Arduino + WizFi 210 (WiFi) HTTP POST

Question

I would like to do an HTTP POST to Carriots. I saw a few tutorials.

Both of them are using ethernet instead of WiFi. I realize the ways of using Arduino WiFi shield and WizFi Shield are a bit different. What do I need to do to run a basic server using the WizFi Shield?

Code:

/******************************************************************
 WizFiShield Web Client Test Example
*****************************************************************/
// WizFiShield communicates using SPI, so include the SPI library:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SPI.h>
#include <WizFi2x0.h>
#include <WizFiClient.h>
#include <TimerOne.h>
#define SSID "EricLeong3" // SSID of your AP
#define Key "ericChoong91" // Key or Passphrase
// Wi-Fi security option (NO_SECURITY, WEP_SECURITY, WPA_SECURITY, WPA2PSK_SECURITY)
#define Security WPA2PSK_SECURITY
#define APIKEY "xxxxxxxxx" // Replace with your Carriots apikey
#define DEVICE "[email protected]"
WizFi2x0Class myWizFi;
WizFiClient myClient;
TimeoutClass ConnectInterval;
boolean Wifi_setup = false;
///////////////////////////////
// 1msec Timer
void Timer1_ISR() {
 myWizFi.ReplyCheckTimer.CheckIsTimeout();
}
//
//////////////////////////////
void setup() {
 byte retval;
 Serial.begin(9600);
 Serial.println("\r\nSerial Init");
 // initalize WizFi2x0 module:
 myWizFi.begin();
 ConnectInterval.init();
 // Socket Creation with Server IP address and Server Port num 
 myClient = WizFiClient("82,223,244,60", 80);
 // Timer1 Initialize
 Timer1.initialize(1000); // 1msec
 Timer1.attachInterrupt(Timer1_ISR);
 myWizFi.SendSync();
 myWizFi.ReplyCheckTimer.TimerStart(3000);
 Serial.println("Send Sync data");
 while(1) {
 if(myWizFi.CheckSyncReply()) {
 myWizFi.ReplyCheckTimer.TimerStop();
 Serial.println("Rcvd Sync data");
 break;
 }
 if(myWizFi.ReplyCheckTimer.GetIsTimeout()) {
 Serial.println("Rcving Sync Timeout!!");
 // Nothing to do forever;
 for(;;)
 ;
 }
 }
 ////////////////////////////////////////////////////////////////////////////
 // AP association 
 while(1) {
 retval = myWizFi.associate(SSID, Key, Security, true);
 if(retval == 1) {
 Serial.println("AP association Success");
 Wifi_setup = true;
 break;
 } else {
 Serial.println("AP association Failed");
 }
 }
}
void loop() {
 Serial.println("apleleee ");
 uint8_t retval;
 retval = myClient.connect();
 if(retval == 1) {
 String json = "{\"protocol\":\"v2\",\"device\":\""+String(DEVICE)+"\",\"at\":\"now\",\"data\":{\"Air Temperature\":\"58\",\"Humidity\":\"59\"}}";
 Serial.println("Connected! ");
 //myClient.write((byte *)"GET /search?q=WizFi210 HTTP/1.0\r\n\r\n");
 myClient.write((byte *)"POST /streams HTTP/1.1");
 myClient.write((byte *)"Host: api.carriots.com");
 myClient.write((byte *)"Accept: application/json");
 myClient.write((byte *)"User-Agent: Arduino-Carriots");
 myClient.write((byte *)"Content-Type: application/json");
 myClient.write((byte *)"carriots.apikey: ");
 myClient.write((byte *)APIKEY);
 myClient.write((byte *)"Content-Length: ");
 byte thisLength = json.length();
 myClient.write(thisLength);
 myClient.write((byte *)"Connection: close");
 myClient.write((byte *)"");
 myClient.write((byte *)"{\"protocol\":\"v2\",\"device\":\"");
 myClient.write((byte *)DEVICE);
 myClient.write((byte *)"\",\"at\":\"now\",\"data\":{\"Air Temperature\":");
 myClient.write((byte *)"58");
 myClient.write((byte *)",\"Humidity\":");
 myClient.write((byte *)"59");
 myClient.write((byte *)"}}");
 } else
 Serial.println("Connection Failed");
 }

The response I get on the serial monitor

Serial Init
Send Sync data
Rcvd Sync data
AT
Rcvd Reply: [ERROR]
[ERROR]
Timeout with ERROR reply
AP association Failed
AT
Rcvd Reply: õAT
õAT
-1
Rcvd Reply: [ERROR: INVALID INPUT]
[ERROR
INVALID
INPUT]
-1
Rcvd Reply: AT
AT
-1
Rcvd Reply: [OK]
[OK]
ATE0
Rcvd Reply: ATE0
ATE0
-1
Rcvd Reply: [OK]
[OK]
AT+XDUM=0
Rcvd Reply: [OK]
[OK]
AT+BDATA=1
Rcvd Reply: [OK]
[OK]
AT+WD
Rcvd Reply: [OK]
[OK]
AT+WM=0
Rcvd Reply: [OK]
[OK]
AT+WPAPSK=EricLeong3,ericChoong91
Rcvd Reply: Computing PSK from SSID and PassPhrase...
Computing
PSK
from
SSID
and
PassPhrase...
-1
Rcvd Reply: [OK]
[OK]
AT+NDHCP=1
Rcvd Reply: [OK]
[OK]
AT+WA=EricLeong3
Rcvd Reply: IP SubNet Gateway 
 IP SubNet Gateway 
IP
SubNet
Gateway
Rcvd Reply: 192.168.1.42: 255.255.255.0: 192.168.1.1
 192.168.1.42: 255.255.255.0: 192.168.1.1
192.168.1.42
192.168.1.42
255.255.255.0
255.255.255.0
192.168.1.1
192.168.1.1
Rcvd Reply: [OK]
[OK]
AP association Success
apleleee 
AT+DNSLOOKUP=82,223,244,60,3,5
Rcvd Reply: [ERROR: INVALID INPUT]
Token: [ERROR

