android 下需先安裝 BLE Scanner app，觀看時請按 notify 才會及時更新數值

# 範例十八:

# 用手機 BLE Scanner app 來觀看 ESP32 溫度

# 手機需安裝 BLE Scanner app

# 需要的 module : ble_uart，tools，const

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

import ubluetooth as bt

from ble_uart import BLEUART

from tools import BLETools

from const import BLEConst

from machine import Pin

import esp32

from time import sleep

def rx_callback(data):

print((data))

if (data) == (b'on'):

Pin(12, Pin.OUT).value(1)

if (data) == (b'off'):

Pin(12, Pin.OUT).value(0)

ble = bt.BLE(); uart = BLEUART(ble, rx_callback,name="esp32_sender")

while True:

uart.send((str((((esp32.hall_sensor()-32.0)/1.8))))+'')

sleep(1)