Bus Interface¶
The RS485 interface of the W-Modbus module consist of 4 digital signals:
UART_TXD, UART_RXD, RS485_RE and RS485_DE. They can be used to interface
an RS485 driver. For details on how to connect an RS485 driver IC, see the
module page.
NOTE: Signals on the RXD pin must NOT exceed VDD! For 5V
logic, a level shifting circuit must be used!