Is Evok 2.4.24 fully compatible with Bullseye?

I have one RPI with headless Bullseye and on that one everything seems to work.

I have another RPI with Bullseye and Lightdm on top and on that one relay state change with JSON POST does not work.

Example:

POST http://localhost:8080/json/relay/1
Content-Type: application/json

{
"value": "1"
}

Result:

HTTP/1.1 200 OK
Content-Length: 44
Access-Control-Allow-Methods: POST, GET, OPTIONS
Server: TornadoServer/4.5.3
Date: Wed, 15 Feb 2023 09:48:09 GMT
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: x-requested-with
Content-Type: application/json; charset=UTF-8

{
"status": "success",
"data": {
"result": 0
}
}

The result is "0" and the relay is not switching.

Any idea?

Best regards,

Noël Vaes

The unipi_tcp_server reports the following error:

sudo /opt/unipi/tools/unipi_tcp_server -p 502 -l 127.0.0.1 --verbose --check-firmware

ARMINIT: Cannot open device /dev/unipispi
ARMINIT: Cannot open device /dev/unipispi
ARMINIT: Cannot open device /dev/unipispi
UniPi TCP Modbus Server: Listening Connection Established RET:3
poll timeout = -1[ms]
Starting primary loop

When trying to communicate with the server, errors are reported: Error reading (using EasyModbus Java library).

This is the environment:

I installed raspios_lite_arm64-2020-08-24 on Neuron S103 (RPI4).
The image is available here: https://downloads.raspberrypi.org/raspios_lite_arm64/images/raspios_lite_arm64-2020-08-24/2020-08-20-raspios-buster-arm64-lite.zip

Next I added the Unipi repository the recommended way:

curl https://repo.unipi.technology/debian/README.apt | bash

Subsequently I installed the following modules:

sudo apt install -y unipi-kernel-modules unipi-firmware unipi-firmware-tools unipi-modbus-tools

Finally I run

sudo systemctl stop unipitcp
sudo /opt/unipi/tools/unipi_tcp_server -p 502 -l 127.0.0.1 --verbose --check-firmware