Connecting ESP32 to RS485 port of Pool Equipment

[bwze]

I'm curious if anyone might be able to weigh in on if what I'm trying to accomplish is possible with this code.

I have a piece of pool equipment that has an RS485 port to which I currently have a RS485 USB adapter plugged into a RaspberryPi 3b.

On the RP, I'm running another github project https://github.com/tagyoureit/nodejs-poolController that allows me to controlled this device via a dedicated GUI or via Home Assistant.

In this configuration, it works flawlessly but I'm trying to replace the RP with a virtual machine and relay the RS485 bi-direction messages via this stream server component.

I'm using the following yaml code (only the relevant stream server parts are shown) but I can't get the device to respond to either messages sent to of from the pool equipment.

external_components:
  - source: github://oxan/esphome-stream-server

stream_server:
  uart_id: uart_bus

logger:

uart:
  id: uart_bus
  tx_pin: GPIO17
  rx_pin: GPIO16
  baud_rate: 9600
  data_bits: 8
  parity: NONE
  stop_bits: 1
  # rx_buffer_size: 256

binary_sensor:
  - platform: stream_server
    connected:
      name: Connected

sensor:
  - platform: stream_server
    connection_count:
      name: Number of connections

I know the answer is likely "it depends on your use case" but I'm just trying to relay raw RS485 messages and I feel like this project would work great for this need.

[rrooggiieerr]

Enable uart debugging

https://esphome.io/components/uart/#debugging

[bwze]

Gave that a try but still not working. I assume with the various settings given for the debug option, I should see something in the ESP32 device logs but I don't.

[mcurry-va]

If you're half-duplex RS485, you need to specify flow_control_pin on the UART for the DE line.
For reference, I see no issue with this project and RS485.

[nebulous]

likely stream_server will do the right thing once you get the configuration sorted, but this case is eerily similar to the one that caused me to write https://github.com/nebulous/esphome-uart-link - hooking up a thermostat rs485 device directly to a containerized service rather than having intermediate steps.