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--- amc2022:esp32_mqtt:start [2022/05/24 13:27] – created rolf001
+++ amc2022:esp32_mqtt:start [2023/01/05 14:38] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== ESP32 MQTT Connection ======
+{{https://joy-it.net/files/files/Produkte/SBC-NodeMCU-ESP32/SBC-NodeMCU-ESP32-Manual-2021-06-29.pdf|NodeMCU-ESP32-Manual}}
 ===== Jude's Code =====
-<code>
+<file c++ ESP32_MQTT_Jude_V001.ino>
-#include <WiFi.h>
-#include <PubSubClient.h>
-// WiFi
-const char *ssid = "iotlab"; // ssid
-const char *password = "iotlab18";  //WiFi password
-// MQTT Broker
-const char *mqtt_broker = "broker.emqx.io";
-const char *topic = "esp32/test";
-const char *mqtt_username = "emqx";
-const char *mqtt_password = "public";
-const int mqtt_port = 1883;
-WiFiClient espClient;
-PubSubClient client(espClient);
-void setup() {
- // Set software serial baud to 115200;
- Serial.begin(115200);
- // connecting to a WiFi network
- WiFi.begin(ssid, password);
- while (WiFi.status() != WL_CONNECTED) {
-     delay(500);
-     Serial.println("Connecting to WiFi..");
- }
- Serial.println("Connected to the WiFi network");
- //connecting to a mqtt broker
- client.setServer(mqtt_broker, mqtt_port);
- client.setCallback(callback);
- while (!client.connected()) {
-     String client_id = "esp32-client-";
-     client_id += String(WiFi.macAddress());
-     Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str());
-     if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
-         Serial.println("Public emqx mqtt broker connected");
-     } else {
-         Serial.print("failed with state ");
-         Serial.print(client.state());
-         delay(2000);
-     }
- }
- // publish and subscribe
- client.publish(topic, "Hi EMQX I'm ESP32 ^^");
- client.publish(topic, "Hi My name is Bambo Jude ^^");
- client.publish(topic, "Hey Suleman!!!!");
- client.subscribe(topic);
-}
-void callback(char *topic, byte *payload, unsigned int length) {
+TO BE UPDATED!
- Serial.print("Message arrived in topic: ");
- Serial.println(topic);
- Serial.print("Message:");
- for (int i = 0; i < length; i++) {
-     Serial.print((char) payload[i]);
- }
- Serial.println();
- Serial.println("-----------------------");
-}
-void loop() {
+</file>
- client.loop();
-}
-</code>