Govee 5072 Bluetooth LE

govee.py

#!/usr/bin/env python3

# Taken from: https://github.com/Thrilleratplay/GoveeWatcher/blob/master/python/goveeWatcher.py
# Tested with Govee Temp/Humidity BT LE (model 5072)

from time import sleep
import os
import sys

from bleson import get_provider, Observer, UUID16
from bleson.logger import log, set_level, ERROR, DEBUG

# Disable warnings
set_level(ERROR)

# # Uncomment for debug log level
# set_level(DEBUG)

# https://macaddresschanger.com/bluetooth-mac-lookup/A4%3AC1%3A38
# OUI Prefix	Company
# A4:C1:38	Telink Semiconductor (Taipei) Co. Ltd.
GOVEE_BT_mac_OUI_PREFIX = "A4:C1:38"

H5075_UPDATE_UUID16 = UUID16(0xEC88)

govee_devices = {}

# ###########################################################################
FORMAT_PRECISION = ".2f"

# Decode Temperature into degrees Celcius
def decode_temp_in_c(encoded_data):
    return format((encoded_data / 10000), FORMAT_PRECISION)


# Decode Temperature into degrees Fahrenheit
def decode_temp_in_f(encoded_data):
    return format((((encoded_data / 10000) * 1.8) + 32), FORMAT_PRECISION)


# Decode percent humidity
def decode_humidity(encoded_data):
    return format(((encoded_data % 1000) / 10), FORMAT_PRECISION)


def print_values(mac):
    govee_device = govee_devices[mac]
    print(
        f"{govee_device['name']} ({govee_device['address']}) - \
Temperature {govee_device['tempInC']}C / {govee_device['tempInF']}F  - \
Humidity: {govee_device['humidity']}% - \
Battery:  {govee_device['battery']}%"
    )


def print_rssi(mac):
    govee_device = govee_devices[mac]
    print(
        f"{govee_device['name']} ({govee_device['address']}) - \
RSSI: {govee_device['rssi']}"
    )


# On BLE advertisement callback
def on_advertisement(advertisement):
    log.debug(advertisement)

    if advertisement.address.address.startswith(GOVEE_BT_mac_OUI_PREFIX):
        mac = advertisement.address.address

        if mac not in govee_devices:
            govee_devices[mac] = {}
        if H5075_UPDATE_UUID16 in advertisement.uuid16s:
            # HACK:  Proper decoding is done in bleson > 0.10
            name = advertisement.name

            encoded_data = int(advertisement.mfg_data.hex()[6:12], 16)
            battery = int(advertisement.mfg_data.hex()[12:14], 16)
            govee_devices[mac]["address"] = mac
            govee_devices[mac]["name"] = name
            govee_devices[mac]["mfg_data"] = advertisement.mfg_data
            govee_devices[mac]["data"] = encoded_data

            govee_devices[mac]["tempInC"] = decode_temp_in_c(encoded_data)
            govee_devices[mac]["tempInF"] = decode_temp_in_f(encoded_data)
            govee_devices[mac]["humidity"] = decode_humidity(encoded_data)

            govee_devices[mac]["battery"] = battery
            print_values(mac)
        if advertisement.rssi is not None and advertisement.rssi != 0:
            govee_devices[mac]["rssi"] = advertisement.rssi
            print_rssi(mac)

        log.debug(govee_devices[mac])


# ###########################################################################


adapter = get_provider().get_adapter()

observer = Observer(adapter)
observer.on_advertising_data = on_advertisement

try:
    while True:
        observer.start()
        sleep(2)
        observer.stop()
except KeyboardInterrupt:
    try:
        observer.stop()
        sys.exit(0)
    except SystemExit:
        observer.stop()
        os._exit(0)