M5Stack Base26 Proto Industrial Board Module v1.1, RS485 Addon

Help & Support Robot Parts
1

I purchased the M5Stack Base26 Proto Industrial Board Module v1.1
https://www.robotshop.com/products/m5stack-base26-proto-industrial-board-module-v11
which has an RS485 module that can be mounted.

I can’t seem to find any documents to indicate:

  1. How to Mount it. The sales picture indicates where it goes on the board, but the 3 connection on my M5Stack Core2 (AWS) show that these pins are “NC” (No Connection"). (Other references show “HPWR”)
  2. How does this module communicate with the M5Stack? I2C? SPI?
  3. What are the wiring connections? (is +/-12v required, is the Orange connector used?)
  4. Is there some Example code for the RS485?

I did find this document, but it doesn’t show the RS485 module:
m5-docs

Sir Michael