincrease ONsetpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = true;setpoint - 5; //decrease setpoint
 Serial.println("SYSTEM"adj TURNEDsetpoint ON"dn");
 }
 Serial.println(setpoint);
 delay(100); 
 displtimeon = millis(); //reset backlight timeout
 }
  
 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, HIGHLOW); //turn off the screen
 calstate = false;
 Serial.println("displ + backlights off");
 lcd.clear();
 lcd.printcalunlock = 0; //lock calibration
 }
 
 if("millis() < lastcheck){
 SYSTEM ON" lastcheck = millis(); //reset timers in a millisecond rollover
 }
 delay 
 //--------SETPOINT ERROR PROCEDURE
 if(2000setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println("O/B ERROR");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
 lcd.print("RESETTING");
 delay(1000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1);
 lcd.print(count); //count down from 10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
humidifier relay if(calstate == true and syson ==below true){setpoint //--------DISPLAYRELAY ROUTINECONTROL
 Serial.println("printing display");
  //display variables on LCD
 lcd.setCursor(0,0);
 RELAY MODULE IS lcd.print("Humidity:ACTIVE ");LOW
 lcd.setCursor(13,0);
  lcd.printif(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("%  ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 <= lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
//--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true3 and syson == true){ if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
 if humidity is 3% lower Serial.println("adjthan setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 "humidifier displtimeonON, =fan millis(OFF"); //reset backlight timeout
 }
 if(caldown == HIGH and calup ==digitalWrite(humidifier, LOW and calstate == true and syson == true){
 if(setpoint > 10; and calunlock//turn >on 5){humidifier
 setpoint = setpoint - 5; //decrease setpoint
 Serial.printlndigitalWrite("adj setpointfan, dn"HIGH);
 }
 Serial.println(setpoint);
 delay(100); 
  displtimeon =else millisif(); //reset backlight timeout
DHT.humidity >= }
setpoint + if(millis()3 >and displtimeonsyson +== displtimetrue){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight,if LOW);humidity //turnis off3% theabove screensetpoint
 calstate = false;
  Serial.println("displ"humidifier +OFF, backlightsfan off"ON");
 lcd.clear();
 calunlock =digitalWrite(humidifier, 0;HIGH); //lock calibration
turn on }
fan
 if(millis() < lastcheck){
 lastcheck = millisdigitalWrite(fan, LOW); //reset timers in a millisecond rollover
 }
 else{
 //--------SETPOINT ERROR PROCEDURE
 ifSerial.println(setpoint > 91 or setpoint <"all 9off"){; //in caseif setpointhumidity is everwithin out3% of boundssetpoint
 Serial.println("O/B ERROR");
 digitalWrite(lcdlighthumidifier, HIGH); //turn both lcd.clear();off
 lcd.print("O/B ERROR"); //display error message on lcd
  lcd.setCursordigitalWrite(0fan,1 HIGH);
 lcd.print("RESETTING"); }
 //delay(1000700); //un-comment for(int count = 9; count >=serial 0;debugging
 count = count - 1){
 lcdSerial.setCursorprint(15,1"setpoint = ");
 lcdSerial.printprintln(countsetpoint); //count down from 10
 //delay(1000700); //un-comment for serial debugging
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW);
 }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
 }
 //delay(700); //un-comment for serial debugging
 Serial.print("setpoint = ");
 Serial.println(setpoint);
 //delay(700); //un-comment for serial debugging
}

//HUMIDITY CONTROLLER 1.1
//written for NANO
//controls and displays relative humidity
//sesnor used is DHT11
//uses active-low relay module to control live lines for 2 standard electrical outlets
//uses i2c lcd to display humidity and humidity setting
//turns display off during inactivity
//setting is adjustable from 10%-90% using 2 buttons
//backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
//serial communications to monitor to ensure all code is working.
//added: "system off" function - allows both outlets to be turned off
// █ G █ L █ O █ B █ A █ L █ S █
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <dht.h>
// set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2); 
dht DHT;
#define DHT11_PIN A2
//buttons and variables to adjust calibration
int calupbtn = A0;
int calup;
int caldownbtn = A1;
int caldown;
//i2c PINS A4, A5
//pin for turning on humidifier relay
int humidifier = 3;
//pin for turning on the fan relay
int fan = 2;
//pin for turning on LCD backlights
int lcdlight = 4;
//calibration variable
int setpoint = 50;  //feedback setpoint.
bool calstate = false; //enables calibration adjustments only when LCD is ON.
//backlight timing variables
int displtime = 12000;  //amount of time the display is to be on before turning off
unsigned long displtimeon; //last recorded time display timer was reset
int calunlock = 0; //loop counter for unlocking calibration 
//sensor timing variables
unsigned long lastcheck; //last time DHT was read
long interval = 30000; //time between DHT readings
//system variables
bool syson = true; //reference for system on/off. 
byte systog = 2; //even number toggles on, odds toggle off
int syslock = 0; //loop counter for unlocking system toggle
// █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
void setup(){
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 displtimeon = millis();
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
  lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
  delay(100);
}
// █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
void loop(){
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display");
  //display variables on LCD
 lcd.setCursor(0,0);
  lcd.print("Humidity: ");
 lcd.setCursor(13,0);
  lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("%  ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
  lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
//--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true and syson == true){ if(setpoint < 90 and calunlock > 5){ 
 setpoint = setpoint + 5; //increase setpoint 
  Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
  displtimeon = millis(); //reset backlight timeout
 }
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 delay(100); 
  displtimeon = millis(); //reset backlight timeout
 }
 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
 calstate = false;
  Serial.println("displ + backlights off");
 lcd.clear();
 calunlock = 0; //lock calibration
 }

