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The Micro-Trak products based on the TT3 also have built in temperature sensors. Most use the LM335Z, which can be removed and remotely placed, or through an auxiliary input. The RTG-FA is pretty popular for RV's, Trailers, etc. ( The hardest part in these beasts is always trying to find a way to mount a decent antenna to the shell) The TT3 does not allow storing a fixed location. You can either allow the unit ( In configuration) to send packets even though there is not a valid GPS position being fed to the TT3, or add a GPS. Having a GPS attached is probably a good idea if your Trailer might actually move. FYI, the RTG can "sleep" the GPS between scheduled transmissions to save power, and this will also minimize the internal temperature of the board, enough so at least to perhaps avoid having to add an external temperature sensor.? I think Scott Miller's OpenTrack product has the ability to change config based on various factors, i.e, Altitude, temperature, supply Voltage ( Scott, sorry if I am getting any of these wrong) so it may be a little better suited to your application. 73, Allen AF6OF On Tue, Mar 23, 2021 at 11:19 AM Rob Giuliano via <kb8rco=[email protected]> wrote:
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