RS232, RS485, and RS422 are based on different voltage levels, impedance, and signaling modes. RS232 uses single-ended signaling, which means that each wire carries a voltage relative to a common ...

The SN65HVD70 is a RS485 device that should work identically to the MAX485. RXEN and TXEN can be controlled independently by initializing like this: Modbus master(0, 1, TXEN_PIN, RXEN_PIN); In ...