Stm32 Modbus Rs485. reception and transmission work correctly, but the RTS pin does not s

reception and transmission work correctly, but the RTS pin does not switch. Modular design for integrating into existing STM32 CubeIDE or other IDE-based workflows. RS-485 supports several connection types, including DB-9 and DB-37. The RTS pin was pressed to the ground when I launched the application and released when I closed the application. STM32-RS485-modbus-master-slave-controller STM32- based RS-485-enabled modbus master+slave compound device The device receives multiple input signals (analog, 4-20 mA current loop and logic, 0/10 V logic level) and NMEA data from GPS module. when transmitting the pin is set to high . STM32 as Modbus master reads coils & discrete inputs using FC01/FC02: send request, parse response, and extract bit values via UART RS-485. Supports network transport (Modbus TCP) and Serial line/RS-485 (Modbus RTU). I use ADM2682 as transceiver and VAQE6W-Q24-S12-D as isolated DC-DC converter. modbus协议简介： modbus协议基于rs485总线，采取一主多从的形式，主设备轮询各从设备信息，从设备不主动上报。 日常使用都是RTU模式，协议帧格式如下所示： 地址 功能码 寄存器地址 读取寄存器个数 寄存器数据1 . bc6pa8uo1kc
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