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Can anyone just explain to me what this board does as my tmps already work? I don't understand all these technical terms and or documentation.
Manufacturing is done, and they should be up and available on Fasttech within a day or two. Price is US$25. The User guide has been updated with documentation for this.
The kit includes adaptors for installation both above the modem as well as direct to the base board (if you don't use the modem). Firmware support was released in 3.2.013.
Can anyone just explain to me what this board does as my tmps already work? I don't understand all these technical terms and or documentation.
For those interested in the gory details, the full technical write-up is now available here:
http://api.openvehicles.com/downloads/TeslaRoadster2_TPMS_Baolong_Engineering.pdf
i have the new cable. hoping my module has the k-line change you mentioned because I have no soldering skilzHi @JohnGarziglia and others,
For the K-line add on to work properly you must have the "new" harness.
It has a white tape label with OVT1 on it.
It has all nine wires coming from the Roadster where the old harness had
four or more but certainly not all nine.
Also please check your OVMS module for the recent K-line change.
It must have continuity between DB9 pin 1 and DA26 pin 21.
If there is not continuity between these two pins an internal jumper must
be added/soldered inside of the unit for the K-line add on to function properly...
Good luck - You will love it...
Shawn
Hi Drewski,
When did you buy your OVMS3???
Remove it and check the serial number on the back of the unit.
It looks to be a combination of mfg. year, month, day, and a unit number...
Markwj could help you determine if it has the change installed.
With all you do you certainly have a Fluke or other meter for the continuity check...
The continuity check is performed on the bench - Not in the car...
You can do it!!!!
Shawn
I noticed that the carrier frequency for communication with the tyre-pressure sensors is 315 MHz which according to wikipedia is common outside Europe. Despite 434 MHz being more common in Europe according to the same source, I would expect that Tesla used the same system with the same 315 MHz frequency in European 2.x roadsters as for the rest of the world. Am I right?
The K-Line bus from the vehicle is connected via a vehicle specific cable labelled "OVT1". You can easily tell if you have this cable as it has 9 pins wired (the previous cable only had 4), and has a clear OVT1 label in black lettering on white shrink wrap at the vehicle side of the cable.
You will also need an OVMS module with the K-line connection wired up internally. Modules dated July 2018 or later will have this connection already made (date is printed on the top of the main circuit board). You can verify this with a continuity tester, looking for a connection between pin #1 on the DB9 and pin #21 on the DA26 external connectors.
If you have an earlier board, there is a relatively simply wiring modification that can be made to upgrade to this:
I hope that helps.
- You will need a soldering iron, solder, and a small length of insulated wire.
- Pin #1 on the DB9 connector is the K-Line pin from the vehicle.
- Pin #21 on the DA26 connector is GEP 7 (which is also connected to a pin on internal expansion connector).
- On the underside of the board you can solder a jumper wire between DB9 pin #1 and DA26 pin #21 to make this connection.
mods, pls delete the annotated photo I uploaded so no one inadvertently solders the jumper to the wrong DA26 pin using that as a reference, thx.