Create/modify example code and main code base

example.ino

@@ -0,0 +1,157 @@
+/*********
+  Rui Santos
+  Complete project details at https://randomnerdtutorials.com  
+*********/
+
+#include <WiFi.h>
+#include <PubSubClient.h>
+#include <Wire.h>
+#include <Adafruit_BME280.h>
+#include <Adafruit_Sensor.h>
+
+// Replace the next variables with your SSID/Password combination
+const char* ssid = "REPLACE_WITH_YOUR_SSID";
+const char* password = "REPLACE_WITH_YOUR_PASSWORD";
+
+// Add your MQTT Broker IP address, example:
+//const char* mqtt_server = "192.168.1.144";
+const char* mqtt_server = "YOUR_MQTT_BROKER_IP_ADDRESS";
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+long lastMsg = 0;
+char msg[50];
+int value = 0;
+
+//uncomment the following lines if you're using SPI
+/*#include <SPI.h>
+#define BME_SCK 18
+#define BME_MISO 19
+#define BME_MOSI 23
+#define BME_CS 5*/
+
+Adafruit_BME280 bme; // I2C
+//Adafruit_BME280 bme(BME_CS); // hardware SPI
+//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
+float temperature = 0;
+float humidity = 0;
+
+// LED Pin
+const int ledPin = 4;
+
+void setup() {
+  Serial.begin(115200);
+  // default settings
+  // (you can also pass in a Wire library object like &Wire2)
+  //status = bme.begin();  
+  if (!bme.begin(0x76)) {
+    Serial.println("Could not find a valid BME280 sensor, check wiring!");
+    while (1);
+  }
+  setup_wifi();
+  client.setServer(mqtt_server, 1883);
+  client.setCallback(callback);
+
+  pinMode(ledPin, OUTPUT);
+}
+
+void setup_wifi() {
+  delay(10);
+  // We start by connecting to a WiFi network
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void callback(char* topic, byte* message, unsigned int length) {
+  Serial.print("Message arrived on topic: ");
+  Serial.print(topic);
+  Serial.print(". Message: ");
+  String messageTemp;
+  
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)message[i]);
+    messageTemp += (char)message[i];
+  }
+  Serial.println();
+
+  // Feel free to add more if statements to control more GPIOs with MQTT
+
+  // If a message is received on the topic esp32/output, you check if the message is either "on" or "off". 
+  // Changes the output state according to the message
+  if (String(topic) == "esp32/output") {
+    Serial.print("Changing output to ");
+    if(messageTemp == "on"){
+      Serial.println("on");
+      digitalWrite(ledPin, HIGH);
+    }
+    else if(messageTemp == "off"){
+      Serial.println("off");
+      digitalWrite(ledPin, LOW);
+    }
+  }
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Attempt to connect
+    if (client.connect("ESP8266Client")) {
+      Serial.println("connected");
+      // Subscribe
+      client.subscribe("esp32/output");
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+void loop() {
+  if (!client.connected()) {
+    reconnect();
+  }
+  client.loop();
+
+  long now = millis();
+  if (now - lastMsg > 5000) {
+    lastMsg = now;
+    
+    // Temperature in Celsius
+    temperature = bme.readTemperature();   
+    // Uncomment the next line to set temperature in Fahrenheit 
+    // (and comment the previous temperature line)
+    //temperature = 1.8 * bme.readTemperature() + 32; // Temperature in Fahrenheit
+    
+    // Convert the value to a char array
+    char tempString[8];
+    dtostrf(temperature, 1, 2, tempString);
+    Serial.print("Temperature: ");
+    Serial.println(tempString);
+    client.publish("esp32/temperature", tempString);
+
+    humidity = bme.readHumidity();
+    
+    // Convert the value to a char array
+    char humString[8];
+    dtostrf(humidity, 1, 2, humString);
+    Serial.print("Humidity: ");
+    Serial.println(humString);
+    client.publish("esp32/humidity", humString);
+  }
+}

window_control/window_control.ino

@@ -24,60 +24,96 @@ void setup() {
   // Initalize buzzer pin
   pinMode(buzzer, OUTPUT);
   digitalWrite(buzzer, LOW);
+
+  // Initalize motor directions
+  pinMode(motorReverse, OUTPUT);
+  digitalWrite(motorReverse, LOW);
+  pinMode(motorForward, OUTPUT);
+  digitalWrite(motorForward, LOW);
+
+  // Initalize Sense Pin
+  pinMode(sense, INPUT);
+  // use "digitalRead(sense);" to read
 }
 
 void setup_wifi() {
   delay(10);
-  // We start by connecting to a WiFi network
-  Serial.println();
-  WiFi.hostname("ESP-" WINDOW_NAME);
-  Serial.print("Connecting to ");
-  Serial.println(WIFI_SSID);
 