May I know what's wrong with the code? Why does it show a token error instead of success? What I am trying to do is posting an HTTP POST request to Carriots, which is a place to do my m2m things. I am still wondering which part I am missing. I referred to few sources such as

http://forum.carriots.com/index.php/topic/61-wireless-gardening-with-arduino-cc3000-wifi-modules/page-2

https://github.com/Wiznet/WizFiShield

• Peter Bloomfield: Welcome to Arduino SE. I'm sorry we can't provide general tutorials here. Is there a specific issue you're struggling with?
• Eric Leong Zhia Choong: @PeterR.Bloomfield I had edit the question.hopefully i can get some help here
• Anonymous Penguin: What he meant was asking for a tutorial somewhere is generally not accepted since we strive to be the information, not a collection of links. I edited your question to narrow it down a bit...

Answer 1

The library provides an example for a server.

Here's what it looks like:

/******************************************************************
 WizFiShield Web Server Test Example
 A simple web server that shows "Hello World" string 
 Circuit:
 WizFi2x0 connected to Arduino via SPI
 RST: pin 2 // Output
 DRDY: pin 3 // Input
 CSB: pin 4 // output
 MOSI: pin 11 // output
 MISO: pin 12 // input
 SCK: pin 13 // out
 Created 27 Sep. 2012
 by James YS Kim ([email protected], [email protected])
 Modified 27 May. 2013
 by Jinbuhm Kim ([email protected], [email protected])
*****************************************************************/
// WizFi210 communicates using SPI, so include the SPI library:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SPI.h>
#include <WizFi2x0.h>
#include <WizFiClient.h>
#include <WizFiServer.h>
#include <TimerOne.h>
#define SSID "" // SSID of your AP
#define Key "" // Key or Passphrase
// Wi-Fi security option (NO_SECURITY, WEP_SECURITY, WPA_SECURITY, WPA2PSK_SECURITY)
//#define Security WPA_SECURITY
#define MAX_SOCK_NUM 4
unsigned int SrcPort = 80;
WizFi2x0Class myWizFi;
WizFiClient myClient[MAX_SOCK_NUM];//(SIP, ServerPort);
WizFiServer myServer(SrcPort);
boolean Wifi_setup = false;
///////////////////////////////
// 1msec Timer
void Timer1_ISR()
{
 myWizFi.ReplyCheckTimer.CheckIsTimeout();
}
//
//////////////////////////////
void setup() {
 byte retval, i;
 Serial.begin(9600);
 Serial.println("\r\nSerial Init");
 for(i=0; i<MAX_SOCK_NUM; i++)
 myClient[i] = WizFiClient();
 myWizFi.begin();
 // Timer1 Initialize
 Timer1.initialize(1000); // 1msec
 Timer1.attachInterrupt(Timer1_ISR);
 myWizFi.SendSync();
 myWizFi.ReplyCheckTimer.TimerStart(3000);
 Serial.println("Send Sync data");
 while(1)
 {
 if(myWizFi.CheckSyncReply())
 {
 myWizFi.ReplyCheckTimer.TimerStop();
 Serial.println("Rcvd Sync data");
 break;
 }
 if(myWizFi.ReplyCheckTimer.GetIsTimeout())
 {
 Serial.println("Rcving Sync Timeout!!");
 return;
 }
 }
 ////////////////////////////////////////////////////////////////////////////
 // AP association 
 while(1)
 {
 byte tmpstr[32];
 retval = myWizFi.associate(SSID, Key, Security, true);
 if(retval == 1){
 myWizFi.GetSrcIPAddr(tmpstr);
 Serial.println("WizFi2xo AP Associated");
 Serial.print("MY IPAddress: ");
 Serial.println((char *)tmpstr);
 Wifi_setup = true;
 break;
 }else{
 Serial.println("AP association Failed");
 }
 }
 if(myServer.begin())
 Serial.println("Server Listen OK");
 else
 Serial.println("Server Listen Failed");
}
void loop()
{
 uint8_t retval, i;
 byte rcvdBuf[129];
 memset(rcvdBuf, 0, 129);
 if(Wifi_setup)
 { 
 myWizFi.RcvPacket();
 for(i=0; i<MAX_SOCK_NUM; i++)
 {
 if(myClient[i].available()){ 
 retval = myClient[i].read(rcvdBuf); 
 if(retval > 0)
 {
 Serial.print("CID[");
 Serial.print((char)myClient[i].GetCID());
 Serial.print("]");
 Serial.println((char *)rcvdBuf);
 if((rcvdBuf[retval - 1] == 0x0A) && (rcvdBuf[retval - 2] == 0x0D) && (rcvdBuf[retval - 3] == 0x0A) && (rcvdBuf[retval - 4] == 0x0D))
 {
 Serial.print("Receiving Completed");
 myClient[i].write((byte *)"HTTP/1.1 200 OK\r\n");
 myClient[i].write((byte *)"Content-Type: text/html\r\n");
 myClient[i].write((byte *)"\r\n");
 myClient[i].write((byte *)"Hello World !\r\n");
 delay(100);
 myClient[i].disconnect();
 }
 }
 }
 }
 }
}

Using the WizFiServer class, it seems to assign a WizFiClient instance to each HTTP socket connection. It can then call clientName.write( /* Data to be sent to client */ ); and clientName.read(); to get values.

Once it is done with the client, it can free up resources by calling clientName.disconnect();.