Yannis Ragkavas
Published

Raspberypi remote controlled car

I created a raspberry pi remote-controlled car using Blynk.

BeginnerFull instructions provided5 hours604
Raspberypi remote controlled car

Things used in this project

Hardware components

Raspberry Pi Zero
Raspberry Pi Zero
×1
Battery Holder, 18650 x 2
Battery Holder, 18650 x 2
×1
3.7v 18650 Battery
×1
L298N Dual Motor Driver
×1

Software apps and online services

Raspbian
Raspberry Pi Raspbian
Blynk
Blynk

Hand tools and fabrication machines

10 Pc. Jumper Wire Kit, 5 cm Long
10 Pc. Jumper Wire Kit, 5 cm Long

Story

Read more

Schematics

Fritzing

Code

RemoteCar.py

Python
run it from raspberrypi terminal using sudo python3 remotecar.py
import psutil
import os
import sys
import Adafruit_DHT
import RPi.GPIO as GPIO
import time
from gpiozero import Motor,LED
from time import sleep
from gpiozero import DistanceSensor
import base64
import blynklib
 

in1 = 23
in2 = 24
en = 25
in3 = 17
in4 = 27
en2 = 22
start_speed=80
turn_speed=80
turn_ancle=0.3


BLYNK_AUTH = {YOUR_AUTH_CODE} #insert your Auth Token here
# base lib init
blynk = blynklib.Blynk(BLYNK_AUTH)

name = "Ragas PI"

GPIO.setmode(GPIO.BCM)
GPIO.cleanup()
GPIO.setwarnings(False)

GPIO.setup(in1,GPIO.OUT)
GPIO.setup(in2,GPIO.OUT)
GPIO.setup(in3, GPIO.OUT)
GPIO.setup(in4, GPIO.OUT)
GPIO.setup(en,GPIO.OUT)
GPIO.setup(en2,GPIO.OUT)

GPIO.output(in1,GPIO.LOW)
GPIO.output(in2,GPIO.LOW)
GPIO.output(in3,GPIO.LOW)
GPIO.output(in4,GPIO.LOW)
p=GPIO.PWM(en,1000)
p1=GPIO.PWM(en2, 1000)
p.start(start_speed)
p1.start(start_speed)


def CarForward(*args):
    print("forward")
    p.ChangeDutyCycle(start_speed)
    p1.ChangeDutyCycle(start_speed)
    GPIO.output(in1,GPIO.HIGH)
    GPIO.output(in2,GPIO.LOW)
    GPIO.output(in3,GPIO.HIGH)
    GPIO.output(in4,GPIO.LOW)   
    led.on()
    
def CarRight(*args):
    print("right")
    p.ChangeDutyCycle(turn_speed)
    p1.ChangeDutyCycle(turn_speed)
    GPIO.output(in1,GPIO.HIGH)
    GPIO.output(in2,GPIO.LOW)
    GPIO.output(in3,GPIO.LOW)
    GPIO.output(in4,GPIO.HIGH)
    sleep(turn_ancle)
    led.on()

def CarLeft(*args):
    print("left")
    p.ChangeDutyCycle(turn_speed)
    p1.ChangeDutyCycle(turn_speed)
    GPIO.output(in1,GPIO.LOW)
    GPIO.output(in2,GPIO.HIGH)
    GPIO.output(in3,GPIO.HIGH)
    GPIO.output(in4,GPIO.LOW)
    sleep(turn_ancle)
    led.on()

def CarBack(*args):
    print("back")
    p.ChangeDutyCycle(start_speed)
    p1.ChangeDutyCycle(start_speed)
    GPIO.output(in1,GPIO.LOW)
    GPIO.output(in2,GPIO.HIGH)
    GPIO.output(in3,GPIO.LOW)
    GPIO.output(in4,GPIO.HIGH)  
    led.on()

def CarStop(*args):
    print("stop")
    GPIO.output(in1,GPIO.LOW)
    GPIO.output(in2,GPIO.LOW)
    GPIO.output(in3, GPIO.LOW)
    GPIO.output(in4,GPIO.LOW)
    led.off()
    
def CarSpeed(*args):

    global start_speed
    start_speed=float(args[0])
    print(start_speed)


def SystemEnd(*args):
    GPIO.cleanup()


def stop():
    CarStop()


@blynk.handle_event('write V5')
def write_virtual_pin_handler(pin, value):
    val=value[0]
    if val=="1":
        CarBack()
    elif val=="0":
        CarStop()

@blynk.handle_event('write V8')
def write_virtual_pin_handler(pin, value):
    val=value[0]
    if val=="1":
        CarForward()
    elif val=="0":
        CarStop()

@blynk.handle_event('write V7')
def write_virtual_pin_handler(pin, value):
    val=value[0]
    if val=="1":
        CarLeft()
    elif val=="0":
        CarStop()

@blynk.handle_event('write V6')
def write_virtual_pin_handler(pin, value):
    val=value[0]
    if val=="1":
        CarRight()
    elif val=="0":
        CarStop()

try:

    while True:
        blynk.run()
    
    
except KeyboardInterrupt:
    GPIO.cleanup()
    print("KeyError")
    
except Exception as e:
    GPIO.cleanup()
    print('The server is down. Try again later.'+str(e))
finally:
    print("finally")
    GPIO.cleanup()

Credits

Yannis Ragkavas

Yannis Ragkavas

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