android / IOS 下需先安裝 V7RC app，手機要先用 WiFi 連上 ESP32 的網路來使用

# 範例二十:

# 用手機 V7RC app 透過 WIFI-UDP 來控制自走車

# 手機需安裝 V7RC app

# 需要的 module : motor、dgram、ble_uart，tools，const

# FB : https://www.facebook.com/mason.chen.1420

from motor import L9110S,Car

import network

import uasyncio

from dgram import UDPServer

import math

CH1 = None

CH2 = None

def cb(msg,adr):

CH1 = int(((msg).decode('utf-8')[3:7]),10)

CH2 = int(((msg).decode('utf-8')[7:11]),10)

print(CH1)

if math.fabs(CH1 - 1500) < 100 and math.fabs(CH2 - 1500) < 100:

car.stop()

elif math.fabs(CH1 - 1500) > math.fabs(CH2 - 1500):

if CH1 > 1500:

car.move(4)

else:

car.move(3)

else:

if CH2 > 1500:

car.move(1)

else:

car.move(2)

CH1 = 1500

CH2 = 1500

m1 = L9110S(25, 26)

m2 = L9110S(32, 33)

car=Car(m1,m2); car.wheel(1, 1)

wlan_ap = network.WLAN(network.AP_IF); wlan_ap.active(True); wlan_ap.config(essid='ESP32_V7RC',password='12341234')

s = UDPServer(); l= uasyncio.get_event_loop(); l.run_until_complete(s.serve(cb, '192.168.4.1',6188))