I own a JL1N-20MR (supposedly FX1N-20MR clone) based on STM32F103RCT6 CPU.
I figured that I might be able to re purpose this PLC for home automation by altering it's firmware to use something more IOT oriented. Do this instead of creating my own hardware design since this board has everything I need.
I don't have experience in hardware reverse engineering, nor in programming STM32. However I am experienced programmer with reasonable understanding of electronics. I did a number of successful embedded hardware/software projects in the past.
I am searching for hardware documentation or anything that could help me start working with this board.