D1 Mini switching multiple relays via webpage
Posted: Sun May 06, 2018 6:18 amHi there, I'm new to Arduino and programming so please bear with me. I found a great example how to employ my D1 Mini to toggle a relay via a webpage on my local network. This is the code that works for me:
I used this in conjunction with 1 relay and it works fine. I now want to use it with multiple relays so I made some changes in the code to add a second one, however, I must have missed something as the link to switch the second relay on or off still switches the first relay, see code:
I'd appreciate it if someone could point out to me what I need to add or change to make this work.
Thanks in advance!
Code: Select all
//This example will use a static IP to control the switching of a relay. Over LAN using a web browser.
//A lot of this code have been resued from the example on the ESP8266 Learning Webpage below.
//http://www.esp8266learning.com/wemos-webserver-example.php
//CODE START
//1
#include <ESP8266WiFi.h>
// Below you will need to use your own WIFI informaiton.
//2
const char* ssid = "myssid"; //WIFI Name, WeMo will only connect to a 2.4GHz network.
const char* password = "mypassword"; //WIFI Password
//defining the pin and setting up the "server"
//3
int relayPin = D1; // The Shield uses pin 1 for the relay
WiFiServer server(80);
IPAddress ip(192, 168, 178, 77); // where xx is the desired IP Address
IPAddress gateway(192, 168, 178, 1); // set gateway to match your network
IPAddress subnet(255, 255, 255, 0); // set subnet mask to match your network
// void setup is where we initialize variables, pin modes, start using libraries, etc.
//The setup function will only run once, after each powerup or reset of the wemos board.
//4
void setup() {
Serial.begin(115200);
delay(10);
pinMode(relayPin, OUTPUT);
digitalWrite(relayPin, LOW);
Serial.print(F("Setting static ip to : "));
Serial.println(ip);
// Connect to WiFi network
//5
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.config(ip, gateway, subnet);
WiFi.begin(ssid, password);
//Trying to connect it will display dots
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 is where you put all your code. it is a function that returns nothing and will repeat over and over again
//6
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, checking to see what the currect state is
int value = LOW;
if (request.indexOf("/relay=ON") != -1) {
digitalWrite(relayPin, HIGH);
value = HIGH;
}
if (request.indexOf("/relay=OFF") != -1){
digitalWrite(relayPin, LOW);
value = LOW;
}
// Return the response, build the html page
//7
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Relay is now: ");
if(value == HIGH) {
client.print("Engaged (ON)");
} else {
client.print("Disengaged (OFF)");
}
client.println("<br><br><br>");
client.println("<a href=\"/relay=ON\">Click here to engage (Turn ON) the relay.</a> <br><br><br>");
client.println("<a href=\"/relay=OFF\">Click here to disengage (Turn OFF) the relay.</a><br>");
client.println("</html>");
delay(1);
Serial.println("Client disconnected");
Serial.println("");
}//END
I used this in conjunction with 1 relay and it works fine. I now want to use it with multiple relays so I made some changes in the code to add a second one, however, I must have missed something as the link to switch the second relay on or off still switches the first relay, see code:
Code: Select all
//This example will use a static IP to control the switching of a relay. Over LAN using a web browser.
//A lot of this code have been resued from the example on the ESP8266 Learning Webpage below.
//http://www.esp8266learning.com/wemos-webserver-example.php
//CODE START
//1
#include <ESP8266WiFi.h>
// Below you will need to use your own WIFI informaiton.
//2
const char* ssid = "myssid"; //WIFI Name, WeMo will only connect to a 2.4GHz network.
const char* password = "mypassword"; //WIFI Password
//defining the pin and setting up the "server"
//3
int relayPin1 = D1; // The Shield uses pin 1 for relay 1
int relayPin2 = D2; // The Shield uses pin 2 for relay 2
WiFiServer server(80);
IPAddress ip(192, 168, 178, 77); // where xx is the desired IP Address
IPAddress gateway(192, 168, 178, 1); // set gateway to match your network
IPAddress subnet(255, 255, 255, 0); // set subnet mask to match your network
// void setup is where we initialize variables, pin modes, start using libraries, etc.
//The setup function will only run once, after each powerup or reset of the wemos board.
//4
void setup() {
Serial.begin(115200);
delay(10);
pinMode(relayPin1, OUTPUT);
digitalWrite(relayPin1, LOW);
pinMode(relayPin2, OUTPUT);
digitalWrite(relayPin2, LOW);
Serial.print(F("Setting static ip to : "));
Serial.println(ip);
// Connect to WiFi network
//5
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.config(ip, gateway, subnet);
WiFi.begin(ssid, password);
//Trying to connect it will display dots
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 is where you put all your code. it is a function that returns nothing and will repeat over and over again
//6
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 1st request
String request1 = client.readStringUntil('\r');
Serial.println(request1);
client.flush();
//Match the 1st request, checking to see what the currect state is
int value1 = LOW;
if (request1.indexOf("/relay=ON") != -1) {
digitalWrite(relayPin1, HIGH);
value1 = HIGH;
}
if (request1.indexOf("/relay=OFF") != -1){
digitalWrite(relayPin1, LOW);
value1 = LOW;
}
// Read the first line of the 2nd request
String request2 = client.readStringUntil('\r');
Serial.println(request2);
client.flush();
//Match the 1st request, checking to see what the currect state is
int value2 = LOW;
if (request2.indexOf("/relay=ON") != -1) {
digitalWrite(relayPin2, HIGH);
value2 = HIGH;
}
if (request2.indexOf("/relay=OFF") != -1){
digitalWrite(relayPin2, LOW);
value2 = LOW;
}
// Return the response, build the html page
//7
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Relay 1 is now: ");
if(value1 == HIGH) {
client.print("Engaged (ON)");
} else {
client.print("Disengaged (OFF)");
}
client.println("<br><br><br>");
client.println("<a href=\"/relay=ON\">Click here to engage (Turn ON) relay 1.</a> <br><br><br>");
client.println("<a href=\"/relay=OFF\">Click here to disengage (Turn OFF) relay 1.</a><br>");
client.println("<br><br><br>");
client.print("Relay 2 is now: ");
if(value2 == HIGH) {
client.print("Engaged (ON)");
} else {
client.print("Disengaged (OFF)");
}
client.println("<br><br><br>");
client.println("<a href=\"/relay=ON\">Click here to engage (Turn ON) relay 2.</a> <br><br><br>");
client.println("<a href=\"/relay=OFF\">Click here to disengage (Turn OFF) relay 2.</a><br>");
client.println("<br><br><br>");
client.println("</html>");
delay(1);
Serial.println("Client disconnected");
Serial.println("");
}//END
I'd appreciate it if someone could point out to me what I need to add or change to make this work.
Thanks in advance!