Collecting Sensor Data over RS‑485 Modbus with STM32
1. Hardware Overview Sensor: 12 VDC industrial sensor with RS‑485 interface, Modbus RTU protocol Interface design: RS‑485 is half‑duplex; the transceiver must switch between transmit and recieve Direction control can be automated with a hardware auto‑TX enable circuit triggered by the UART TXD start...