Home Automation Domotica Forum Europe, Bwired Forum

Posted: **Wed Dec 22, 2021 11:30 am**

Hello,

good people, I am looking for some help.

Hardware setup:
1) OTGW as per: https://www.domoticaforum.eu/viewtopic. ... 816#p83670
2) Connected via USB to a Raspberry Pi 2 Model B Rev 1.1
3) Firmware: 5.1
4) otmonitor latest release as per: http://otgw.tclcode.com/download.html#utilities

The setup seems to generally work - however there are two issues:

1) Once in a while, garbled characters appear in the message log:

Code: Select all

08:07:26.317114  T00120000  Read-Data   CH water pressure: 0.00
08:07:26.692215  B60120000  Data-Inv    CH water pressure: 0.00
08:09:39.314946  OpenTèOpenTherm Gateway 5.1
08:09:39.849861  T10100A00  Write-Data  Room setpoint: 10.00
08:13:18.562804  ÂD01OpenTherm Gateway 5.1
08:13:19.107584  T00060000  Read-Data   Remote parameter flags: 00000000 00000000
08:14:10.308148  BC0060707OpenTherm Gateway 5.1Read-Ack  Remote parameter flags: 00000111 00000111
08:14:10.929511  T801C0000  Read-Data   Return water temperature: 0.00
08:15:07.171046  B401ÿOpenTherm Gateway 5.1
08:15:07.755978  T10181E1C  Write-Data  Room temperature: 30.11
08:15:08.149806  BD0181E1C  Write-Ack   Room temperature: 30.11
08:15:58.975463  OpenTherm Gateway 5.1
08:15:59.562786  T80001300  Read-Data   Status: 00010011 00000000
08:15:59.889181  B40001322  Read-Ack    Status: 00010011 00100010
08:16:24.912759  OpenTherm Gateway 5.1
08:18:03.536337  BD07Å0ÿÏŸðÉnTøOpenTherm Gateway 5.1

2) The setup does not react to any serial commands

Code: Select all

10:21:44.056213  Command: PR=M
10:21:44.104255  B50829üOpenTherm Gateway 5.1Write-Ack Message ID 130: 9
10:21:44.471934  T80001300  Read-Data   Status: 00010011 00000000
10:21:52.533889  Command (via websocket): PS=1
10:21:52.581171  BCOpenTherm Gateway 5.1
10:22:12.796233  BC0060707
OpenTherm Gateway 5.1Read-Ack  Remote parameter flags: 00000111 00000111
10:22:13.330103  T80001300  Read-Data   Status: 00010011 00000000

It seems, that the data from the Thermostat (slave) is received ok and transmitted ok to the boiler (master).
It also seems, that any command sent to the gateway is not accepted - or that the master communication is not picked up correctly?

Any pointer will be helpful!

Thanks a ton!

Posted: **Wed Dec 22, 2021 1:57 pm**

You completely seem to ignore the fact that the OTGW frequently resets. If you would be able to run the PR=Q command, I suspect it will respond with PR: Q=B, meaning a brown-out condition has happened. Maybe you can run the command if you disconnect the thermostat.

If my suspicion is correct, you probably have the issue described here. Long story short: Use a good quality USB cable to power the OTGW.

Posted: **Wed Dec 22, 2021 4:05 pm**

Hi Schelte,

yes, you were correct. I created a much more solid power connection and now, it seems to work.

I was wondering about the "OpenTherm Gateway 5.1" messages. I take it now, that this means reset.

Thanks for the fast help!

Home Automation Domotica Forum Europe, Bwired Forum

otmonitor - once in a while garbled characters

otmonitor - once in a while garbled characters

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