Line following car

Electronics Project/Line Following Car/Readme.md

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+_*Line Following Car*_
+
+- It is an electric car connected the right way using the infrared sensors.
+- It's main work is to travel over the black line, by not leaving the black line trail.

Electronics Project/Line Following Car/line_follow/line_follow.ino

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+#define IRl 4  //red wala sensor
+#define IRr 2  //green wala sensor
+bool irR,irL;
+
+//Motor A
+const int inputPin1  = 7;     //  INR3
+const int inputPin2  = 6;     //  INR4 
+
+//Motor B
+const int inputPin3  = 9;     //  INR1
+const int inputPin4  = 8;     //  INR2
+
+#define EN1  5
+#define EN2  3
+
+/*
+//Motor A
+#define inputPin1  D7;     //  INR3
+#define inputPin2  D6;     //  INR4 
+
+//Motor B
+#define inputPin3  D9;     //  INR1
+#define inputPin4  D8;     //  INR2
+
+#define EN1  D10                 
+#define EN2  D5    
+*/
+void setup()
+{
+    pinMode(EN1, OUTPUT);   // where the motor is connected to
+    pinMode(EN2, OUTPUT);   // where the motor is connected to
+    pinMode(inputPin1, OUTPUT);
+    pinMode(inputPin2, OUTPUT);
+    pinMode(inputPin3, OUTPUT);
+    pinMode(inputPin4, OUTPUT);  
+    pinMode(IRl,INPUT);
+    pinMode(IRr,INPUT);
+    int speed =81;
+    analogWrite(EN1, speed);//sets the motors speed
+    analogWrite(EN2, speed);//sets the motors speed
+    Serial.begin(9600);
+}
+
+void loop()
+{
+    irL = digitalRead(IRl);
+    irR = digitalRead(IRr);
+
+    if (irL==1 && irR==1){
+      stop();
+      Serial.println("rukkk bete");
+    }
+    else if (irL==1 && irR==0){
+      right();
+      Serial.println("dayne mudle bete");
+    }
+    else if (irL==0 && irR==1){
+      left();
+      Serial.println("bayne mudlee bete");
+    }
+    else if (irL==0 && irR==0){
+      forward();
+      Serial.println("chl bete");
+    }    
+}
+
+void left(void)
+{
+    digitalWrite(inputPin1, HIGH);
+    digitalWrite(inputPin2, LOW);
+    digitalWrite(inputPin3, HIGH);
+    digitalWrite(inputPin4, LOW);  
+}
+
+void right(void)
+{
+    digitalWrite(inputPin1, LOW);
+    digitalWrite(inputPin2, HIGH);
+    digitalWrite(inputPin3, LOW);
+    digitalWrite(inputPin4, HIGH); 
+}
+
+void stop(void)
+{ 
+    digitalWrite(inputPin1, LOW);
+    digitalWrite(inputPin2, LOW);
+    digitalWrite(inputPin3, LOW);
+    digitalWrite(inputPin4, LOW); 
+}
+
+void backward(void)
+{   
+    digitalWrite(inputPin1, LOW);
+    digitalWrite(inputPin2, HIGH);
+    digitalWrite(inputPin3, HIGH);
+    digitalWrite(inputPin4, LOW); 
+}
+
+void forward(void)
+{ 
+    digitalWrite(inputPin1, HIGH);
+    digitalWrite(inputPin2, LOW);
+    digitalWrite(inputPin3, LOW);
+    digitalWrite(inputPin4, HIGH); 
+}

