Bus Interface¶
UART¶
The UART interface of the W-BACnet module consist of 4 digital signals (UART_TXD, UART_RXD, RS485_RE, RS485_DE) that can be used to interface a RS485 driver. Please refer to the pins on the module page for details on how to connect an RS485 driver IC.
NOTE: Signals on the RXD pin must NOT exceed VDD! For 5V logic, a level shifting circuit must be used!