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- #include <ESP8266WiFi.h>
- #include <PubSubClient.h>
- const char* ssid = "xxx";
- const char* password = "xxx";
- const char* mqttServer = "m24.cloudmqtt.com";
- const int mqttPort = 15031;
- const char* mqttUser = "xxx";
- const char* mqttPassword = "xxx";
- int ledPin = 13; // GPIO13
- bool isOn = false;
- WiFiClient espClient;
- PubSubClient client(espClient);
- void setup() {
- Serial.begin(9600);
- delay(10);
- pinMode(ledPin, OUTPUT);
- digitalWrite(ledPin, LOW);
- // Connect to WiFi network
- Serial.println();
- Serial.println();
- Serial.print("Connecting to ");
- Serial.println(ssid);
- WiFi.begin(ssid, password);
- while (WiFi.status() != WL_CONNECTED) {
- delay(500);
- Serial.print(".");
- }
- Serial.println("");
- Serial.println("WiFi connected");
- client.setServer(mqttServer, mqttPort);
- client.setCallback(callback);
- while (!client.connected()) {
- Serial.println("Connecting to MQTT...");
- if (client.connect("ESP8266ClientB", mqttUser, mqttPassword )) {
- Serial.println("connected");
- } else {
- Serial.print("failed with state ");
- Serial.print(client.state());
- delay(2000);
- }
- }
- client.subscribe("esp/blinker");
- }
- void callback(char* topic, byte* payload, unsigned int length) {
- Serial.println(topic);
- if(strcmp(topic, "esp/blinker") == 0) {
- // blink message
- char message[50];
- sprintf(message, "esp/blinker sent a message: %s", (char *)payload);
- Serial.println(message);
- }
- }
- void loop() {
- client.loop();
- }
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