#ifndef _WIFI_FUNCTIONS_H_ #define _WIFI_FUNCTIONS_H_ #include #include #include "wifi_settings.h" WiFiClient net; MQTTClient client; void connect() { Serial.print("checking wifi..."); while (WiFi.status() != WL_CONNECTED) { Serial.print("."); delay(1000); } Serial.print("\nconnecting..."); while (!client.connect(client_id, "public", "public")) { Serial.print("."); delay(1000); } Serial.println("\nconnected!"); client.subscribe("/hello"); // client.unsubscribe("/hello"); } void messageReceived(String &topic, String &payload) { Serial.println("incoming: " + topic + " - " + payload); // Note: Do not use the client in the callback to publish, subscribe or // unsubscribe as it may cause deadlocks when other things arrive while // sending and receiving acknowledgments. Instead, change a global variable, // or push to a queue and handle it in the loop after calling `client.loop()`. } #endif