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RS 485 Modbus Protocol

Question asked by bharti sharma on Sep 14, 2017
Latest reply on Sep 14, 2017 by Clive One

My question is regarding RS485 Modbus protocol I am using STM32F030 Nucleo board for communication with RS485 board two USART is used (USART1 AND usart2) for communication purpose I am sending data USART2 (ST-KIT) to USART1 (laptop)one GPIO pin is used for driver/receiver enable when GPIO pin is high data will transmit and when it is low then data will receive  I am fresher and unable to write code so please guide me with example