# \[APP\]\[Pro\] Nilan - Outstanding indoor climate - TCP Modbus/CTS602

**URL:** <https://community.homey.app/t/app-pro-nilan-outstanding-indoor-climate-tcp-modbus-cts602/137344>\
**Category:** Apps\
**Tags:** app, homey-pro\
**Created:** [May 30, 2025, 4:33pm UTC](https://community.homey.app/t/app-pro-nilan-outstanding-indoor-climate-tcp-modbus-cts602/137344 "2025-05-30T16:33:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![osku](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/osku/32/132462_2.png) [@osku](https://community.homey.app/u/osku)\
**Post date:** [May 30, 2025, 4:33pm UTC](https://community.homey.app/t/app-pro-nilan-outstanding-indoor-climate-tcp-modbus-cts602/137344/1 "2025-05-30T16:33:00Z")

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Homey already has one app for Nilan heat pumps, but it only supports CTS700.  
I have created a very comprehensive support for heat pumps running with CTS602.  
Connection requires TCP Modbus bridge. I recommend cheap Elfin EW11 (I use it).

Sources: [https://github.com/oskarirauta/homey-nilan-app](https://github.com/oskarirauta/homey-nilan-app)

For now, app is not yet published, but ones wanting it early, can get testing version from here: [Nilan | Homey](https://homey.app/a/com.oskarirauta.nilan/test/)

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**Author:** ![osku](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/osku/32/132462_2.png) [@osku](https://community.homey.app/u/osku)\
**Post date:** [June 8, 2025, 6:15pm UTC](https://community.homey.app/t/app-pro-nilan-outstanding-indoor-climate-tcp-modbus-cts602/137344/2 "2025-06-08T18:15:16Z")

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Okay, some updates here; There’s new version at [GitHub repository](https://github.com/oskarirauta/homey-nilan-app) for this;

Pretty much a complete re-write, it’s much better now. App submission has for the moment been redacted because there is already a Nilan App - though it doesn’t support CTS602, only CTS700 - and people at Homey would love these 2 to be combined to same app.

So, because CTS602 (at least on feature set that I have given for it) is much larger than original Nilan app’s CTS700 support, I decided to port CTS700 support to my creation instead of beginning it from the fresh again to add it to existing app.. Less work this way.

I have contacted original author of CTS700 Nilan App and requested for collaboration and testing, since I don’t have CTS700 board. But anyone owning CTS700 can test it (at least if you have setup Homey development environment and use `homey app run` with this repo)

So testers would be welcome; hopefully original app’s developer reaches me.

Yes, on version 1.1.0 I have basically re-written almost all of the code, and made a lot of changes - which are not very much visible for end-user (besides cts700 support), but make code much easier to read. Feel free to test and report here on your journey with app, please 🙂