+  // Set our hostname
+  WiFi.hostname("ESP-" WINDOW_NAME);
+
+  // Connect to the wifi!
   WiFi.begin(WIFI_SSID, WIFI_PASS);
 
+  // For as long as we're not connected..
   while (WiFi.status() != WL_CONNECTED) {
-    delay(950);
+    delay(950); // Wait...
-    tone(buzzer, 1200, 50);
+    tone(buzzer, 1200, 50); // Beep...
-    Serial.println("Not yet connected.. Waiting 1s to check again..");
+    //Serial.println("Not yet connected.. Waiting 1s to check again..");
   }
 
-  Serial.println("");
+  //Serial.println("");
-  Serial.println("WiFi connected");
+  //Serial.println("WiFi connected");
-  Serial.println("IP address: ");
+  //Serial.println("IP address: ");
-  Serial.println(WiFi.localIP());
+  //Serial.println(WiFi.localIP());
 }
 
 void reconnect() {
   // Loop until we're reconnected
   while (!client.connected()) {
-    Serial.print("Attempting MQTT connection...");
+    //Serial.print("Attempting MQTT connection...");
     // Attempt to connect
     if (client.connect("ESP8266Client", MQTT_USER, MQTT_PASS)) {
-      Serial.println("connected");
+      //Serial.println("connected");
+      ;
     } else {
-      Serial.print("failed, rc=");
+      //Serial.print("failed, rc=");
-      Serial.print(client.state());
+      //Serial.print(client.state());
-      Serial.println(" try again in 5 seconds");
+      //Serial.println(" try again in 5 seconds");
       // Wait 5 seconds before retrying
       delay(5000);
     }
   }
 }
 
-void callback(char* topic, byte* payload, unsigned int length) {
+void callback(char* topic, byte* message, unsigned int length) {
- Serial.print("Message arrived [");
+  //Serial.print("Message arrived on topic: ");
- Serial.print(topic);
+  //Serial.print(topic);
- Serial.print("] ");
+  //Serial.print(". Message: ");
+  String messageString;
+
+  // Reconstruct a string from the mqtt contents.
   for (int i = 0; i < length; i++) {
-  char receivedChar = (char)payload[i];
+    messageString += (char)message[i];
-  Serial.print(receivedChar);
+  }
-  if (receivedChar == '0')
+
-   //digitalWrite(in_led, LOW);
+  if (String(topic) == MQTT_ROOT "/request_state") {
-  if (receivedChar == '1')
+    //Serial.print("Changing output to ");
-   //digitalWrite(in_led, HIGH);
+    if(messageString == "open"){
+      //Serial.println("Opening window.");
+      digitalWrite(motorForward, HIGH);
+      digitalWrite(motorReverse, LOW);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      client.publish(MQTT_ROOT "/current_state", "open", true);
+    }
+    else if(messageString == "close"){
+      //Serial.println("Closing window");
+      digitalWrite(motorForward, LOW);
+      digitalWrite(motorReverse, HIGH);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      tone(buzzer, 2000, 200);
+      delay(200);
+      client.publish(MQTT_ROOT "/current_state", "close", true);
+    }
   }
- Serial.println();
 }
 
 void loop() {
@@ -89,10 +125,6 @@ void loop() {
   // Run the client loop
   client.loop();
   
-  // Publishes a random 0 and 1 like someone switching off and on randomly (random(2))
+  client.subscribe(MQTT_ROOT "/request_state");
-  client.publish(MQTT_ROOT "/random", String(random(2)).c_str(), true);
-  delay(1000);
-  client.subscribe(MQTT_ROOT "/in");
-  tone(buzzer, 2000, 500);
   delay(1000);
 }