 if(millis() < lastcheck){
 lastcheck = millis(); //reset timers in a millisecond rollover
 }
 //--------SETPOINT ERROR PROCEDURE
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println("O/B ERROR");
 digitalWrite(lcdlight, HIGH); lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
  lcd.setCursor(0,1);
 lcd.print("RESETTING");
 delay(1000); for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1);
 lcd.print(count); //count down from 10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW);
 }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
 }
 //delay(700); //un-comment for serial debugging
 Serial.print("setpoint = ");
 Serial.println(setpoint);
 //delay(700); //un-comment for serial debugging
}

//HUMIDITY CONTROLLER 1.1
//written for NANO

//controls and displays relative humidity
//sesnor used is DHT11
//uses active-low relay module to control live lines for 2 standard electrical outlets
//uses i2c lcd to display humidity and humidity setting
//turns display off during inactivity
//setting is adjustable from 10%-90% using 2 buttons
//backlight of LCD is controlled by pin 4, connected to top LED jumper pin on i2c backpack
//serial communications to monitor to ensure all code is working.

//added: "system off" function - allows both outlets to be turned off

// █ G █ L █ O █ B █ A █ L █ S █
 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>
 #include <DHT.h>
 
 // set the LCD address to 0x27 for a 16 chars and 2 line display
 LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT DHT_sens(10, DHT22); 
#define DHT22_PIN A2
 
 //buttons and variables to adjust calibration
 int calupbtn = A0;
 int calup;
 int caldownbtn = A1;
 int caldown;
 
 //i2c PINS A4, A5
 
 //pin for turning on humidifier relay
 int humidifier = 3;
 //pin for turning on the fan relay
 int fan = 2;
 //pin for turning on LCD backlights
 int lcdlight = 4;
 
 //calibration variable
 int setpoint = 50; //feedback setpoint. 
 bool calstate = false; //enables calibration adjustments only when LCD is ON.
 
 //backlight timing variables
 int displtime = 12000; //amount of time the display is to be on before turning off
 unsigned long displtimeon; //last recorded time display timer was reset
 int calunlock = 0; //loop counter for unlocking calibration 
 
 //sensor timing variables
 unsigned long lastcheck; //last time DHT was read
 long interval = 30000; //time between DHT readings
 
 //system variables
 bool syson = true; //reference for system on/off. 
 byte systog = 2; //even number toggles on, odds toggle off
 int syslock = 0; //loop counter for unlocking system toggle
 
 // █ S █ E █ T █ U █ P █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █ + █
 void setup(){
 
 Serial.begin(9600); //serial communication used to ensure code is working correctly.
 
 lcd.init(); //initialize LCD
 lcd.backlight(); //enable LCD backlight, but doesn't turn it on
 
 lastcheck = 0;
 digitalWrite(lcdlight, HIGH);
 Serial.println("STARTING");
 lcd.print(" STARTING");
 
 //pin assignments
 pinMode(calupbtn, INPUT);
 pinMode(caldownbtn, INPUT);
 pinMode(humidifier, OUTPUT);
 pinMode(fan, OUTPUT);
 pinMode(lcdlight, OUTPUT);
 delay(1000);
 
 
 //test fan
 lcd.setCursor(0,1);
 lcd.print("<FAN> HMDFR "); 
 digitalWrite(fan, LOW);
 digitalWrite(humidifier, HIGH);
 delay(6000);
 //test humidifier
 lcd.setCursor(0,1);
 lcd.print(" FAN <HMDFR> ");
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, LOW);
 delay(6000);
 //stop startup test
 digitalWrite(humidifier, HIGH);
 digitalWrite(fan, HIGH);
 lcd.clear();
 
 displtimeon = millis();
 
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
 lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 }
 
 // █ L █ O █ O █ P █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █ = █
 void loop(){
 
 //check calibration buttons
 calup = digitalRead(calupbtn);
 caldown = digitalRead(caldownbtn);
 
 if(calup == HIGH and caldown == HIGH){ //--------SYSTEM TOGGLE
 syslock ++;
 Serial.println(syslock);
 if(syslock == 20){ //if both buttons held down for this many loops
 systog++;
 if(systog % 2 == 1){ //--------SYSTEM OFF
 syson = false;
 digitalWrite(fan, HIGH);
 digitalWrite(humidifier, HIGH);
 digitalWrite(lcdlight, HIGH);
 Serial.println("SYSTEM TURNED OFF");
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(2000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 if(systog % 2 == 0){ //--------SYSTEM ON
 syson = true;
 Serial.println("SYSTEM TURNED ON");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM ON");
 delay(2000);
 lcd.clear();
 displtimeon = millis();
 }
 syslock = 0;
 }
 }
 else(syslock = 0);
 
