temperature sensors occasionally read very high

[cbrake]

two temp sensors on a cellular unit are reading very high -- see data below.

4094 is almost 12 bits binary:

In [3]: 4094                                                                    
4094
Out[3]: 
 4094          │  28─╮ 24─╮ 20─╮ 16─╮ 12─╮  8─╮  4─╮  0─╮ 
 0x00000ffe    │                           1111 1111 1110
 3 Ki + 1022 

2019-12-08T09:02:42.629306175Z 0s       CF80000028031F28 0   0   temp 4094.25
2019-12-08T09:02:41.758126234Z 0s       5580000028205C28 0   0   temp 4094
2019-12-08T08:57:42.644222293Z 0s       CF80000028031F28 0   0   temp 4094.25
2019-12-08T08:57:41.800338914Z 0s       5580000028205C28 0   0   temp 4094
2019-12-08T08:52:42.630043439Z 0s       CF80000028031F28 0   0   temp 4094.25
2019-12-08T08:52:41.764862882Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:47:42.874643382Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:47:41.984970182Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:42:42.869453756Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:42:41.971995304Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:37:42.872210058Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:37:41.797281013Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:32:42.871171518Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:32:41.828632297Z 0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T08:27:42.709482288Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:27:41.817365292Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:22:42.903260077Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:17:42.714094969Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:17:41.799314704Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:12:42.709729819Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:12:41.848680436Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:07:42.801414832Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:07:41.839269199Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T08:02:42.710254515Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T08:02:41.925967534Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T07:57:42.729894042Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:57:41.85173649Z  0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T07:52:42.709361499Z 0s       CF80000028031F28 0   0   temp 4094.5
2019-12-08T07:52:41.840930763Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T07:47:42.710143376Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:47:41.836221192Z 0s       5580000028205C28 0   0   temp 4094.25
2019-12-08T07:42:42.710627469Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:42:41.848320584Z 0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T07:37:43.012495245Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:37:41.929843452Z 0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T07:32:42.94967071Z  0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:32:41.849636453Z 0s       5580000028205C28 0   0   temp 4094.75
2019-12-08T07:27:42.790278733Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:27:41.938842837Z 0s       5580000028205C28 0   0   temp 4094.75
2019-12-08T07:22:42.790048419Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:22:41.968937771Z 0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T07:17:42.91914679Z  0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:17:41.919000284Z 0s       5580000028205C28 0   0   temp 4094.5
2019-12-08T07:12:42.789509704Z 0s       CF80000028031F28 0   0   temp 4094.75
2019-12-08T07:12:41.90935098Z  0s       5580000028205C28 0   0   temp 4094.5

[cbrake]

user testing this particular system reported that there were no changes in cables, but there was some rain during this period and the sensors were outside.

[kraj]

what sensor models are these ? are they all same ?

[cbrake]

these are DS18B20 1-wire sensors packaged in the simple iot temp sensing node:

https://github.com/simpleiot/hardware/blob/master/siot-node-temp/siot-node-temp.pdf
https://photos.app.goo.gl/ritKqaFtXVy6wahw8

[kraj]

All of them are same type, I was hoping the makes are different then we could have looked into that dir

[cbrake]

Saw a few more high reading instances at customer installation. Have not been able to reproduce here yet.