Wondering if anyone has had an issue like the one outlined below. For some background, we use Particle Electrons for an agriculture application. We’ve got 500 or so Electrons in the field for this use, spread between Washington, Oregon and California. For the most part we use Particle’s sim cards.
We’ve deployed 22 of our devices with Electrons to a farm outside the LA area. On this farm all devices have good service, 70-85 RSSI dB. Each device checks in every 15 minutes.
6 of the 22 devices go offline intermittently, sometimes for 30 minutes, sometimes for multiple hours. They are the same 6 devices most of the time. This behavior does not occur at any of our other 30 or so locations.
The only clue I have is the devices which experience this seem to be jumping onto a tower with really bad service (111 RSSI dB) . I can see this happening as sometimes the devices don’t go offline when they go onto this tower. Here is example data from two devices https://pastebin.com/BL6WPSJY and https://pastebin.com/qbW7B5rK.
My guess is that the following is happening:
- Device is on tower with good service
- For some reason device is moved to tower with bad service
- Device can connect to this tower via modem, but service is bad enough that it cannot make a data connection
- Device gets stuck on this tower for a few hours, then goes back to good tower
- Process repeats
Has anyone else see an issue like this? What did you do to resolve? I’m thinking through how we might force our devices not to connect to a tower with bad service when there are other towers with better service.