82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
// This example uses an Adafruit Huzzah ESP8266
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// to connect to shiftr.io.
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//
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// You can check on your device after a successful
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// connection here: https://shiftr.io/try.
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//
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// by Joël Gähwiler
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// https://github.com/256dpi/arduino-mqtt
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#include <ESP8266WiFi.h>
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#include <MQTT.h>
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const char ssid[] = "ssid";
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const char pass[] = "pass";
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WiFiClientSecure net;
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MQTTClient client;
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unsigned long lastMillis = 0;
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void connect() {
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Serial.print("checking wifi...");
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while (WiFi.status() != WL_CONNECTED) {
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Serial.print(".");
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delay(1000);
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}
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// do not verify tls certificate
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// check the following example for methods to verify the server:
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// https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/examples/BearSSL_Validation/BearSSL_Validation.ino
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net.setInsecure();
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Serial.print("\nconnecting...");
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while (!client.connect("arduino", "try", "try")) {
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Serial.print(".");
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delay(1000);
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}
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Serial.println("\nconnected!");
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client.subscribe("/hello");
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// client.unsubscribe("/hello");
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}
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void messageReceived(String &topic, String &payload) {
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Serial.println("incoming: " + topic + " - " + payload);
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// Note: Do not use the client in the callback to publish, subscribe or
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// unsubscribe as it may cause deadlocks when other things arrive while
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// sending and receiving acknowledgments. Instead, change a global variable,
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// or push to a queue and handle it in the loop after calling `client.loop()`.
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}
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void setup() {
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Serial.begin(115200);
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WiFi.begin(ssid, pass);
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// Note: Local domain names (e.g. "Computer.local" on OSX) are not supported
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// by Arduino. You need to set the IP address directly.
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//
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// MQTT brokers usually use port 8883 for secure connections.
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client.begin("broker.shiftr.io", 8883, net);
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client.onMessage(messageReceived);
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connect();
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}
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void loop() {
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client.loop();
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delay(10); // <- fixes some issues with WiFi stability
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if (!client.connected()) {
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connect();
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}
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// publish a message roughly every second.
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if (millis() - lastMillis > 1000) {
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lastMillis = millis();
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client.publish("/hello", "world");
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}
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}
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