TPMS, Neptune WM and Weather stations

[Dovid]

Hi all

I have been doing some testing in the last few days.

Loaded the laptop in my truck and went for a drive and I traveled about 100 meters before the TPMS data from my new winter wheels started showing up.

The pressure data was all right on but the temperature doesn't show correctly.

The program shows +54.0 F but the real temperature was -5.4 C so appears to be a bit of a mix up there. I have seen this behavior before.

 I also have a TPMS sensor in the full size spare tire that did not send any data at all. 

This spare is also a new winter wheel. The folks that work in the tire shops always tell me the TPMS will not work properly with a sensor in the spare tire. 

Those guys are wrong about a lot of things. I can install the spare and then do a relearn without a tool and without any problems. 

I also got some water meter readings along some weather station data. 

My 25 year-old weather station has all but given up so It's great to get all the weather data from the neighbors new stations that have gone up.

Cheers

 

[Alan Rothenbush]

I'm certainly no expert in these things, but tires do heat up when driven for a while, to remarkably high temperatures, in fact.  After 100 meters, maybe not so much, but after a kilometer, 60 F is an absolutely believable number, even if they started at -5 C.

[Devin Noel]

TPMS typically goes to sleep & doesn't transmit until some kind of motion sensor wakes it up as a battery saving measure. Having to drive for a few dozen seconds before it wakes up is standard behavior. That can also cause the spare tire issues. I think they wake up & beacon occasionally when in sleep mode & no rotation, which will get your spare to report eventually. But it probably varies with the different TPMS types.

Does the temperature change at all? Not all TPMS report temp. It could just be default values. If it changes it could be just an offset problem. My trailer TPMS on the RV can get pretty toasty, especially coming down the mountains with lots of breaking.