Since I'm pretty much done with this guy:
http://www.thorforums.com/forums/f27...nsor-1177.html
I figured: Hmm what other thing can I make overly complicated and write some software for? Oh look I can get Bluetooth TPMS sensors. I wonder if I can reverse engineer those??
Turns out: Yes you can.
I picked up a set of these guys (6 to start with):
BLU Technology Products | Home (external sensors), grabbed my spare tire for the dolly (smallest tire I can bring indoors) and did a little hacking
Turns out the sensors are Beacons and broadcast the pressure and temp on a regular interval (somewhere in the range of 10-15 seconds--at least when the tire/wheel is sitting on the floor in my office).
The conversion from raw data to PSI is pretty straightforward (have to figure out the temp one..don't have enough values there like I do for pressure--I filled the tire up to 80+ PSI and took readings as I lowered the pressure in the tire, made a handy graph in excel..hey look its linear! LOL).
Why do this? Well instead of just running their app in which you set valid ranges and it alarms you when the tires go out of that range I figured I'll make my app log the temp/pressure over time (and probably graph it). May notice something a lot earlier than simple alarms.. who knows.
More data is better right..?
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