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07-14-2009, 09:56 AM
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#1006
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VENDOR - Portal Media
Join Date: Feb 2008
Posts: 141
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@ lacning74, I am glad you got your TPMS up and working. The core issue is something that is out of my control as I rely on the sensor manufacturer to provide them with the sensors. All I can do on my end is test each valve stem before it is shipped. This is something we have made as part of the procedure to build each unit as we have had several reports of leaking valve stems. The valve stems are attached to a tool that forces about 100 psi throught the stem. We then place the end of the stem underwater to ensure no bubbles are coming up (bubbles mean leak). You will see more of this part of the procedure once I release the second part of the manufacturing video. Also those of you that are having presistent issues with getting the device to work properly out of hibernation I would recommend that you try the new hub available on the mp3car store. I have one on order myself as it looks like really good hardware and it should solve any issues with hibernation with use of its delayed shutdown contoller.
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07-15-2009, 01:22 PM
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#1007
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Constant Bitrate
Join Date: Apr 2008
Posts: 192
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well my cores have held up well after i tightened them. do y'all loosen them after testing them? i wonder why they were loose in the first place. maybe my tire shop screwed (or unscrewed) with them?
either way, i might never have noticed the leak from the loose core for a while cause the caps themselves seal pretty well. maybe you should include a core tool with the kits, or at least highlight the issue in the installation instructions.
oh yeah, it's so convenient that you already learn the sensors. the fact your kit has pre-learned sensors and pre-tested cores convinced me to purchase your kit.
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07-18-2009, 06:55 AM
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#1008
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FLAC
Join Date: Sep 2007
Posts: 1,200
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A lot of tire shops turn out or remove the core to deflate the tire rapidly in preperation of removal...
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07-20-2009, 09:55 AM
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#1009
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VENDOR - Portal Media
Join Date: Feb 2008
Posts: 141
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Quote: Originally Posted by lacning74  either way, i might never have noticed the leak from the loose core for a while cause the caps themselves seal pretty well. maybe you should include a core tool with the kits, or at least highlight the issue in the installation instructions.
your kit.
We tighten all cores before they leave the facility, I can only assume that your tire shop may have unscrewed them for tire prep.
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07-20-2009, 09:08 PM
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#1010
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FLAC
Join Date: Sep 2007
Posts: 1,200
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This must be a pretty rare problem...
I just had 2 new tires mounted and the tech pulled the cores out...they still seal fine after replacement.
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07-20-2009, 09:18 PM
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#1011
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FLAC
Join Date: Sep 2007
Posts: 1,200
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Which reminds me...
Today I went about 'learning' my sensors, seeing that I have all 4 working now...
But I'm a little confused, as I rotated my tires (front to back) before I learned them. The colour marking is swapped front/rear now.
The problem is, I learned the sensors matched to the colour coding, so using RRTMS, the rear left and right are number 1 and number 2...Front is 3 and 4...
No problem learning them like this, HOWEVER, when setting up sensor assignments in Centrafuse, should I select the numbers the same as RRTMS, i.e. front left/right = 3/4, etc., or should the assignments stay the same, 1 thru 4?
In other words, is CF reading the data as it's learned from RRTMS, or is it assuming front left is always 1, front right 2, etc.?
I think I have the CF plugin really confused...or I'm really confused!
I have to mess with the PSI to find out whats really going on...
Or just 'learn' it regardless of colour coding, and simply learn them in the proper order, 1, 2, 3, 4... (and swap the colour rings around!)
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07-21-2009, 09:34 AM
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#1012
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Confusion Master
Join Date: Sep 2003
Location: If you go down to the woods today, You're sure of
Posts: 11,928
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Quote: Originally Posted by WuNgUn
I think I have the CF plugin really confused...or I'm really confused!
I have to mess with the PSI to find out whats really going on...
Dunno about the CF plugin or you, but I's cerrtainly confused.
Which is really worrying considering my Custom Title.
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07-21-2009, 10:14 AM
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#1013
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VENDOR - Portal Media
Join Date: Feb 2008
Posts: 141
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Quote: Originally Posted by WuNgUn should I select the numbers the same as RRTMS, i.e. front left/right = 3/4, etc., or should the assignments stay the same, 1 thru 4?
In other words, is CF reading the data as it's learned from RRTMS, or is it assuming front left is always 1, front right 2, etc.?
I think I have the CF plugin really confused...or I'm really confused!
I have to mess with the PSI to find out whats really going on...
Or just 'learn' it regardless of colour coding, and simply learn them in the proper order, 1, 2, 3, 4... (and swap the colour rings around!)
Regardless of what program you use to learn the sensors you writing ID's to the recievers internal memory, so the first time you learned the sensors I would assume that 1-FL 2-FR 3-RR 4-RL 5-S. Now that you have rotated your tires (Lets assume you used the traditional rotation patter for rear/4 wheel drive cars as you have a Durango, use this site as reference http://www.tirerack.com/tires/tirete...jsp?techid=43& Pattern C) your order should now have changed to 1-RR 2-RL 3-FR 4-FL 5-S. There is no way for the reciever to know where your sensors are... yet  .
