The PCB we make will control the current with 8 bits, use a PIC24F16KA controller, and a MCP7940 real time clock.
A five-pin header is provided (P2) for programming the PIC.
This should be sufficient to prove that the concept works.
Next, I intend to add an I2C flash memory to the bus.
Then add control for a blue LED (for lunar).
Then, USB ...
Then, Bluetooth, so one board can control many.