I recently found that Sonoff devices with newer default firmware can be controlled directly again, through the recently added DIY mode.
Do you want to control the SONOFF device via your own app or home automation platform? DIY Mode helps!
The DIY Mode is designed for IoT home automation users and developers who would like to control the SONOFF device via existing home automation open-source platform or local HTTP client instead of eWeLink App. In DIY Mode, when the device is connected with the network, it will publish its services and capabilities according to the mDNS/DNS-SD standard. Before publishing the service, the device has enabled the HTTP server on the port declared by the DNS SRV record. Device exposes the capabilities through an HTTP-based RESTful API. Users can obtain device information, control the device by sending an HTTP API request.
But since Robert stopped using his Homey, what’s next?
There currently are 4 supported devices, but I can’t (yet) help out as I have no supported devices.