I‘m working on.a binding for the Shelly series of devices: Shelly Binding, but we can‘t register to get the COAP events.
Does someone has experience with the Californium framework? Shelly uses non-standard Coap options. When I register the observer no callback is performed. If I send a command I see ACKs in the log, but they report an unknown option 3332, which Shelly describes in their doc. I didn‘t found a way to register/inject custom options to the Californium framework so the observer can read them. Any help is appreciated.