Custom USB tyre pressure monitoring interface

**FMode** · 12-17-2007, 03:20 PM

Originally Posted by Enforcer

so where exactly did you get these units for 100Euro?

They are from WAECO "MagicControl MTPM100" ordernumber: MTPM-100 ... offical(!) WAECO Germany price is 99... WAECO Austria and UK also have them available... WAECO USA doesn't have them (because they are on 433Mhz? I have a garage-opener on 315Mhz here ... so

)

**FMode** · 12-17-2007, 03:32 PM

Originally Posted by WuNgUn

Okay, how do I get a complete setup, ready to go, minus the wheel sensors? Or do I need a COMPLETE kit with reciever, and piggy-back it on a custom PCB?
You guys have done a tremendous job with this!! I wish I could easily incorporate it into my CarPC

someone may construct a PCB for Robby's PIC which also needs a "5-3-2" pin receiver like the one from WAECO... I guess it may also be interesting to sell complete kits (taking out the receiver from the WAECO blackbox is done quickly...)

Originally Posted by LYHTSPD

I am starting to wonder if the tpms sensors are interchangable. What happens with the Valet unit if you need more sensors? Can you use another sensor from a different company?

I have boxes of OEM TMPS recievers sitting next to me (Honda, Toyota, etc). None of them look like the after-market ones though. All have intergrated boards. But I guess they do not need all the fancy external lcd stuff though since it all goes to the ECM.

me too

as the sensor id is 4 million the chance to have a double sensor accross manufacturers is very small

**DigitalVampire** · 12-17-2007, 10:23 PM

Please correct me if I'm wrong. I guess all we need is a 315/433 Mhz receiver and connect it to Robby's PIC. I guess a variety of TPMS sensors available in the market for various vehicles must be able to send data to a 315/433 Mhz receiver.

Parallax 433Mhz Receiver is available for ~40$

**LYHTSPD** · 12-17-2007, 10:32 PM

Originally Posted by DigitalVampire

Please correct me if I'm wrong. I guess all we need is a 315/433 Mhz receiver and connect it to Robby's PIC. I guess a variety of TPMS sensors available in the market for various vehicles must be able to send data to a 315/433 Mhz receiver.

Parallax 433Mhz Receiver is available for ~40$

You know, I was starting to wonder if there was just a generic reciever that we could use.

**DaveDog** · 12-17-2007, 10:41 PM

Ok, I'll follow up with pics soon.

Looks like the freq. of the Valet receiver unit is 436.000571 Mhz.

All of the tire sensors have the same # stamped on them.

My receiver module is marked as F4.

If this works this will be a nice install.

**mrbean_phillip** · 12-17-2007, 10:44 PM

@ Digital Vampire: Yep, it should work pretty well, one just needs to make sure that the pressure sensors match the frequency of the receiver.

Another nice feature is that it can be interfaced (via MAX232 line driver) directly to your PC serial port, which is an alternative to Robbie's design - with one caveat - you will have to do the software application on your PC, where Robbie has his running in the PIC Micro....

Both have advantages though, this provides for an alternative

**Enforcer** · 12-18-2007, 08:28 AM

Originally Posted by DigitalVampire

Parallax 433Mhz Receiver is available for ~40$

Which equates to $120 for a full set. (richyrich might me able to get full kits for $100 + expenses)

Also they look pretty open to have dangling in a tyre.

**LYHTSPD** · 12-18-2007, 08:33 AM

Originally Posted by Enforcer

Which equates to $120 for a full set. (richyrich might me able to get full kits for $100 + expenses)

Also they look pretty open to have dangling in a tyre.

DigitalVampire posted a link to a reciever, not a sensor. You would still have to source your TPM sensors, but this way you would not have to buy a $250 product and end up not usuing 3/4 of it. If you could use the extra sensor set that you can get from 3rd Eye at $100 for 4, you might be able to get by with about $160 for a functioning TPMS system. I would love to see richrich get a hold of these at $100 a set, but that it going to take a lot of capital up front from him.

We wait and see...

**dyne** · 12-18-2007, 09:27 AM

Using the parallax receiver with a serial interface sounds like it would be great. There are a number of tpms sensors for well under $100. You would just have to find ones with the appropriate frequency, right?