准备工作

• 树莓派
  

• 马达
  - L298N双H桥直流电机驱动器
  

• 杜邦线

-底盘&轮胎

接线

小车跑起来

# coding=utf-8
from flask import Flask

import RPi.GPIO as GPIO
import time



app = Flask(__name__)
@app.route('/')
def runcar():
    from flask import request

    GPIO.setmode(GPIO.BOARD)
    INT1 = 11
    INT2 = 12
    INT3 = 13
    INT4 = 15
    GPIO.setup(INT1, GPIO.OUT)
    GPIO.setup(INT2, GPIO.OUT)
    GPIO.setup(INT3, GPIO.OUT)
    GPIO.setup(INT4, GPIO.OUT)

    # 获取请求中查询参数
    direction = request.args.get('direction')
    linetime = 1
    if (direction == 'w'):
        GPIO.output(INT1, GPIO.HIGH)
        GPIO.output(INT2, GPIO.LOW)
        GPIO.output(INT3, GPIO.HIGH)
        GPIO.output(INT4, GPIO.LOW)
        time.sleep(linetime)
        GPIO.cleanup()
        text = '向前'
    if (direction == 'd'):
        GPIO.output(INT1, GPIO.LOW)
        GPIO.output(INT2, GPIO.HIGH)
        GPIO.output(INT3, GPIO.LOW)
        GPIO.output(INT4, GPIO.HIGH)
        time.sleep(linetime)
        GPIO.cleanup()
        text = '向后'


    if (direction == 'l'):
        GPIO.output(INT1, GPIO.HIGH)
        GPIO.output(INT2, GPIO.LOW)
        GPIO.output(INT3, GPIO.LOW)
        GPIO.output(INT4, GPIO.LOW)
        time.sleep(linetime)
        GPIO.cleanup()
        text = '向左'
    if (direction == 'r'):
        GPIO.output(INT1, GPIO.HIGH)
        GPIO.output(INT2, GPIO.LOW)
        GPIO.output(INT3, GPIO.LOW)
        GPIO.output(INT4, GPIO.LOW)
        time.sleep(linetime)
        GPIO.cleanup()
        text = '向右'
    return text

# 启动flask服务器
if __name__ == '__main__':
    app.run(host="0.0.0.0",port=8888,debug=True)

api 控制小车

通过浏览器访问api控制小车（'w’表示前进,'d’表示后退,'l’表示左转,'r’表示右转）
http://192.168.1.100:8888/?direction=w