adityahazarika08
Published © GPL3+

Node.js web page controlled Robotic Car (Wireless)

A wireless ROVER which is controlled by a web-page served by Node.js server, with the help of Sockets.

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Node.js web page controlled Robotic Car (Wireless)

Things used in this project

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Schematics

Circuit Diagram

Data Transmission

Code

Node Rover Arduino Code

Arduino
const int en1 = 9;
const int en2 = 3;
const int inp1 = 2;
const int inp2 = 4;
const int inp3 = 7;
const int inp4 = 8;
char charRead;
String inputString = "";

void setup() {
  Serial.begin(9600);
  pinMode(en1, OUTPUT);
  pinMode(en2, OUTPUT);
  pinMode(inp1, OUTPUT);
  pinMode(inp2, OUTPUT);
  pinMode(inp3, OUTPUT);
  pinMode(inp4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available()) {
    charRead = Serial.read();
    if (charRead != 'T') {
      inputString += charRead;
    } else {
      if (inputString == "forward") {
        // To move Forward
        digitalWrite(inp1, HIGH);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, HIGH);
        digitalWrite(inp4, LOW);
      } else if (inputString == "backward") {
        // To move backward
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, HIGH);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, HIGH);
      } else if (inputString == "fleft") {
        // To move left
        digitalWrite(inp1, HIGH);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, LOW);
      } else if (inputString == "fright") {
        // To move right
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, HIGH);
        digitalWrite(inp4, LOW);
      }
      else if (inputString == "bleft") {
        // To move back left
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, HIGH);
      }
      else if (inputString == "bright") {
        // To move back right
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, HIGH);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, LOW);
      }
      else if (inputString == "break") {
        // To Stop
        analogWrite(en1, 50);
        analogWrite(en2, 50);
        delay(550);
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, LOW);
        analogWrite(en1, 150);
        analogWrite(en2, 150);
      }
      else if (inputString == "maxspeed") {
        // Max speed
        analogWrite(en1, 250);
        analogWrite(en2, 250);
      }
      else if (inputString == "medspeed") {
        // Medium Speed
        analogWrite(en1, 180);
        analogWrite(en2, 180);
      }
      else if (inputString == "lowspeed") {
        // Low speed
        analogWrite(en1, 90);
        analogWrite(en2, 90);
      }
      else {
        // Stop
        digitalWrite(inp1, LOW);
        digitalWrite(inp2, LOW);
        digitalWrite(inp3, LOW);
        digitalWrite(inp4, LOW);
      }
      inputString = "";
    }
  }
}

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adityahazarika08

adityahazarika08

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