Example: 50-Arduino-Boards/Nano-33-BLE-Sense/10-Bluetooth/ble_temperature.py

# 本作品采用MIT许可证授权。
# 版权所有 (c) 2013-2023 OpenMV LLC。保留所有权利。
# https://github.com/openmv/openmv/blob/master/LICENSE
#
# BLE 温度传感器示例。

import time
from hts221 import HTS221
from board import LED
from machine import Pin, I2C
from ubluepy import Service, Characteristic, UUID, Peripheral, constants


def event_handler(id, handle, data):
    global periph, service, notif_enabled

    if id == constants.EVT_GAP_CONNECTED:
        # 指示“已连接”
        LED(1).on()
    elif id == constants.EVT_GAP_DISCONNECTED:
        # indicate 'disconnected'
        LED(1).off()
        # 重新启动广告
        periph.advertise(device_name="Temperature Sensor", services=[service])
    elif id == constants.EVT_GATTS_WRITE:
        # 写入此特征即写入CCCD。
        if int(data[0]) == 1:
            notif_enabled = True
        else:
            notif_enabled = False


# 开始时LED(1)关闭
LED(1).off()

notif_enabled = False
uuid_service = UUID("0x181A")  # 环境感知服务
uuid_temp = UUID("0x2A6E")  # 温度特征

service = Service(uuid_service)
temp_props = Characteristic.PROP_READ | Characteristic.PROP_NOTIFY
temp_attrs = Characteristic.ATTR_CCCD
temp_char = Characteristic(uuid_temp, props=temp_props, attrs=temp_attrs)
service.addCharacteristic(temp_char)

periph = Peripheral()
periph.addService(service)
periph.setConnectionHandler(event_handler)
periph.advertise(device_name="Temperature Sensor", services=[service])

bus = I2C(1, scl=Pin(15), sda=Pin(14))
try:
    hts = HTS221(bus)
except OSError:
    from hs3003 import HS3003

    hts = HS3003(bus)

while True:
    if notif_enabled:
        temp = int(hts.temperature() * 100)
        temp_char.write(bytearray([temp & 0xFF, temp >> 8]))
    time.sleep_ms(100)