Searching for some advice on what to do next. I have an older Boron running 3.1.0 OS which has been in the field for almost a year continuously. About a week ago it started to miss posting data. Digging through the device vitals it appears it's connecting to two different towers. One with great connectivity and the other with very poor signal strength much further away. Now it seems to continuously be connected to the worst tower. As far as I can tell it's not related to battery status or memory usage.
What does a cloud device connection error of -220 mean? Can also post more of the device vitals if needed.
timestamp 2023-05-29T22:03:56.559Z 2023-05-29T09:31:57.105Z device.network.cellular.radio_access_technology LTE LTE device.network.cellular.operator T-Mobile T-Mobile device.network.cellular.cell_global_identity.mobile_country_code 310 310 device.network.cellular.cell_global_identity.mobile_network_code 260 260 device.network.cellular.cell_global_identity.location_area_code 31716 31716 device.network.cellular.cell_global_identity.cell_id 19034114 18954499 device.network.signal.at LTE Cat-M1 LTE Cat-M1 device.network.signal.strength 45 81.66 device.network.signal.strength_units % % device.network.signal.strengthv -97 -81 device.network.signal.strengthv_units dBm dBm device.network.signal.strengthv_type RSRP RSRP device.network.signal.quality 0 62.5 device.network.signal.qualityv -20 -9 device.network.signal.qualityv_units dB dB device.network.signal.qualityv_type RSRQ RSRQ device.network.connection.status connected connected device.network.connection.error 0 0 device.network.connection.disconnects 2 1 device.network.connection.attempts 3 2 device.network.connection.disconnect_reason error error device.cloud.connection.status connecting connected device.cloud.connection.error 0 0 device.cloud.connection.attempts 7 2 device.cloud.connection.disconnects 7 4 device.cloud.connection.disconnect_reason error error device.cloud.coap.transmit 1220 822 device.cloud.coap.retransmit 254 172 device.cloud.coap.unack 5 3 device.cloud.coap.round_trip 2768 1468 device.cloud.publish.rate_limited 0 0 device.power.battery.charge 92.5 72.54 device.power.battery.state charging discharging device.power.source VIN battery device.system.uptime 138776 93657 device.system.memory.used 69964 69644 device.system.memory.total 167644 167644 service.device.status ok ok service.cloud.uptime 4 2 service.cloud.publish.sent 1 1 service.coap.round_trip 2017 466 device.network.signal.quality_units %
It'll be a few weeks before I can get out there and investigate further and/or use the Device Doctor for more detailed cellular debugging. Any tips on what I need to look for? Could this be something related to the tower(s) or with the Boron?
Appreciate the help.