I have integrated a Brink Renovent Excellent 300 in openhab in order to monitor filter state and control the amount of airflow in the house. From Brink you get the “Brink Connect” module which allows access to the Renovent 300 via modbus/RS485. I conneced my pi with a USB-RS485 converter to the Bri…

Hello Berndq! Can you give me a more detailed description or a link from your USB-RS-485 converter. I’m also trying to connect my ventilation system to openhab … Best wishes, Michael

Hi Michael, these adapters are cheap and all the same, from the software side of view. Just search the web (or the well known auction house) for USB RS485 adapter. Maybe choose the one with the electrical connectors you prefer to use. On linux they appear as e.g. /dev/ttyUSB0 you the configure the…

Hallo! Yes, my system supports Modbus. I have a Wolf system (CWL-2-400). The ventilation from Wolf (CWL-2-400) is identical to the ventilation from Brink (Flair 400). The Flair 400 ventilation is the successor to the Brink Renovent Excellent 400. Both the CWL-2-400 and Flair 400 now have the Modbus…

[image] Micha1: At the moment I am trying to control the CWL-2-400 via an RS 485 adapter and my Windows 10 PC. I use the CAS Modbus Scanner program. This will be much easier to experiment with to establish how to connect to your CWL. You’d need to get right address, baud, parity, wiring pola…

Hi Michael to check the connection try to read values from the device (e.g. flow rate or a temperature). Writing is a bit more complicated. I did my first tests with modpoll (under linux, mabe it is also available for windows) Reading the supply air temperature: [19:45:16] oh@openHABianPi2:~/mbp…

I am using the first of your adapters.

Hi Bernd, thanks for sharing your experience. I was solving the same issue but with Brink Flair 300 unit and your code helped me a lot. The Modbus params and addresses are different from Renovent Excellent 300 and the Brink Modbus documentation for my unit is poor, but after few hours of experiment…

Hi, I have found this document at Brink, It describes all Modbus addresses for our Flair ventilation systems: https://www.brinkclimatesystems.nl/documenten/modbus-uwa2-b-uwa2-e-installation-regulations-614882.pdf HTH. Kind regards, Xavier Miller

[image] Berndq: Here are my things for the Renovent: Bridge modbus:serial:brink [ port="/dev/ttyUSB0", id=11, baud=9600, dataBits=8, parity="even", stopBits="1" ] { Bridge poller air [ start=4008, length=5, refresh=300000, type="holding" ] { Thing data holding4009 [ readStart="4008…

how do I get this data for my Brink Renovent Excellent 300? not sure if I understand your question. you can use it as is, it’s the same for all Brink Renovent Excellent 300. I figured it out using the manual of the Brink Connect and lots of trial and error with modpoll. details see above. befo…

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Brink Renovent Excellent 300 air ventilation integration

Tutorials & Examples Solutions

RBroks (R Broks) January 9, 2025, 5:17pm 16

Thank you for guide and examples. I can confirm that it works with Brink flair 325. With several small corrections.