WeMos D1 mini Relay

Projects Programming
1

Hi I'm trying to controll my lights via a WeMos D1 mini with a relay via a http link.
I got that to work but now I want to turn the ligts on if they're off and off if the're on via the same url.
But now i can only turn them off and no longer on.

This is the code:

#include <ESP8266WiFi.h>

const char* ssid = "xxxxxxxx";
const char* password = "xxxxxxxxx";

int RelayPin = D1;
WiFiServer server(80);
IPAddress ip(192, 168, 0, 97); // where xx is the desired IP Address
IPAddress gateway(192, 168, 0, 1); // set gateway to match your network

void setup() {
WiFi.mode(WIFI_STA);
Serial.begin(115200);
delay(10);

pinMode(RelayPin, OUTPUT);
digitalWrite(RelayPin, HIGH );

Serial.print(F("Setting static ip to : "));
Serial.println(ip);

// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
IPAddress subnet(255, 255, 255, 0); // set subnet mask to match your network
WiFi.config(ip, gateway, subnet);
WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");

// Start the server
server.begin();
Serial.println("Server started");

// Print the IP address
Serial.print("Use this URL : ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");

}

void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}

// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}

// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();

// Match the request

int value = HIGH;
if (request.indexOf("/GO") != -1) {
if (RelayPin != LOW)
{
digitalWrite(RelayPin, LOW);
}
else
{
digitalWrite(RelayPin, HIGH);
}

}

}

2 
if (digitalRead(RelayPin))
3 
  Serial.println(request);

What does this actually print?

    if (RelayPin != LOW)

Well, you declared RelayPin to have the value of D1, and you never change it, so, unless D1 is LOW, then this will always be true. So, it's lights out...

4

The web server class has an HTTP parser built-in, and you can just add handlers to certain URIs, for example:

#include <ESP8266WebServer.h>

ESP8266WebServer server(80);  // Create a webserver object that listens for HTTP request on port 80

void setup() {
  server.on("/GO", go);  // Execute function 'go()' every time a client requests the "/GO" URI
}
void loop() {
  server.handleClient();  // Listen for HTTP requests from clients, and execute 'go()' if "/GO" is requested
}
void go() {
  bool relayState = digitalRead(RelayPin);  // Read the pin's state, not the pin number
  digitalWrite(RelayPin, ! relayState);  // Invert the state using the not operator (!) and write this to the output
}

Find a complete example here:
https://tttapa.github.io/ESP8266/Chap10 - Simple Web Server.html

Pieter

5

thanks it works now but how do I close this quesion now?

6

svnmstrs:
thanks it works now but how do I close this quesion now?

You can't close anything. You can edit the title. to include SOLVED and most people will stop responding.