ATC_MiThermometer
The custom firmware can be flashed via a modern browser and over-the-air (OTA) without opening the device and unlocks several customization options.
- Custom firmware
- Stable
- Medium brick risk
- Reversible
Source codeWebsite: github.com
This project hasn't been claimed by its maintainer yet, so its details come from the community. Is it yours? Claim it
- Fix SHTC3
Before you start
- How hard is it?
- EasyCopy a file or use a web page. No extra software.
- What you need
- Comfort with the command line
- Can it break my device?
- Small chance of trouble, with a way to recover.
- Can I undo it?
- Yes. You can go back to the official software.
Did it work for you?
Did ATC_MiThermometer v5.7 work on your Xiaomi LYWSD03MMC?
No reports yet for v5.7.
One-tap reports from owners. Bricked reports are checked before they count.
Compatibility
Devices: Xiaomi LYWSD03MMC.
No compatibility information yet.
Getting started
From the project's README ("Getting Started"):
You can conveniently flash, update and configure the bluetooth thermometers remotely using a bluetooth connection and a modern web browser.
Flashing or Updating the Firmware (OTA)
To flash or update the firmware, use a Google Chrome, Microsoft Edge or Opera Browser.
- Go to the Over-the-air Webupdater Page TelinkMiFlasher.html
- If using Android, Windows, Linux: Ensure you enabled "experimental web platform features". Therefore copy the according link (i.e. chrome://flags/#enable-experimental-web-platform-features for Chrome), open a new browser tab, paste the copied URL. Now sten the Experimental Web Platform features flag to Enabled. Then restart the browser.
- For all sensors with a button, before activation, it is necessary to reset the past bindings by holding the button for a long time.
- In the Telink Flasher Page: Press Connect: The browser should open a popup with visible Bluetooth devices. Choose the according target device (i.e. LYWSD03MMC) to pair.
- After connection is established a Do Acivation button appears. Press this button to start the decryption key process.
- Now you can press the Custom Firmware ver x.x button to directly flash the custom firmware. Alternatively you can choose a specific firmware binary (i.e. the original firmware) via the file chooser
- Press Start Flashing.
Use TelinkOTA to flash old or alternative versions (ATC1441). This is a program for OTA projects with Telink SDK, no third-party (mijia) protections. …
Risk and recovery
- Brick risk
- Medium
- Reversible
- Yes
- Requires opening the device
- No
From the project's README ("Firmware Binaries"):
You can directly update/flash the firmware without downloading the binaries below.
Custom Firmware Versions:
The download of the appropriate firmware for your device will be presented automatically in TelinkMiFlasher.html. Downloading files from this repository is not required.
BLE OTA bin firmware files Zigbee OTA firmware files for recovery in BLE
Original Manufacturer Firmware Version
In case you want to go back to the original firmware, you can download them here:
Xiaomi LYWSD03MMC Original Firmware v1.0.00109 (HW: B1.4 only) Xiaomi LYWSD03MMC Original Firmware v1.0.00130 (HW: B1.4..B2.0) Xiaomi MJWSD05MMC(ch) Original Firmware v2.0.00026 (HW: V2.3) Xiaomi MJWSD05MMC(en) Original Firmware v2.0.00005 (HW: V2.3) MiaoMiaoCe Technology (Beijing) Co., Ltd. MHO-C122 Original Firmware (Tuya) Xiaomi MHO-C401 Original Firmware v1.0.00010 Xiaomi and Azarton MHOC401 Original Firmware v1.0.00016 Xiaomi SJWS01LM Original Firmware v1.1.10018 Qingping CGG1-M 2020-2021 Original Firmware v1.0.10093 Qingping CGG1-M 2022 Original Firmware v2.2.1 Qingping CGPR1 Original Firmware v1.1.10228 Qingping CGDK2 Original Firmware v1.1.10210 Qingping CGDK2 Original Firmware v1.1.10217 Qingping CGDK2 Original Firmware v1.1.10223 Zigbee TH03
Releases
| Version | Name | Released |
|---|---|---|
| v5.7 | —Latest | 21 March 2026 |
| v5.5 | — | 1 December 2025 |
| v5.4 | — | 21 October 2025 |
| v5.3 | — | 7 July 2025 |
| v5.2 | — | 11 June 2025 |
| v5.1 | — | 16 April 2025 |
| v5.0 | — | 11 February 2025 |
| v4.9 | — | 28 December 2024 |
| v4.8 | — | 6 November 2024 |
| v4.7 | — | 17 June 2024 |
| v4.6 | — | 13 December 2023 |
| v4.5 | — | 12 November 2023 |
| v4.4 | — | 20 October 2023 |
| v4.3 | — | 19 June 2023 |
| v4.2 | — | 18 March 2023 |
| v4.1 | — | 17 February 2023 |
| v3.9 | — | 14 January 2023 |
| v3.8 | — | 27 November 2022 |
| v3.7 | — | 11 May 2022 |
| v3.6 | — | 4 March 2022 |
| v3.5 | — | 16 February 2022 |
| v3.4 | — | 27 November 2021 |
| v3.3 | — | 6 November 2021 |
| v3.2 | — | 13 August 2021 |
| v3.1 | — | 9 May 2021 |
| v2.6 | — | 9 March 2021 |
| v2.3p | — | 21 February 2021 |
| v2.1 | — | 13 February 2021 |
| v1.4 | — | 22 January 2021 |
| V1.1 | first release | 9 January 2021 |