Hi.
@mbedarff I fix gateway connection checking issue.
You can download the fixed version from my Google Disk

@mbedarff @ncollins I published all changes to GitHub, "mysensors-binding-addon" branch.

@forexsieno I tested my 3.3.0-SNAPSHOT in different environments (Arduino Nano as serial gateway, OH 3.3 installed on Windows 10 and Ubuntu Server 20.04) and did not find such a problem.

Hi @Chacha

Download org.openhab.binding.mysensors-4.0.4-SNAPSHOT.jar from my Google Disk and try it.
I only tested as a MySensors MQTT Gateway