RS485 Setup basics with Pi and Building Automation Hat

[carracc]

Hey all sorry for the basic question. I am trying to get my hayward tristar vs 950 pump connected to my nixie standalone system via rs485 connection via building automation hat on a raspberry pi. Any help would be greatly appreciated!

I am directly wiring the 3 wires from pump (A,B, and Ground) directly to the Building auto Card rs485 port. I have set jumpers all down on pump and believe all connections are clean and secure.

I setup my building automation hat to have:

• jumpers to enable the rs485 port (both rx and tx),
• sent command to release control of the rs485 from the building automation card controller.
  • ~$ megabas [0] rs485wr 0 0 0 0 0

I then try to setup in REM and Nixie

• Enabled rs485 in REM like attached photo
• 
• I try to enable port in Nixie but I get the error in the second photo
• 

 

[PoolStored]

You are swimming in the deep end of DIY automation...of which there are few here...

Maybe a bump will help...

 

[carracc]

Thanks mate
!

 

[Katodude]

You should only use 2 wires for the RS-485. A and B. Also try reversing them.

In your Raspi-config. Make sure I2C is enabled, Serial port is enabled, and SPI is disabled.