This is possible. Tom Heine has made an app to do this with a TCP-modbus konverter (webpage in Norwegian): Flexit Nordic S4/S3 og Homey – tomheine.net
To use this app you need CLI access to Homey Pro. That prosess is explained here: Getting Started | Homey Apps SDK
Is it not an ease process if you are not a developer. You need a PC or Mac with admin rights to do this.
