# atc1441/ATC_MiThermometer

Custom firmware for the Xiaomi Thermometer LYWSD03MMC and Telink Flasher via USB to Serial converter

Repository: https://github.com/atc1441/ATC_MiThermometer
Canonical: https://ross.abutalabs.com/products/atc_mithermometer
Language: C
License Family: other
Last push: 2025-01-15T12:16:43+00:00

## Health v2 (maintenance only)
Score: 34/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 1, release rhythm 40, longevity 100
- inputs: {"age_days": 2197, "days_push": 595, "days_rel": 595, "gap_med": 0.0, "n_releases_24m": 7}
- flags: prerelease_only, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3343, forks 621 (observed 2026-08-28T04:07:56.952087+00:00)

## What it is
Custom open-source firmware for the Xiaomi LYWSD03MMC Bluetooth thermometer/hygrometer, plus a web-based Telink OTA flasher and a Python USB-to-UART flashing tool. It replaces the stock firmware to enable custom BLE broadcasts and reflashable updates.

## Use cases
- flash custom firmware on Xiaomi LYWSD03MMC thermometer
- unbrick a Telink-based thermometer via USB to UART
- get temperature and humidity readings over BLE for home automation
- reflash stock firmware back onto a Xiaomi sensor
- OTA update Telink TLSR82xx devices from a browser

## When to choose
- you own a LYWSD03MMC and want open BLE data without Xiaomi cloud
- you need to recover or unbrick a Telink-based sensor
- you want a browser-based OTA flashing tool for Telink MCUs

## When to avoid
- you need non-volatile storage and advanced power management - consider pvvx's fork instead
- your device is not a Telink TLSR82xx-based sensor
- you want a supported, licensed project - this repo has no license

## Facets
- artifact type: application
- maturity: active
- function: embedded, iot
- domain: iot, embedded-systems, hardware
- platform: embedded, iot
- tags: custom-firmware, xiaomi-thermometer, telink, ble, ota-flashing, temperature-sensor, home-automation, web-server

## Member repositories
- atc1441/ATC_MiThermometer (main) score 34

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:56.952087+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:41:02.660554+00:00, confidence not recorded.
  - readme: https://github.com/atc1441/ATC_MiThermometer (fetched 2026-08-28T04:07:56.952087+00:00, sha 89e1e569cf23)
- Data as of 2026-08-30T08:39:29.467469+00:00.