first commit

arduino_mqtt.ino

@@ -0,0 +1,108 @@
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <SPI.h>
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+#define OLED_RESET 0  // GPIO0
+Adafruit_SSD1306 display(OLED_RESET);
+
+#if (SSD1306_LCDHEIGHT != 48)
+#error("Height incorrect, please fix Adafruit_SSD1306.h!");
+#endif
+
+const char* ssid = "IoT-Zecevic";
+const char* password =  "IoTSifra123456!";
+const char* mqttServer = "192.168.1.11";
+const int mqttPort = 1883;
+const char* mqttUser = "yourMQTTuser";
+const char* mqttPassword = "yourMQTTpassword";
+ 
+WiFiClient espClient;
+PubSubClient client(espClient);
+ 
+void callback(char* topic, byte* payload, unsigned int length) {
+ 
+  Serial.print("Message arrived in topic: ");
+  Serial.println(topic);
+ 
+  Serial.print("Message:");
+  display.clearDisplay();
+  display.setTextSize(1);
+  display.setTextColor(WHITE);
+  display.setCursor(0,0);
+  display.println("Power: ");
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)payload[i]);
+    display.setTextSize(2);
+    display.print((char)payload[i]);
+  }
+  
+  display.display();
+  Serial.println();
+  Serial.println("-----------------------");
+ 
+}
+ 
+void setup() {
+
+  Serial.begin(115200);
+
+  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
+  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 64x48)
+  // init done
+
+  // Clear the buffer.
+  display.clearDisplay();
+
+   WiFi.begin(ssid, password);
+ 
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.println("Connecting to WiFi..");
+  }
+  Serial.println("Connected to WiFi");
+  display.setTextSize(1);
+  display.setTextColor(WHITE);
+  display.setCursor(0,0);
+  display.println("Connected to the WiFi network!");
+  display.display(); 
+ 
+  client.setServer(mqttServer, mqttPort);
+  client.setCallback(callback);
+ 
+  while (!client.connected()) {
+    Serial.println("Connecting to MQTT...");
+ 
+    if (client.connect("ESP32Client", mqttUser, mqttPassword )) {
+ 
+      Serial.println("connected");
+      Serial.println("Connected to mqtt!");
+      display.setTextSize(1);
+      display.setTextColor(WHITE);
+      display.println("Connected to mqtt!");
+      display.println("No data yet");
+      display.display();   
+ 
+    } else {
+ 
+      Serial.print("failed with state ");
+      Serial.print(client.state());
+      delay(2000);
+ 
+    }
+  }
+  //solar power
+  client.subscribe("solar/114182126368/0/power");
+  
+  /*client.subscribe("tele/tasmota_server_C32969/SENSOR");
+  client.subscribe("tele/tasmota_LR-C23E87/SENSOR");
+  client.subscribe("tele/tasmota_OfficeNET_17A00F/SENSOR");
+  client.subscribe("tele/tasmota_OfficePC1856E2/SENSOR");*/
+ 
+}
+ 
+void loop() {
+  client.loop();
+}