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Hello @HPC,
I am not sure if I understand the problem. Can you please specify what is connected to what on via which protocol / interface?

Thank you and have a nice day,
Martin

Hello @wzp, we don't have such thing, but you can find STEP models or CAD drawings for our products in the download section: https://kb.unipi.technology/en:files:products:00-start

Best regards,
Martin

Hello @marioverhaeg,

I have replied you on your email - please provide us with more info. Then, I copy the right solution to this topic.

Hi @lukas009,
it is the same issue. We will release Bullseye OS images once the support for all products is done. Looks like it could be next month.

Best regards,
Martin

Hi @knebb,
we are currently working on the Bullseye packages for the Unipi PLCs, but some important are still missing. The official release from our side will be after the official release of the RaspberryPI OS.

Best regards,
Martin

Hi @knebb,
you have verified, that the HW is working and returns correct value via standard tool. Checking and fixing your code is unfortunately beyond the scope of the free support.

Thank you for understanding and have a nice day,
Martin

Hi @knebb,
the firmware has been updated on our Knowledge Base as well: https://kb.unipi.technology/en:files:products:05-sensors:iaq

Martin

Hi @knebb,
yes, the firmware is indeed outdated. My colleague is going to fix this as soon as he gets back from holiday.

Thank you for your patience and have a nice day,
Martin

Hi @knebb,
here's a working mbpoll example reading a temperature:

root@mkudlacek:~# mbpoll 192.168.218.249 -a 1 -0 -1 -r 0 -c 2 -t 3:hex
mbpoll 1.4-25 - FieldTalk(tm) Modbus(R) Master Simulator
Copyright © 2015-2019 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.

Protocol configuration: Modbus TCP
Slave configuration...: address = [1]
                        start reference = 0, count = 2
Communication.........: 192.168.218.249, port 502, t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, input register table

-- Polling slave 1...
[0]:    0x41AD
[1]:    0x05FD

The problem is probably in the slave address. You probably use "0" (modbus_set_slave(modbus, 0)), but it is "1".

Best regards,
Martin

@knebb Try running it on lower voltage, or put another resistor in series and do the recalculation in the software.

Martin