Wiring

The following wiring should be correct for RS422 to RS422

RS422 pin RS422 alias target alias target
Y TXD+ RXD- A
A RXD- TXD+ Y
Z TXD- RXD+ B
B RXD+ TXD- Z

this probably wrong or not P2P type

  • Y = TXD+ — B = RXD+
  • Z = TXD- — A = RXD-
  • B = RXD+ — Y = TXD+
  • A = RXD- — Z = TXD-
RS422 pin RS422 alias target alias target
Y TXD+ RXD+ B
Z TXD- RXD- A
B RXD+ TXD+ Y
A RXD- TXD- Z

Use with arduino

ref

https://en.wikipedia.org/wiki/RS-422 https://www.omega.com/en-us/resources/rs422-rs485-rs232

Demo video

  • please refer to ESP32-ISO board