Well, the parts have turned up and if I wasn't competing all weekend AND shifting house in the evenings I'd be able to knock out a one wheel proof of concept tomorrow. I expect to have a working version next week sometime.Talkiet wrote:Cool, this is very close to what I am doing - except I am not looking to integrate into a legit datalogger. I'll probably include a GPS module on my build and log with time and location stamps and then process on a PC afterwards or parse into something that racerender can use. Good point about the other inputs being needed - some of that can be derived from GPS but with a suitable i2c multiplexor solution we should be able to grab as much as we want.techtoys wrote:I'm working on a similar system at the moment too. Sensors are Adafruit Contact-less Infrared Thermopile Sensor Breakout (TMP007). The device that polls them will probably be a 4Duino because of its built-in display. The trickiest part will probably be working out the CAN-bus messages to send from the 4Duino to the AIMsport datalogger system on the target vehicle.
We want the tyre temperature data to be integrated with lateral G-forces, track position, speed, steering angle, and suspension position. Otherwise it is of only limited use.
From experience with my own car, tyre temperature measurement after the cooling-down lap at the end of a race is meaningless.
Cheers - N
I made 2 mistakes in ordering (which fortunately are pretty cheap mistakes on Aliexpress)... I ordered the cheapest sensor which turns out to have a 90 degree Field of View... I'll need some narrower FOV parts to do it properly, but these 90degree parts will work fine for proof of concet. The second mistake was ordering i2c multiplexors - even though all the sensors have the same address out of the factory, they can be reprogrammed, so wiring them all up to a single Arduino just became trivial!
Cheers - N