Discussion about USB TPMS project.

TOPIC: USB TPMS Kit

USB TPMS Kit 30 Sep 2010 10:49 #6

  • _Dejan_
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What is TPMS

A tire pressure monitoring system (TPMS) is an electronic system to monitor the air pressure inside a pneumatic tire. They are sometimes referred to as remote tire pressure monitoring systems (RTPMS) or simply as run flat indicators.


Types

Direct
Direct TPMS delivers real time tire pressure information to the driver of the vehicle - either via a gauge or a simple low pressure warning light. These systems employ physical pressure sensors inside each tire and a means of sending that information from inside the tire to the vehicle instrument cluster.....

Indirect
Indirect TPMS measures the air pressure indirectly by monitoring individual wheel speeds and other signals available in the vehicle. Most indirect TPMS uses the fact that an under-inflated tire has a slightly smaller diameter than a correctly inflated tire and therefore has to rotate more times to cover a specific distance to detect under-inflation. Such TPMS can detect under-inflation in up to three tires simultaneously but not in all four since the operating principle of these systems is to compare the different wheel speeds and if all four tires lose the same amount of air the relative change will be zero. Newer developments of indirect TPMS can also detect simultaneous under-inflation in all four tires thanks to vibration analysis of individual wheels or analysis of load shift effects during acceleration and/or cornering. Indirect TPMS is cheap and easy to implement since most modern vehicles already have wheel speed sensors for anti-lock braking systems and electronic stability control systems. The disadvantage is that they rely on the user resetting the system by pushing a "Calibration Button" when the tires are changed or re-inflated—forgetting to perform this initialization leads to potentially dangerous false or missing alerts. Another disadvantage of indirect TPMS is that if the Calibration Reset Button is pressed when one or more tires are under-inflated then the system accepts this under-inflation as normal and the driver will be unaware of potentially dangerous tire pressures.




USB TPMS

Robby BMW from mp3car.com forum has develope USB interface which we can use with 3rd Eye TPMS kit.

LINK to thread.


How look USB board?

Few pictures of my boards:






Im order USB Kit and sensors&receiver how can I complete it?

First you must open original receiver:


And take PCB out:


Then you must desolder LCD board and RF board:



After this we must cut board with dremel, when you do this be very carefull because you can destroy your TPMS!!!



You need this part:


Then solder this board into my USB board:


And put all in case:



Software

Robby BMW has write Plugin for RoadRunner which you can get it HERE and he write Standalone program TPMS Doctor which you can get it here:
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Wolfgang from Fluxmedia forum has write Plugin for Centrafuse which you can get it HERE.

SHOP Page where you can buy it

Support:
If you need some help with hardware please ask here in this thread.

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Last Edit: 17 Oct 2012 17:58 by _Dejan_.
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Re: USB TPMS Kit 18 May 2012 03:59 #622

  • Pinin
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I bought a set in December 2009 (carpc-project.ru/How-it-made.html , carpc-project.ru/Upgrade.html).
There are a lot of problems with its use: built-in screen ParkProfi shows some values​​, PIC - other.
The system is connected to the scheme: carpc-project.ru/images/stories/Foto/External-connection.jpg

And the plugin does not work under Win 7...
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Re: USB TPMS Kit 28 May 2012 08:30 #623

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Pinin wrote:
I bought a set in December 2009 (carpc-project.ru/How-it-made.html , carpc-project.ru/Upgrade.html).
There are a lot of problems with its use: built-in screen ParkProfi shows some values​​, PIC - other.
The system is connected to the scheme: carpc-project.ru/images/stories/Foto/External-connection.jpg

And the plugin does not work under Win 7...

Hi,
CF plugin work ok with Win7 for RR I don't know, but is open source and can be fixed to work with Win7... Sensor learning procedure is little tricky but if I have right info with PIC 2.01 is big improvement...
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Re: USB TPMS Kit 28 May 2012 10:18 #625

  • Pinin
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Ок. Forget about the OS yet.

The data on your adpter removed from the receiver system TPMS. Why is reading the adapter different from the regular reading of the system`s monitor (OS - Win XP)?
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Re: USB TPMS Kit 28 May 2012 10:27 #626

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Pinin wrote:
Ок. Forget about the OS yet.

The data on your adpter removed from the receiver system TPMS. Why is reading the adapter different from the regular reading of the system`s monitor (OS - Win XP)?
You are talking about difference by reading values on same time from LCD and TPMS doctor? This question will best answer you Robby on mp3car forum, because Im not build firmware and don't know how he make reading... I just resell his programmed PIC's so don't have access to FW... If you using some old FW ask him for upgrade(It is free but you must cover PIC shipping to Italy and back)...
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Re: USB TPMS Kit 28 May 2012 19:45 #627

  • Pinin
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I am talking about difference by reading values on same time from LCD and Robby plugin for RR. He no longer appears on the mp3car forum...

Old FW? Apparently, he was already old at the time of purchase (such problems were present from the beginning). And send a pic in the "free" re-flash - postage exceeds its cost.

I do not know - the idea, of course, is good, but the embodiment of ... Disappointed.
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