Digital slave clock for Schneider Electric (aka ESMI, Westerstrand) minute pulse clock system.

Required hardware

• LilyGo T5 4.7" (e-paper display + ESP32 microcontroller)
• Wall with Schneider Electric minute pulse clock system
  • The system has to provide power for at least 2 seconds every minute.
• Power adapter from clock 24V line to USB

How to build (Linux)

• Install Rust.
• Install Rust ESP32 toolchain.
• Clone this repository, including submodules.
• Define LIBCLANG_PATH environment variable that points to your ESP32 libclang directory.
• Connect the microcontroller to your computer via USB.
• Run sudo cargo espflash to compile and write the program to the microcontroller.

How to use

• The project should be built in release mode for it to work on an actual minute pulse signal. E.g., cargo espflash --release
• Adjust time by plugging into a normal USB power supply and using the buttons on the LilyGo unit. The time you set will be shown the next time the unit boots up.
• Just plug the microcontroller to the wall with the adapter and it should work.