95 lines
3.1 KiB
Python
95 lines
3.1 KiB
Python
# This file is part of the MicroPython project, http://micropython.org/
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#
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# The MIT License (MIT)
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#
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# Copyright (c) 2017 Glenn Ruben Bakke
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE
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from board import LED
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from machine import RTCounter, Temp
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from ubluepy import Service, Characteristic, UUID, Peripheral, constants
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def event_handler(id, handle, data):
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global rtc
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global periph
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global serv_env_sense
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global notif_enabled
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if id == constants.EVT_GAP_CONNECTED:
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# indicated 'connected'
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LED(1).on()
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elif id == constants.EVT_GAP_DISCONNECTED:
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# stop low power timer
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rtc.stop()
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# indicate 'disconnected'
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LED(1).off()
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# restart advertisment
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periph.advertise(device_name="micr_temp", services=[serv_env_sense])
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elif id == constants.EVT_GATTS_WRITE:
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# write to this Characteristic is to CCCD
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if int(data[0]) == 1:
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notif_enabled = True
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# start low power timer
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rtc.start()
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else:
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notif_enabled = False
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# stop low power timer
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rtc.stop()
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def send_temp(timer_id):
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global notif_enabled
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global char_temp
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if notif_enabled:
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# measure chip temperature
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temp = Temp.read()
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temp = temp * 100
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char_temp.write(bytearray([temp & 0xFF, temp >> 8]))
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# start off with LED(1) off
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LED(1).off()
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# use RTC1 as RTC0 is used by bluetooth stack
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# set up RTC callback every 5 second
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rtc = RTCounter(1, period=50, mode=RTCounter.PERIODIC, callback=send_temp)
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notif_enabled = False
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uuid_env_sense = UUID("0x181A") # Environmental Sensing service
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uuid_temp = UUID("0x2A6E") # Temperature characteristic
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serv_env_sense = Service(uuid_env_sense)
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temp_props = Characteristic.PROP_NOTIFY | Characteristic.PROP_READ
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temp_attrs = Characteristic.ATTR_CCCD
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char_temp = Characteristic(uuid_temp, props=temp_props, attrs=temp_attrs)
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serv_env_sense.addCharacteristic(char_temp)
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periph = Peripheral()
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periph.addService(serv_env_sense)
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periph.setConnectionHandler(event_handler)
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periph.advertise(device_name="micr_temp", services=[serv_env_sense])
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