This is a review for tech support. I have a SM-AF...

This is a review for tech support. I have a SM-AFR device that sat on the shelf for over a year. When I finally installed it, it worked fine for about 2 weeks and then I was getting very odd readings. Despite it being out of warranty, they were quick and responsive to emails. Through their troubleshooting, I found the problem... a bad ground. I relocated it and all is well.

Thank you!