Hi Lawrence
I have more than 10 of these UC11-T1 devices and plan on deploying more because I like the form factor of the case and sensor. They join at SF12 and stay at SF12.
I raised the issue with Ursalink and they seem to think it is TTN but having just asked TTN it seems to be with the device!
Do I burn them all now or cry then burn them?
I will set a new one up this afternoon and carefully record the initial join request SF and see what happens.
My existing 10 nodes are deployed on several different sites, all with Multitech external gateways and all to TTN. Different applications.