I’ve seen people asking about support for Flexit ventilation systems, with some fairly complicated modbus solutions as options, but I haven’t seen any attempt at creating a Flexit Homey app. I’ve read that Flexit’s own system, Flexit Go, is a closed app and api and they’re not sharing any informatio…

[image] kvolden: but I haven’t seen any attempt at creating a Flexit Homey app. Well I found it in 6.77 sec :wink::saluting_face: [image] Flexit Nordic S4 modbus communication This is possible. Tom Heine has made an app to do this with a TCP-modbus konverter (webpage in Norwegian, any bro…

[image] Peter_Kawa: Well I found it in 6.77 sec :wink::saluting_face: Yeah but that’s exactly what I was referring to in the part of the sentence that wasn’t included in your quote. What I haven’t found is an attempt to create a Flexit Homey app that does not rely on modbus and cumbersome CLI…

Oh , I’m so sorry, I think in solutions :wink: The only thing missing is “the app store”, but that’s just a GUI to CLI. At least there IS a Homey app, and CLI install might be easier than you expect. Plus there’s enough forum users who can help you out, just ask when you get stuck.

Thanks, but you are assuming that what I’m really asking for is help to get it working. I’m not. I don’t expect CLI installation to be difficult, and I don’t expect the rest of the process to be so difficult that I would need assistance. I just don’t like the solution. First you need to buy the mod…

[image] kvolden: reverse engineered the Flexit Go api by decompiling android apps It depends on how the app authenticates. Some smart home apps sign or encrypt requests before they leave the phone. This way, an interception tool like HTTP Toolkit can only view encrypted data. In this case, it…

Yeah, it definitely isn’t guaranteed to work, but sometimes you can sort of piece things together. I’ve been using a combination of Android app decompilation and HTTP Toolkit to reverse engineer some waste management data fetches for various providers in another Homey app I made. Some were not succe…

I also used HTTP Toolkit with Android emulator (Frida interception method) for multiple apps, such as Duux Gen2 and HomeWizard Link. But the larger apps like Tuya all use encryption. Do you also have the device? If you don’t, you can also install the app on your emulator and then create an account.…

Thanks. I don’t have the device, no. As mentioned above, the device appears to be somewhat of a default option when building our new house, and I may end up with one in the future. Just to be clear, even though I appreciate the tip, I’m not asking for help to reverse engineer the api. I am asking if…

Would love to see a app for Flexit that don’t require Modbus/CLI. I have a Flexit Nordic S4 which I currently control using the Android version of the Flexit GO app. Let me know if I can be of any help with testing etc. if someone decides to have a go at making an app.

As it happens, I have been testing a BACnet-based Flexit app and I have successfully: Added discovery of devices on the local network. Setting the Home temperature setpoint. Keeping the set point updated should one e.g change the settings in the Flexit GO app. Still very rough, but at least confi…

Flexit Nordic (BACnet)

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Peter_Kawa January 24, 2026, 4:53pm 2

Well I found it in 6.77 sec

CLI = command line install
How to CLI:

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Flexit Nordic (BACnet)

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