Waveshare Rs485 to POE ETH(B) - flash write error!
EDIT - Sorted itself out....not sure how.

I am definitely a beginner here.

I have a KH9.9 and have wired up a Waveshare Modbus adapter using POE.

I have the Modbus connected to a POE switch which is then connected to my Eero router.

When connected using POE, the power light on the WS is bright red. If I disconnect the ethernet cable and power the WS with a usb cable connected to a power socket, the power light is less bright.

With POE connected, I get a very faint yellow light on LINK. THe device is visible on Vircom.

My issue seems to be arising when I try to update the BIN file. I get a "flash wirte" error.

Any thoughts?

I've checked the wiring and pins and all seems fine.
Attachments:
Screenshot 2026-06-17 210323.png
USB cable powered
USB cable powered
POE power
POE power