You can often find custom edge drivers and their discussion threads by looking on the quick browse lists:
FAQ: Using the quick browse lists without the community wiki
Also, when you see “Mc” as part of a custom edge driver name, it almost always means that the author was Mariano Colmenarejo as those are his initials. He is a very active community developer and his edge drivers are very popular. 
In this specific case, searching the quick browse list for “sensors” would turn up the following author thread, so you can ask questions about that edge driver there:
As far as why some of your sensors have a blank driver name, that’s very mysterious, as they should not work at all if that’s the case. That most typically means that the pairing failed. So I don’t know what’s going on there. 