Open ChargePort

[TonyWilliams]

I've asked the above poster for the board and will order the Silicon Labs dev board set up shortly. It comes with a fob and a receiver. With luck, I can use the receiver to determine the code then program that into the fob. I'll check DigiKey to see if they sell just the fobs (for those that want one).

The card is coming to you US Priority Mail. You're welcome to put three test leads in the annotated spots. Please use the correct colors, if you can, just to keep things easy to follow along. The antenna outputs U1 at R5 to loop around the card (U1 pins 3 and 4):

Blue - 3.3 VDC
Green - Ground
Orange - Proximity

http://www.silabs.com/Support%20Documents/TechnicalDocs/Si4010.pdf


U1:

U1 Programming Mode

 

[Fuzzylogic]

The Center wire is ground.
Green must be the Proximity wire.

 

[TonyWilliams]

The Center wire is ground.
Green must be the Proximity wire.

Of course, and I have them backwards!!!

From top to bottom should be Power 3.3 VDC "blue", Ground "green" and Proximity "orange".

 

[Fuzzylogic]

For the DIY-ers:

The original design, used a PIC 12F1822 microcontroller.
Now i also created a version for the cheapest version available from microchip, the PIC 10F200.
It can be downloaded here

 

[lolachampcar]

Tony,

Will do and thank you. I did see the thermals on the "Green" and figured that was ground. I normally will confirm power and ground off the ICs prior to trying to power anything up.

 

[necho]

Thanks a lot Fuzzylogic, I'm very pleased by your great work ... have used your program and put everything together, happily I had a type 2 cable that had a unused metal button. So I opened it up and build everything into the switch, happily it was small enough. Here are the pictures ...

that's the type two I got with the metal switch on top

and that's the way everything fit in there

... and it works fantastic!! hope the battery last some time!!

Many thanks again to Fuzzylogic!!

 

[Fuzzylogic]

Cool!
Great that you got it to work, and thanks for sharing the pictures!

Never seen a Type2 connector with the buildt in switch. Where did you get this?

 

[necho]

I did not know either that this "empty switch" is in it when ordered ... the manufacturer of the plug is ITT Cannon ... e.g. here ECCE3221-16U-ECCV - ITT CANNON - LEAD, IEC TYPE2 - IEC TYPE2, 32A | Newark

 

[Ben W]

I dont understand, why tesla didnt include this function into the key.

Does the keyfob use the same frequency?

It wouldn't have to. It already communicates with the car, so it could tell the car to open the charge port, say with a triple-tap or tap-and-hold; it wouldn't have to interface with the charge port directly. I requested this feature a year ago, and I guess it never got anywhere. Alas, maybe one day.

 

[zax123]

It wouldn't have to. It already communicates with the car, so it could tell the car to open the charge port, say with a triple-tap or tap-and-hold; it wouldn't have to interface with the charge port directly.

Very good point, my brain must have been in sleep-mode that day.

 

[lolachampcar]

I'm making some good strides towards using the Si4010. One of my goals is to have an inexpensive add on to the OpenEVSE such that a transmitter in the box is activated when the logic board sees the button being pressed without the EV attached.

Feedback from those familiar with Manchester Encoding and such would be most welcome.

See
http://www.teslamotorsclub.com/show...op-charge-port-door/page8?p=459460#post459460

 

[lolachampcar]

I've got the Silicon Labs development reciever capturing the MS charge cable transmission...
http://www.teslamotorsclub.com/show...op-charge-port-door/page8?p=460832#post460832

 

[L@urens]

I anyone planning on selling a 'complete' version, that is: in a (tiny) housing?

 

[lolachampcar]

Right now I am working with the OpenEVSE guys to do a board that fits in the OpenEVSE box. We are looking at ways to get the button on the 1772 handle to actuate the transmitter (not looking good right now), put a button on the box itself or have a key fob dongle type thing hanging from the handle to make it convenient. My development kit came with a 315 MHz key fob but SiLabs does not seem to sell them separately like they do for the other frequencies. In short, still looking for options.

I got in the new Si4010 parts and now need to replace the programmed part on my fob with a blank one so I can try out my code.

 

[L@urens]

Good stuff. I'd opt for a key fob that hangs with your keys or charge plug. This will probably see wider adoption as you're not solely providing a solution for OpenEVSE users.

 

[lolachampcar]

I know. I just do not want to deal with sourcing the buttons, button overlay, plastics and the like as those things can be a real pain. Hopefully I can find a Si4010 based fob in the 315 MHz range and just swap the 4010.

 

[q2222]

Hello,
I am following the Forum for more than four years now and I thought it is time to place my first post... I have designed a key fob last Sunday based on the fact that my third prototype died (humid weather conditions in Switzerland). I do actually not know if my design works as planned- we will see. The design is based on a PIC12LF1840T39A.

 

[lolachampcar]

Entry for most creative use of a ping pong racket... All kidding aside, thanks to Fuzzy for all the help.
US Model S charge port opening code done for 315 MHz @ 2.4 kb/sec

http://www.youtube.com/watch?featur...tHPg&feature=youtube_gdata_player&app=desktop

 

[zax123]

Entry for most creative use of a ping pong racket... All kidding aside, thanks to Fuzzy for all the help.
US Model S charge port opening code done for 315 MHz @ 2.4 kb/sec

http://www.youtube.com/watch?featur...tHPg&feature=youtube_gdata_player&app=desktop

First of all, AWESOME!! how small can we make it?

Second, it looked uncomfortable holding that racquet between your legs.

 

[MindBender]

Can anybody please confirm (or deny) that this is the proper radio unit:
http://nl.farnell.com/aurel/tx-mid-3v/rf-mod-tx-am-ook-3v-433-92mhz/dp/1699470
to use with the existing project (https://github.com/mstegen/Open-Chargeport)? The part number most closely matching the part number mention (http://nl.farnell.com/aurel/tx-saw433s-z-rfm/rf-module-tx-ook-434mhz-ext-ant/dp/1699491) seems to have a different footprint.

Would a 5v version (http://nl.farnell.com/aurel/tx-mid-5v/rf-mod-tx-am-ook-5v-433-92mhz/dp/1699471) work as well? The PIC12F1822 doesn't seem to have a problem with 5v.
I'm intending to built it into my charging equipment, which already has 5v available.