How to make a LINE FOLLOWING WITH OBSTACLE AVOIDING ROBOT/ ARDUINO LINE FOLLOWING ROBOT/ smart robot 

Hassan Arif yes it will work with 2 wheels

Thanks i tried and it works. Although i must say that the code had a few extra things which were not needed at all (at-least not in my case) so i made a few modifications to the code and now it works like a charm :) *Thanks Again*

Excuse me, if it is possible could you please send me the edited code ( in the comment section here)

Well i edited the code for only two motors at first, but later on i added two more motors for which the code provided by makerQ worked perfectly. All i edited in the code was the delay timings, and deleted a while loop, not any other major modification that i can remember, but unfortunately i don't have that code anymore, but if you can tell me the problem you're facing with this code i might be able to help.

So the thing that is happening is that my wheels are continuously moving backwards, unable to follow a line, and unable to avoid obstacles, what I did was that I just removed the while loop from the code giving me this: #include //Ultrasonic sensor function library. You must install this library int vSpeed = 110; int turn_speed = 230; // 0 - 255 max int t_p_speed = 125; int stop_distance = 12; int turn_delay = 10; //HC-SR04 Sensor connection const int trigPin = 11; const int echoPin = 12; //L293 Connection const int motorA1 = 3; const int motorA2 = 4; const int motorAspeed = 5; const int motorB1 = 7; const int motorB2 = 8; const int motorBspeed = 6; //Sensor Connection const int left_sensor_pin =9; const int right_sensor_pin =10; int turnspeed; int left_sensor_state; int right_sensor_state; long duration; int distance; void setup() { pinMode(motorA1, OUTPUT); pinMode(motorA2, OUTPUT); pinMode(motorB1, OUTPUT); pinMode(motorB2, OUTPUT); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); Serial.begin(9600); delay(3000); digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); distance= duration*0.034/2; Serial.print("Distance: "); Serial.println(distance); left_sensor_state = digitalRead(left_sensor_pin); right_sensor_state = digitalRead(right_sensor_pin); if(right_sensor_state == HIGH && left_sensor_state == LOW) { Serial.println("turning right"); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,LOW); digitalWrite(motorB2,HIGH); analogWrite (motorAspeed, vSpeed); analogWrite (motorBspeed, turn_speed); } if(right_sensor_state == LOW && left_sensor_state == HIGH) { Serial.println("turning left"); digitalWrite (motorA1,HIGH); digitalWrite(motorA2,LOW); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); analogWrite (motorAspeed, turn_speed); analogWrite (motorBspeed, vSpeed); delay(turn_delay); } if(right_sensor_state == LOW && left_sensor_state == LOW) { Serial.println("going forward"); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); analogWrite (motorAspeed, vSpeed); analogWrite (motorBspeed, vSpeed); delay(turn_delay); } if(right_sensor_state == HIGH && left_sensor_state == HIGH) { Serial.println("stop"); analogWrite (motorAspeed, 0); analogWrite (motorBspeed, 0); while(true){ } } if(distance < stop_distance) { digitalWrite (motorA1,HIGH); digitalWrite(motorA2,LOW); digitalWrite (motorB1,LOW); digitalWrite(motorB2,HIGH); delay(250); analogWrite (motorAspeed, 0); analogWrite (motorBspeed, 0); delay(500); digitalWrite (motorA1,HIGH); digitalWrite(motorA2,LOW); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); analogWrite (motorAspeed, t_p_speed); analogWrite (motorBspeed, t_p_speed); delay(900); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); analogWrite (motorAspeed, t_p_speed); analogWrite (motorBspeed, t_p_speed); delay(800); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,LOW); digitalWrite(motorB2,HIGH); delay(900); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); delay(700); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,LOW); digitalWrite(motorB2,HIGH); delay(650); digitalWrite (motorA1,LOW); digitalWrite(motorA2,HIGH); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); left_sensor_state == HIGH; while(left_sensor_state == LOW){ left_sensor_state = digitalRead(left_sensor_pin); right_sensor_state = digitalRead(right_sensor_pin); Serial.println("in the first while"); } digitalWrite (motorA1,HIGH); digitalWrite(motorA2,LOW); digitalWrite (motorB1,LOW); digitalWrite(motorB2,HIGH); delay(100); digitalWrite (motorA1,HIGH); digitalWrite(motorA2,LOW); digitalWrite (motorB1,HIGH); digitalWrite(motorB2,LOW); delay (500); } } void loop() { } But what's happening is that the motors/wheels continuously move backwards, unable to do anything else. Please help and thank you for the kind reply!

Bhai code ka link open kiya to no preview available aa raha h kya karr

which is the while loop to be deleted

bro what is the battery used ?i m using RS.20 9v battery but its not working?

i have problem with code/.... can you help me

MAKER Q I want a coad now pls

I'm using arduino uno for this project but the robot won't run at all, you said you have to delete the while loop first but I don't know where the while loop is, please show me 🙏🙏

Did you do it?

You just have to buy a bluetooth module, connect it to the arduino, compile a bluetooth app to control the car. After all that, compile a code for the arduino so that the bluetooth module on the car can give orders to the arduino board that controls the car

you done yet?

@@nguyenthanhhoan4223 yup lol its been year now

you done yet?

Thắng Huy Yes

xe chạy được chưa bro ơi.

DOWNLOAD it.

Please share this code without rotating it

Have you removed the while loop from the code?

Yess sir but it is not moving at all, can you send me you email address so that i can send you my codes and tell me what am doing wrong .

Yeah I can't afford arduino nano

Maybe the library in which you're compiling the code ?

if you have code correct pls help me belkadirac@gmail.com

you have no problem you can use any arduino

you done yet?

it will be on , if power is supplied

What you mean?

Yudhi Ardian Arduino nano

i too did it, motors running, but not following line