IoT Projects/GoogleAssitance_Automation_/GoogleAssitance_Automation_.ino

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+#include <ESP8266WiFi.h>
+#include "Adafruit_MQTT.h"
+#include "Adafruit_MQTT_Client.h"
+#define Relay1            D6
+#define Relay2            D5
+#define Relay3            D2
+#define Relay4            D1
+#define WLAN_SSID       "rakhyaar..majekar"             // Your SSID
+#define WLAN_PASS       "kunalbandooni"        // Your password
+/************************* Adafruit.io Setup *********************************/
+#define AIO_SERVER      "io.adafruit.com"
+#define AIO_SERVERPORT  1883                   // use 8883 for SSL
+#define AIO_USERNAME    "kbandooni1"            // Replace it with your username
+#define AIO_KEY         "aio_IlGW14oIEoK8mlMirMgRyy15v6h6"   // Replace with your Project Auth Key
+/************ Global State (you don't need to change this!) ******************/
+// Create an ESP8266 WiFiClient class to connect to the MQTT server.
+WiFiClient client;
+// or... use WiFiFlientSecure for SSL
+//WiFiClientSecure client;
+// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
+Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
+/****************************** Feeds ***************************************/
+// Setup a feed called 'onoff' for subscribing to changes.
+Adafruit_MQTT_Subscribe Light1 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME"/feeds/Relay1"); // FeedName
+Adafruit_MQTT_Subscribe Light2 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay2");
+Adafruit_MQTT_Subscribe Light3 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay3");
+Adafruit_MQTT_Subscribe Light4 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay4");
+void MQTT_connect();
+void setup() {
+  Serial.begin(115200);
+  pinMode(Relay1, OUTPUT);
+  pinMode(Relay2, OUTPUT);
+  pinMode(Relay3, OUTPUT);
+  pinMode(Relay4, OUTPUT);
+  // Connect to WiFi access point.
+  Serial.println(); Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(WLAN_SSID);
+  WiFi.begin(WLAN_SSID, WLAN_PASS);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println();
+  Serial.println("WiFi connected");
+  Serial.println("IP address: "); 
+  Serial.println(WiFi.localIP());
+  // Setup MQTT subscription for onoff feed.
+  mqtt.subscribe(&Light1);
+  mqtt.subscribe(&Light3);
+  mqtt.subscribe(&Light2);
+  mqtt.subscribe(&Light4);
+}
+void loop() {
+  MQTT_connect();
+  Adafruit_MQTT_Subscribe *subscription;
+  while ((subscription = mqtt.readSubscription(20000))) {
+    if (subscription == &Light1) {
+      Serial.print(F("Got: "));
+      Serial.println((char *)Light1.lastread);
+      int Light1_State = atoi((char *)Light1.lastread);
+      digitalWrite(Relay1, Light1_State);    
+    }
+    if (subscription == &Light2) {
+      Serial.print(F("Got: "));
+      Serial.println((char *)Light2.lastread);
+      int Light2_State = atoi((char *)Light2.lastread);
+      digitalWrite(Relay2, Light2_State);
+    }
+    if (subscription == &Light3) {
+      Serial.print(F("Got: "));
+      Serial.println((char *)Light3.lastread);
+      int Light3_State = atoi((char *)Light3.lastread);
+      digitalWrite(Relay3, Light3_State);
+    }
+    if (subscription == &Light4) {
+      Serial.print(F("Got: "));
+      Serial.println((char *)Light4.lastread);
+      int Light4_State = atoi((char *)Light4.lastread);
+      digitalWrite(Relay4, Light4_State);
+    }
+  }
+}
+void MQTT_connect() {
+  int8_t ret;
+  // Stop if already connected.
+  if (mqtt.connected()) {
+    return;
+  }
+  Serial.print("Connecting to MQTT... ");
+  uint8_t retries = 3;
+  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
+    Serial.println(mqtt.connectErrorString(ret));
+    Serial.println("Retrying MQTT connection in 5 seconds...");
+    mqtt.disconnect();
+    delay(5000);  // wait 5 seconds
+    retries--;
+    if (retries == 0) {
+      // basically die and wait for WDT to reset me
+      while (1);
+    }
+  }
+  Serial.println("MQTT Connected!");
+}

IoT Projects/GoogleAssitance_Automation_/Readme.md

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+_*Google Home Automation*_
+
+- It helps to use the home lights and fans, or any other electrical appliance via Google Assistant.
+- All we need is the correct connection of the NodeMCU and the WiFi.