Case study

TJ-56-654 weather clock: replacement firmware after hardware and security analysis

The TJ-56-654 weather-clock project replaces the original ESP-01S firmware after an investigation of the device's hardware and configuration page. The author reports that the original page exposed the Wi-Fi password; the replacement provides NTP time, Open-Meteo weather, OLED screens, a web settings panel, and updates on the clock's 1 MB flash device.

Targets: Firmware
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 20
Last commit: 2026-11-03
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: A TJ-56-654 or compatible ESP8266 weather clock; first flashing requires a 3.3 V USB-to-serial adapter and jumper wires.
Prerequisites: The installation guide specifies Arduino IDE 1.8.19+ or 2.x and ESP8266 board support.
License: MIT license.

Cite

BibTeX

@misc{esp8266-weather-clock-case,
  title = {{TJ-56-654 weather clock: replacement firmware after hardware and security analysis}},
  howpublished = {\url{https://github.com/petrochen/esp8266-weather-clock-opensource}},
  url = {https://github.com/petrochen/esp8266-weather-clock-opensource},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/esp8266-weather-clock-case/}}
}

Plain text

TJ-56-654 weather clock: replacement firmware after hardware and security analysis. https://github.com/petrochen/esp8266-weather-clock-opensource (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/esp8266-weather-clock-case/

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About this entry

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Primary sources

README.md GitHub · petrochen/esp8266-weather-clock-opensource · Revision 4f3a708
docs/INSTALLATION.md GitHub · petrochen/esp8266-weather-clock-opensource · Revision 4f3a708