56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// Create an ESP8266 WiFiClient class to connect to the MQTT server.
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WiFiClient client;
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Adafruit_MQTT_Client *mqtt;
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Adafruit_MQTT_Publish *mqtt_temp;
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const char TEMPERATURE_FEED[] = "/feeds/temperature";
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boolean mqttIsConfigured;
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int publishMQTT(double temp) {
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if (MQTT_connect() == 0) {
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Serial.println("publishing !");
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mqtt_temp->publish(temp);
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}
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}
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int setupMQTT(char *server, char *user, char *passwd, int port) {
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if(server == ""){
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Serial.println("Mqtt Server not configured");
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}
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// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
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mqtt = new Adafruit_MQTT_Client(&client, server, port, user, passwd);
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mqtt_temp = new Adafruit_MQTT_Publish(mqtt, TEMPERATURE_FEED);
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return 0;
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}
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int MQTT_isConnected(){
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return mqtt->connected();
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}
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// Function to connect and reconnect as necessary to the MQTT server.
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// Should be called in the loop function and it will take care if connecting.
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int MQTT_connect() {
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int8_t ret;
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// Stop if already connected.
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if (mqtt->connected()) {
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return 0;
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}
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uint8_t retries = 3;
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while ((ret = mqtt->connect()) != 0) { // connect will return 0 for connected
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Serial.println(mqtt->connectErrorString(ret));
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Serial.println("Retrying MQTT connection ...");
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mqtt->disconnect();
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delay(100); // wait
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retries--;
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if (retries == 0) {
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return -1;
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}
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}
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return 0;
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}
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