STM32_HAL_FREEMODBUS_RTU FreeMODBUS RTU port for STM32 HAL library http://blog.naver.com/eziya76/220970378890 Reference https://habrahabr.ru/post/279747/ http://ctrl-v.biz/blog/6 http://factory.ergoinventus.net/2016/05/stm32-hal-uart-isq-handler.html