this probably simple thing to do however I can't think of a way to pass argument to function call
ESP8266WebServer server ( 80 );
void toggleRelayOne() {
char temp[400];
String msg = "";
if (relay1 == 0) {
relay1 = 1;
msg = "Light is turned on";
}
else {
relay1 = 0;
msg = "Light is turned off";
}
digitalWrite (5, relay1); //GPIO 5 // Relay 1
snprintf ( temp, 400,
"<html>\
<head>\
<meta http-equiv='refresh' content='5'/>\
<title>NodeMCU DHT11 Sensor and Relay Board</title>\
<meta http-equiv='refresh' content='0; url=../'>\
</head>\
<body>\
%d .</body>\
</html>"
, 1);
server.send ( 200, "text/html", temp );
}
void setup ( void ) {
pinMode(10, OUTPUT);
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
Serial.begin ( 9600 );
WiFi.begin ( ssid, password );
Serial.println ( "" );
// Wait for connection
while ( WiFi.status() != WL_CONNECTED ) {
delay ( 500 );
Serial.print ( "." );
}
Serial.println ( "" );
Serial.print ( "Connected to " );
Serial.println ( ssid );
Serial.print ( "IP address: " );
Serial.println ( WiFi.localIP() );
if ( MDNS.begin ( host ) ) {
Serial.println ( "MDNS responder started" );
}
MDNS.addService("http", "tcp", 80);
server.on ( "/", handleRoot );
server.on("/relay1", toggleRelayOne);
server.begin();
Serial.println ( "HTTP server started" );
}
in the above function where I am calling toggleRelayOne using server.on("/relay1", toggleRelayOne); I want to be able to pass relay id so I can use same function to toggle multiple relays.
asked Mar 26, 2017 at 16:42
1 Answer 1
Use server.arg() to pass commands from the web as GET params:
digitalWrite (5, relay1);
becomes
digitalWrite (server.arg("pin").toInt(), relay1);
where the URL is something like http://192.168.1.5/relay1?pin=15
Of course, the rest of your code probably needs to be adapted to manage the extra states, read/write all in one http call, etc.
answered Mar 27, 2017 at 8:11
default
"/"I call a functionhandleRoot. This function reads the data from sensors connected to ESP826.