OH 3.2.0.M3 / ZigBee binding (Ember M35x Coordinator) / RFC2217 / hacked Silvercrest ZigBee gateway (EFR32MG1B-256k @ EmberZNet 6.7.8.0)

Workaround for openHABian can be found here:

Successfully tested with Sonoff ZB Bridge and Lidl Silvercrest ZigBee gateway.