Homey Pro has no Subscription (except for cloud Backup)
Do you have Homey (With a Subscription)
or do You have Homey Pro (without Subscription)
I guess Geeni device are not yet supported, Please ask Geeni Support to develop support for Homey
or post your request in the following post providing as much possible info as described in the template, that’s what it is for and you will probably have a better chance to find a programmer.