Last edited by Lok; 07-21-2009 at 10:26 AM.
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07-21-2009, 01:46 PM
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#1014
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Hey, you're trying for the goal by going the other way around, you're crazzzyyyy!
Join Date: Jul 2007
Location: Miami
Posts: 4,169
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Quote: Originally Posted by Lok Regardless of what program you use to learn the sensors you writing ID's to the recievers internal memory, so the first time you learned the sensors I would assume that 1-FL 2-FR 3-RR 4-RL 5-S. Now that you have rotated your tires (Lets assume you used the traditional rotation patter for rear/4 wheel drive cars as you have a Durango, use this site as reference http://www.tirerack.com/tires/tirete...jsp?techid=43& Pattern C) your order should now have changed to 1-RR 2-RL 3-FR 4-FL 5-S. There is no way for the reciever to know where your sensors are... yet .
LMFAO...... I have a Durango silly, and I have the 2 Wheel Drive one, couldnt find a decent 03 4x4 in the year 2007 when I bought the car.... WuNgUn has a Ford Focus......
__________________
HiJack ZX1 CFSC
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Please build up my REP.
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07-21-2009, 06:09 PM
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#1015
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FLAC
Join Date: Sep 2007
Posts: 1,200
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Okay...I'll relearn them using RRTMS using the standard 1-FL 2-FR 3-RR 4-RL pattern...
Then use CF to configure where the tires are...
My tires are directional, so they only move forwards and backwards when rotated, not X cross 
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07-21-2009, 06:28 PM
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#1016
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Low Bitrate
Join Date: Feb 2008
Posts: 67
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anyone know where i can get a pre-etched bread board and a programmed pic chip? i am going to hook up this receiver http://www.sparkfun.com/commerce/pro...oducts_id=8947
going to see if i can pick up my sensors to start getting samples of packets so we might be able to decode them. the hope being maybe we can expand this for use with cars that already have sensors
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07-22-2009, 06:20 PM
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#1017
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FLAC
Join Date: Sep 2007
Posts: 1,200
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Okay...reprogramed the sensors again today, this time without altering the locations.
Reprogramed easy, thanks to the new hardware!
Everything seems to be working well...
However, I have the reciever mounted in the dash behind the monitor, and I'm not sure if it's picking up the sensors. The data seems to never change!
(I programed it with the reciever on the dash, so I can 'reboot' it after each 'learn')
Is there a way to know if it's reading 'new' data, or just displaying the 'learned' data?
Perhaps this could be a future feature...to have the TPMS tell you if it hasn't recieved any new data after X amount of minutes?
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07-23-2009, 10:36 AM
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#1018
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VENDOR - Portal Media
Join Date: Feb 2008
Posts: 141
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Quote: Originally Posted by WuNgUn Okay...reprogramed the sensors again today, this time without altering the locations.
Reprogramed easy, thanks to the new hardware!
Everything seems to be working well...
However, I have the reciever mounted in the dash behind the monitor, and I'm not sure if it's picking up the sensors. The data seems to never change!
(I programed it with the reciever on the dash, so I can 'reboot' it after each 'learn')
Is there a way to know if it's reading 'new' data, or just displaying the 'learned' data?
Perhaps this could be a future feature...to have the TPMS tell you if it hasn't recieved any new data after X amount of minutes?
Do you have the LED version of the board??? If so then there are two LED's on the device, one should remain on once the USB link has been established and the other should blink every time you recieve a new packet.
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07-23-2009, 10:41 AM
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#1019
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VENDOR - Portal Media
Join Date: Feb 2008
Posts: 141
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Quote: Originally Posted by Xargon321 anyone know where i can get a pre-etched bread board and a programmed pic chip? i am going to hook up this receiver http://www.sparkfun.com/commerce/pro...oducts_id=8947
going to see if i can pick up my sensors to start getting samples of packets so we might be able to decode them. the hope being maybe we can expand this for use with cars that already have sensors
I would talk to the forum member Dejan about that. I don't think he has been selling them much since the new USB TPMS came out but he may still have a pic chip and a board laying around. Also just so you know the PIC chip is protected so you won't be able to read the firmware. I am interested to see where you go with this development as I have had many people ask me if their TPMS will work with stock systems. Be sure and e-mail me if you need help, I might be able to give you some pointers.
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07-23-2009, 11:04 AM
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#1020
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Variable Bitrate
Join Date: Sep 2000
Location: LA, CA, USA
Posts: 442
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Quote: Originally Posted by Xargon321 anyone know where i can get a pre-etched bread board and a programmed pic chip? i am going to hook up this receiver http://www.sparkfun.com/commerce/pro...oducts_id=8947
going to see if i can pick up my sensors to start getting samples of packets so we might be able to decode them. the hope being maybe we can expand this for use with cars that already have sensors
I don't think you should waste any time on a pre-programmed chip just follow the links on the sparkfun product page to get it hooked up via serial and start reverse engineering the protocol. There is no reason we shouldn't have a receiver for < $50 and the whole system for < $150.
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