ZigBee - Bindings | openHAB and https://itead.cc/product/zigbee-3-0-usb-dongle/ contradict each other re HW flow control.
Any proof (log files etc.) that communication problems are the root cause? Any battery operated Zigbee devices involved?
My setup (two separate Zigbee networks bridged by openHAB):
- openHAB Zigbee Binding and Hacking the Lidl Silvercrest ZigBee Gateway: A Step-by-Step Tutorial
- Zigbee2MQTT/openHAB MQTT Binding and ZBDongle-E (30+ devices - no idea how long it’ll take to restart the Zigbee network)