Hi @bickster, You are welcome to try https://drive.google.com/open?id=0BySpTvoKcPfRenNnWW9naU1Cck0 - credit for all the useful connectivity bits goes to Andrew @thinginnovations , I just adapted his program to work with a very simple light sensor. This programme works very reliably for one of my mDots. Just remember to change the device ID to one of your own!
Do you get any errors from the poly packet forwarder or when you run /etc/init.d/lora-network-server start ?