i have a modbus device which uses stm32f030c8 inside it. when i use commands to change baud rate or device address it will work once, but as i power off the device it will lost the baud rate and device address. what is the problem and what should i do?

BMora.2 · ‎2021-12-07

waclawek.jan · ‎2021-12-07

You have to store it in some non-volatile memory: unused page of FLASH, external EEPROM, battery-powered RAM, etc.

JW

BMora.2 · ‎2021-12-07

how i can access that?

i just bought a WaveShare Modbus RTU Relay? i am not the one who is expert in coding STM32

waclawek.jan · ‎2021-12-07

Then you may want to contact WaveShare with your question.

JW