kopia lustrzana https://github.com/micropython/micropython-lib
70 wiersze
1.8 KiB
Python
70 wiersze
1.8 KiB
Python
import sys
|
|
|
|
# ruff: noqa: E402
|
|
sys.path.append("")
|
|
|
|
from micropython import const
|
|
|
|
import uasyncio as asyncio
|
|
import aioble
|
|
import bluetooth
|
|
|
|
import random
|
|
import struct
|
|
|
|
# org.bluetooth.service.environmental_sensing
|
|
_ENV_SENSE_UUID = bluetooth.UUID(0x181A)
|
|
# org.bluetooth.characteristic.temperature
|
|
_ENV_SENSE_TEMP_UUID = bluetooth.UUID(0x2A6E)
|
|
# org.bluetooth.characteristic.gap.appearance.xml
|
|
_ADV_APPEARANCE_GENERIC_THERMOMETER = const(768)
|
|
|
|
# How frequently to send advertising beacons.
|
|
_ADV_INTERVAL_MS = 250_000
|
|
|
|
|
|
# Register GATT server.
|
|
temp_service = aioble.Service(_ENV_SENSE_UUID)
|
|
temp_characteristic = aioble.Characteristic(
|
|
temp_service, _ENV_SENSE_TEMP_UUID, read=True, notify=True
|
|
)
|
|
aioble.register_services(temp_service)
|
|
|
|
|
|
# Helper to encode the temperature characteristic encoding (sint16, hundredths of a degree).
|
|
def _encode_temperature(temp_deg_c):
|
|
return struct.pack("<h", int(temp_deg_c * 100))
|
|
|
|
|
|
# This would be periodically polling a hardware sensor.
|
|
async def sensor_task():
|
|
t = 24.5
|
|
while True:
|
|
temp_characteristic.write(_encode_temperature(t), send_update=True)
|
|
t += random.uniform(-0.5, 0.5)
|
|
await asyncio.sleep_ms(1000)
|
|
|
|
|
|
# Serially wait for connections. Don't advertise while a central is
|
|
# connected.
|
|
async def peripheral_task():
|
|
while True:
|
|
async with await aioble.advertise(
|
|
_ADV_INTERVAL_MS,
|
|
name="mpy-temp",
|
|
services=[_ENV_SENSE_UUID],
|
|
appearance=_ADV_APPEARANCE_GENERIC_THERMOMETER,
|
|
) as connection:
|
|
print("Connection from", connection.device)
|
|
await connection.disconnected()
|
|
|
|
|
|
# Run both tasks.
|
|
async def main():
|
|
t1 = asyncio.create_task(sensor_task())
|
|
t2 = asyncio.create_task(peripheral_task())
|
|
await asyncio.gather(t1, t2)
|
|
|
|
|
|
asyncio.run(main())
|