Since late 2018 I’ve been using a pair of 3G Electrons about 1000 feet apart to control a pump in a water well. From the outset, cellular signal at both sites was extremely low but everything worked like clockwork until earlier this year. For months now, one or the other or often both Electrons will go off line for hours at a time. Yesterday, a 1600-gallon water storage tank ran out of water because there was no connectivity between sites (it usually takes a full 3 days to consume all the water in the tank).
My question is: do Electrons age and become less robust over time? I doubt that, of course, as there are no moving parts (and I change the oil regularly ). My guess is that, for some reason, cellular signal strength has declined even further, but I have no way of knowing for sure. Thoughts?
If replacing the Electrons is advised, they are no longer available unless I purchase an entire development kit. But then, apparently the carriers are going to do away with 3G by late '22, so why would I want to do that even if I could? Particle support suggests that switching to Borons with EtherSIM might be be an effective solution, but no one has been willing to make that assertion firmly. Has anyone here ever replaced a 3G Electron with an LTE Boron and, if so, what was your experience?