Thanks to superhouse
for this code
It was designed for Sonoff but I tested it on NodeMcu Lua
ESP8266 ESP-12E
- note the pinouts listed in this sketch/*
| /* * Simple example MQTT client to run on the Itead Studio Sonoff with OTA * update support. Subscribes to a topic and watches for a message of * either "0" (turn off LED and relay) or "1" (turn on LED and relay) * * For more information see: * http://www.superhouse.tv/17-home-automation-control-with-sonoff-arduino-openhab-and-mqtt/ */ #include <ESP8266WiFi.h> #include <ESP8266mDNS.h> #include <WiFiUdp.h> #include <ArduinoOTA.h> #include <PubSubClient.h> /* WiFi Settings */ const char* ssid = "myssid"; const char* password = "mypassword"; /* Sonoff Outputs */ const int relayPin = 4; // Active high NodeMCU pin D2 const int ledPin = 13; // Active low NodeMCU pin D7 /* MQTT Settings */ const char* mqttTopic = "/test/sonoff"; // MQTT topic IPAddress broker(10,1,1,190); // Address of the MQTT broker #define CLIENT_ID "relayclient" // Client ID to send to the broker /** * MQTT callback to process messages */ void callback(char* topic, byte* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); for (int i=0;i<length;i++) { Serial.print((char)payload[i]); } Serial.println(); // Examine only the first character of the message if(payload[0] == 49) // Message "1" in ASCII (turn outputs ON) { digitalWrite(ledPin, LOW); // LED is active-low, so this turns it on digitalWrite(relayPin, HIGH); } else if(payload[0] == 48) // Message "0" in ASCII (turn outputs OFF) { digitalWrite(ledPin, HIGH); // LED is active-low, so this turns it off digitalWrite(relayPin, LOW); } else { Serial.println("Unknown value"); } } WiFiClient wificlient; PubSubClient client(wificlient); /** * Attempt connection to MQTT broker and subscribe to command topic */ void reconnect() { // Loop until we're reconnected while (!client.connected()) { Serial.print("Attempting MQTT connection..."); // Attempt to connect if (client.connect(CLIENT_ID)) { Serial.println("connected"); client.subscribe(mqttTopic); } else { Serial.print("failed, rc="); Serial.print(client.state()); Serial.println(" try again in 5 seconds"); // Wait 5 seconds before retrying delay(5000); } } } /** * Setup */ void setup() { Serial.begin(115200); Serial.println("Booting"); WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); Serial.println("WiFi begun"); while (WiFi.waitForConnectResult() != WL_CONNECTED) { Serial.println("Connection Failed! Rebooting..."); delay(5000); ESP.restart(); } Serial.println("Proceeding"); // Port defaults to 8266 // ArduinoOTA.setPort(8266); // Hostname defaults to esp8266-[ChipID] // ArduinoOTA.setHostname("myesp8266"); // No authentication by default ArduinoOTA.setPassword((const char *)"730"); ArduinoOTA.onStart([]() { Serial.println("Start"); }); ArduinoOTA.onEnd([]() { Serial.println("\nEnd"); }); ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) { Serial.printf("Progress: %u%%\r", (progress / (total / 100))); }); ArduinoOTA.onError([](ota_error_t error) { Serial.printf("Error[%u]: ", error); if (error == OTA_AUTH_ERROR ) Serial.println("Auth Failed"); else if (error == OTA_BEGIN_ERROR ) Serial.println("Begin Failed"); else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed"); else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed"); else if (error == OTA_END_ERROR ) Serial.println("End Failed"); }); ArduinoOTA.begin(); Serial.println("Ready"); Serial.print("IP address: "); Serial.println(WiFi.localIP()); /* Set up the outputs. LED is active-low */ pinMode(ledPin, OUTPUT); pinMode(relayPin, OUTPUT); digitalWrite(ledPin, HIGH); digitalWrite(relayPin, LOW); /* Prepare MQTT client */ client.setServer(broker, 1883); client.setCallback(callback); } /** * Main */ void loop() { ArduinoOTA.handle(); if (WiFi.status() != WL_CONNECTED) { Serial.print("Connecting to "); Serial.print(ssid); Serial.println("..."); WiFi.begin(ssid, password); if (WiFi.waitForConnectResult() != WL_CONNECTED) return; Serial.println("WiFi connected"); } if (WiFi.status() == WL_CONNECTED) { if (!client.connected()) { reconnect(); } } if (client.connected()) { client.loop(); } } /* * NodeMCU pin mapping. Pin numbers written on the board itself do not correspond to ESP8266 GPIO pin numbers. D numbers on the board GPIO static const uint8_t D0 = 16; static const uint8_t D1 = 5; static const uint8_t D2 = 4; static const uint8_t D3 = 0; static const uint8_t D4 = 2; static const uint8_t D5 = 14; static const uint8_t D6 = 12; static const uint8_t D7 = 13; static const uint8_t D8 = 15; static const uint8_t D9 = 3; static const uint8_t D10 = 1; Sonoff Outputs const int relayPin = 12; const int ledPin = 13; */ |