Up to you whether you want to work with the develop or master branch. They are currently **not** compatible with each-other though, so if you’re flipping back and forth, you’ll need to adjust your code each time to match up. I think all the changes are in the modem structure.
I don’t know if the May code is compatible with the current master or not. It’s definitely not with the current develop.
The code in the develop branch is **theoretically** better than what’s up on master, but it’s never been run by anyone except me and never on a sensor outside of my building. I don’t want to push it to master and release it until someone (or hopefully several someones) can verify its functionality a bit.