Add Bluetooth Thermometer Monitoring

[RChadwick7]

Those cheap $4 bluetooth thermometers are great for dry boxes, and when you install updated firmware they are very easy to read.

[LazeMSS]

I don't have that hardware so it's kinda hard to make it but I'm guessing you could probably get the data using a script. Do you have a link for the hardware you are using?

[RChadwick7]

This is a link that describes the open-source firmware. The device itself is available on Aliexpress or Ebay. I bought 3 for $12 including shipping. They are pretty accurate, and the new firmware was extremely easy to flash.

https://hackaday.com/2020/12/08/exploring-custom-firmware-on-xiaomi-thermometers/

[LazeMSS]

Well basically you can just do it yourself - write that code below (from your link) and put it file called bttemp.py - and run it as a custom command with a grep command or you could make it easier and modify it like below - then it will only return the temperature.

`#!/usr/bin/env python3 import sys from datetime import datetime import bluetooth._bluetooth as bluez

from bluetooth_utils import (toggle_device, enable_le_scan, parse_le_advertising_events, disable_le_scan, raw_packet_to_str)

Use 0 for hci0

dev_id = 0 toggle_device(dev_id, True)

try: sock = bluez.hci_open_dev(dev_id) except: print("Cannot open bluetooth device %i" % dev_id) raise

Set filter to "True" to see only one packet per device

enable_le_scan(sock, filter_duplicates=False)

try: def le_advertise_packet_handler(mac, adv_type, data, rssi): data_str = raw_packet_to_str(data)

Check for ATC preamble

    if data_str[6:10] == '1a18':
        temp = int(data_str[22:26], 16) / 10
        hum = int(data_str[26:28], 16)
        batt = int(data_str[28:30], 16)
        print("%sc" % \
             (mac))

# Called on new LE packet
parse_le_advertising_events(sock,
                            handler=le_advertise_packet_handler,
                            debug=False)

Scan until Ctrl-C

except KeyboardInterrupt: disable_le_scan(sock)`

Im closing this because adding in code hardware support for hardware that I dont own and can't easy buy is out of scope and there is an easy fix as highlighted above