 //read humidity at appropriate intervals
 if(millis() > lastcheck + interval and syson == true){ //read the DHT humidity
 int chk = DHT.read11(DHT11_PIN);
 lastcheck = millis();
 Serial.print("DHT read = ");
 Serial.print(DHT.humidity);
 Serial.print("%");
 Serial.println(" ");
 }
 
 //turn on the led lights when calibration buttons are pressed
 if(calup == HIGH xor caldown == HIGH){
 digitalWrite(lcdlight, HIGH);
 calstate = true;
 displtimeon = millis(); //set display timer
 Serial.println("cal btn ACTIVE");
 if(syson == false){
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print(" SYSTEM OFF");
 lcd.setCursor(0,1);
 lcd.print(" hold both btns");
 delay(3000);
 lcd.setCursor(0,1);
 lcd.print(" to turn on ");
 displtimeon = millis();
 }
 }
 
 if(calstate == true and syson == true){ //--------DISPLAY ROUTINE
 Serial.println("printing display");
 //display variables on LCD
 lcd.setCursor(0,0);
 lcd.print("Humidity: ");
 lcd.setCursor(13,0);
 lcd.print(DHT.humidity);
 lcd.setCursor(15,0);
 lcd.print("% ");
 lcd.setCursor(0,1);
 lcd.print("setting: ");
 lcd.setCursor(13,1);
 lcd.print(setpoint);
  lcd.setCursor(15,1);
 lcd.print("% ");
 delay(100);
 
 calunlock ++; 
 //keeps calibration locked until display cycles 5 times after initially turned on
 //prevents adjustments on initial button press.
 }
 //--------CALIBRATION ADJUSTMENTS
 if(calup == HIGH and caldown == LOW and calstate == true and syson == true){ 
 if(setpoint < 90 and calunlock > 5){ setpoint = setpoint + 5; //increase setpoint 
 Serial.println("adj setpoint up");
 }
 Serial.println(setpoint);
 delay(100);
 displtimeon = millis(); //reset backlight timeout
 }
 
 if(caldown == HIGH and calup == LOW and calstate == true and syson == true){
 if(setpoint > 10 and calunlock > 5){
 setpoint = setpoint - 5; //decrease setpoint
 Serial.println("adj setpoint dn");
 }
 Serial.println(setpoint);
 delay(100); 
 displtimeon = millis(); //reset backlight timeout
 }
  
 if(millis() > displtimeon + displtime){ //-----------------BACKLIGHT TIMEOUT
 digitalWrite(lcdlight, LOW); //turn off the screen
 calstate = false;
 Serial.println("displ + backlights off");
 lcd.clear();
 calunlock = 0; //lock calibration
 }
 
 if(millis() < lastcheck){
  lastcheck = millis(); //reset timers in a millisecond rollover
 }
  
 //--------SETPOINT ERROR PROCEDURE
 if(setpoint > 91 or setpoint < 9){ //in case setpoint is ever out of bounds
 Serial.println("O/B ERROR");
 digitalWrite(lcdlight, HIGH);
 lcd.clear();
 lcd.print("O/B ERROR"); //display error message on lcd
 lcd.setCursor(0,1);
 lcd.print("RESETTING");
 delay(1000);
 for(int count = 9; count >= 0; count = count - 1){
 lcd.setCursor(15,1);
 lcd.print(count); //count down from 10
 delay(1000);
 }
 setpoint = 50; //reset setpoint at 50.
 displtimeon = millis();
 }
 
 //turn on humidifier relay if below setpoint --------RELAY CONTROL
 //RELAY MODULE IS ACTIVE LOW
 if(DHT.humidity <= setpoint - 3 and syson == true){ //if humidity is 3% lower than setpoint
 Serial.println("humidifier ON, fan OFF"); 
 digitalWrite(humidifier, LOW); //turn on humidifier
 digitalWrite(fan, HIGH);
 }
 else if(DHT.humidity >= setpoint + 3 and syson == true){ //if humidity is 3% above setpoint
 Serial.println("humidifier OFF, fan ON");
 digitalWrite(humidifier, HIGH); //turn on fan
 digitalWrite(fan, LOW); }
 else{
 Serial.println("all off"); //if humidity is within 3% of setpoint
 digitalWrite(humidifier, HIGH); //turn both off
 digitalWrite(fan, HIGH);
  }
 //delay(700); //un-comment for serial debugging
 
 Serial.print("setpoint = ");
 Serial.println(setpoint); 
 //delay(700); //un-comment for serial debugging
 }

added 5 characters in body

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edited Jan 23, 2020 at 22:05

kwhunter

edited Jan 23, 2020 at 22:05

kwhunter

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asked Jan 23, 2020 at 20:38

kwhunter

asked Jan 23, 2020 at 20:38

kwhunter