# \[APP\]\[Pro\] Viessmann - Make your heating smart **URL:** \ **Category:** Apps\ **Tags:** app, homey-pro, community-app\ **Created:** [September 26, 2024, 12:33pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744 "2024-09-26T12:33:22Z")\ **Posts on this page:** 17\ **Page:** 18
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [September 8, 2026, 9:40am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/346 "2026-09-08T09:40:53Z")
Hey Michiel, You can send it to my support address: km.support.homey@functor.be kind regards, Kenny ---
**Author:** ![Claude\_Carnot](https://avatars.discourse-cdn.com/v4/letter/c/ac8455/32.png) [@Claude\_Carnot](https://community.homey.app/u/Claude_Carnot)\ **Post date:** [September 18, 2026, 8:23am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/347 "2026-09-18T08:23:57Z")
Hi Kenny, I have the same problem (empty metrics for my vitocal 222S-) is there a way to improve this situation ? all of the metrics colored are empty ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/5/a536ea6e3f3009604c9bd1fd14a4cd33a0cb3040.png) ---
**Author:** ![Sam\_Coussens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sam_coussens/32/79498_2.png) [@Sam\_Coussens](https://community.homey.app/u/Sam_Coussens)\ **Post date:** [October 21, 2026, 12:24pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/348 "2026-10-21T12:24:04Z")
Beste, Ik gelijk deze app al enige tijd zonder problemen. De connectie met Vicare loopt naadloos. Ik vroeg echter volgende zaken af: - Kan ik de startpagina instellen? Bij mij opent de warmwatertemperatuur altijd. Ik zou liever de “Heating Thermostat” bekomen. - Kan ik het toestel toevoegen aan klimaat binnen Homey? Nu ben ik daar nog niet in geslaagd. ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [October 23, 2026, 11:48am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/349 "2026-10-23T11:48:54Z")
Hey, De startpagina is bepaald door Homey zelf, we kunnen dat niet regelen of aanpassen. Het toestel toevoegen binnen klimaat moet ik bekijken of ik daar controle op kan hebben, maar dat gaat een app wijziging zijn als dat mogelijk is. Mvg, ---
**Author:** ![hubo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hubo/32/79549_2.png) [@hubo](https://community.homey.app/u/hubo)\ **Post date:** [October 23, 2026, 1:45pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/350 "2026-10-23T13:45:05Z")
Hi Kenny, I had a problem to communicate with my Vitodense B0HA-19 in Homey, so I have removed the old client and created a new one, set new Client ID and I am still getting error: Client authentication failed. I have sent a diagnostic report: 3033d54b-7346-4efe-8e75-f9e50bebef56 Please look at the issue. Thank you. ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [October 24, 2026, 5:34am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/351 "2026-10-24T05:34:04Z")
Hey @hubo The diagnostics report doesn’t tell me more, beside what you already see 🙂 There is an authentication error for the VIessmann API, did you enter the new Client ID in the settings? Did you try to restart the app? Kind regards, ---
**Author:** ![hubo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hubo/32/79549_2.png) [@hubo](https://community.homey.app/u/hubo)\ **Post date:** [October 24, 2026, 8:07am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/352 "2026-10-24T08:07:20Z")
Yes, I have entered the new Client ID in the settings, but I didn’t restart the app. Now, after the app restart, I have sent you new report: 610beec9-db40-4b57-bed6-7b67d9e50ff2 Now I am getting “Invalid grant” error after the restart. ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [October 26, 2026, 11:49am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/353 "2026-10-26T11:49:20Z")
@hubo - do the suggestions from [[App][Pro] Viessmann App for Homey Pro - #343 by KennyMoens](https://community.homey.app/t/app-pro-viessmann-app-for-homey-pro/116744/343) help out? ---
**Author:** ![hubo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hubo/32/79549_2.png) [@hubo](https://community.homey.app/u/hubo)\ **Post date:** [October 26, 2026, 12:10pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/354 "2026-10-26T12:10:45Z")
After changing the Client ID in app settings, I had to restart the app. After restart I am getting “Invalid grant” error. I have tried to restart the whole process. Removed the device, removed the Client ID, created new one, set it in the settings, restart the app, but no change. Still getting “Invalid grant” for getting installations.json or when trying to add a new Viessmann device to Homey. ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [October 27, 2026, 5:45am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/355 "2026-10-27T05:45:24Z")
Hey @hubo Grmbl. What if you repair the device when you get the “invalid grant”? Thanks, ---
**Author:** ![hubo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hubo/32/79549_2.png) [@hubo](https://community.homey.app/u/hubo)\ **Post date:** [October 27, 2026, 8:08am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/356 "2026-10-27T08:08:22Z")
Repairing the old (no longer running) Viessmann boiler has fixed the issue. After that I was able to get installations.json in settings and add a new device. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [October 29, 2026, 10:49am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/357 "2026-10-29T10:49:54Z")
I get the error “no new devices found”. I have a Vitocal 200-A ie. Is that one not supported yet? ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [October 29, 2026, 3:59pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/358 "2026-10-29T15:59:30Z")
Hey @Rmb That should be supported, could you try again? The Viessmann api has been acting up lately. Kind regards, ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [October 29, 2026, 7:48pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/359 "2026-10-29T19:48:59Z")
Stil the same response: no new devices found. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 1, 2026, 10:37am UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/360 "2026-11-01T10:37:13Z")
@KennyMoens Should I send you a diagnostic report? ---
**Author:** ![KennyMoens](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kennymoens/32/84061_2.png) [@KennyMoens](https://community.homey.app/u/KennyMoens)\ **Post date:** [November 1, 2026, 1:51pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/361 "2026-11-01T13:51:18Z")
You can try but I fear it will not help. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 1, 2026, 8:21pm UTC](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744/362 "2026-11-01T20:21:18Z")
Is it possible to support the new heat pomp Viessmann Vitocal 200-A ie ? [Previous page](https://community.homey.app/t/app-pro-viessmann-make-your-heating-smart/116744.md?page=17)