Yes, the two boards are exactly as you described. One board does the master control and interfaces with the rest of the car. The other is a driver board that fires the transistors and reads current on the three phases. Those LEMs are high speed current sensors used for fine control of the motor ...

Here is a log of the EUV driving around:

https://drive.google.com/file/d/1uAmKTZi5jQEstBJDpsghFc2IrF754nO4/view?usp=sharing

It seems kind of short. Here is a much longer one:
https://drive.google.com/file/d/1eJysLYGTiG70rWKjHjI9ma1j7G6goyGK/view?usp=sharing

The Bolt is a GLOBAL-A vehicle which is ...

Got my Bolt inverter yesterday. Probably won't have a chance to take a look inside until Sunday.


I have a 2022 Bolt EUV. I also happen to know a bit about SavvyCAN and CAN reverse engineering. So, if you want to go down the CAN rabbit hole, I'm willing to help too. I can give captures of the ...

If you're going to take a crack at it, let me quickly lay down some info that is probably covered in Damien's videos but here it is in the reader's digest version:

Comm is in the form of a proprietary version of isoSPI. Standard off the shelf things like LTC6820 do not work.

Unlike standard ISOSPI ...

The battery does indeed have a pyrofuse and it does indeed often blow in an accident. However, this does not stop the CAN communication at all. It still flows exactly the same either way. No, you're probably just using a crappy CAN adapter. I know, I know, you think you bought a good enough one. If ...

Resurrecting zombie topics! Just in time for Halloween!

I recently tried to get a G revision charger from a crashed Tesla to work. No go. It would kind of work but really only one module then that module would click off, then come back, over and over. I replaced the charger with an E revision (took ...

I updated the wiki page for the LDU so you may want to look there. But, one thing I found is that RPM and turns do not change unless the inverter is activated. You can have it in manual mode for that. Just tell the webpage to put the inverter in manual mode and then don't tough the controls for ...

What year Bolt are you looking for captures from? I have a 2022 EUV. I believe some messages may have changed from the earlier models but I can't really confirm that. I can easily capture data from the OBDII port which contains the main powertrain CAN bus. Are you saying there is a different canbus ...

The biggest question is how much complexity you need to add to the DC/DC converter. If that's not to much then its an easy gain of energy losses, space , costs etc.


Probably not a lot I'd guess. If their DC/DC is already a buck/boost type (or similar) system then it probably can work both ...

I now have contact closure! I needed a capacitor across the HV output presumably to satisfy the charge up time of the precharge process.
The contactors take a lot of current at the start and the dcdc converter puts out a lot of voltage too, I saw almost 20v across the battery terminals for a ...

Sorry the EVTV board came un-programmed. They shouldn't have sent it like that. Over at savvycan.com there is a binary "updater" which actually just flashes precompiled firmware to the board -> https://www.savvycan.com/GVRETupdate.zip you can use that on basically any Arduino Due based board but as ...

I know WK057 who is behind that company. I think it'd be fair to say that he's one of the most knowledgeable people out there when it comes to Tesla hardware. He's got a proven track record. I believe I was the first person to spin a Tesla Model S drive train outside of a car and he was the second ...

Don't forget the US and Canada are part of NATO also so I fear a 'stray' missile would cause WW3!!!


And that's even worse. A lot of people in the US, me included, wish we could swing in to the rescue and crush the Russian forces to save Ukraine. It makes me sick that we're half the world away ...

Hey Guys, I have a ford E crate Eluminator motor that I plan to FOC tune with the prius gen 3 inverter. Does anyone have experience with this motor? Ford does not provide any information at all with the motor. Especially nothing about the connector or pinout for the resolver connections or the ...

No, actually it worked fine! I'm just an idiot. Here is the short version:

I used a dual serial port chip on that board. The first port connects to the ESP32. The second port connects... nowhere by default. It used to be connected to the ESP32 also but it took up pins we wanted to use for other ...

I commited this libary to my github fork.
(no clue how i can make pullrequest for damien yet)

https://github.com/EV-Builder/Stm32-vcu


Go to your repo that linked to above. While there, go to the pull requests tab. Then click the "New Pull Request" button. This will automatically try to ...

C:\Users\psman\Documents\06_Projects\MSP\CAN Sniffing\ESP32RET_Updater\ESP32RET_Updater>esptool
usage: esptool [-h] [--chip {auto,esp8266,esp32}] [--port PORT] [--baud BAUD]
[--before {default_reset,no_reset,no_reset_no_sync}]
[--after {hard_reset,soft_reset,no_reset}] [--no-stub]
[--trace ...

You can use the binary at www.savvycan.com to get a good, working copy.



Ok so this seems like a dumb question, but I've downloaded the ESP32RET firmware updater from SavvyCAN, and when I try to open the application, it flashes on my screen briefly and then disappears. Is that normal behavior ...

The problem is that the Arduino-ESP32 board files updated the WiFi library and it breaks the existing ESP32RET codebase. You can use the binary at www.savvycan.com to get a good, working copy.

I ought to update the github repo to fix this problem. I knew about it but haven't gotten around to fixing ...

For the curious - the Leaf speaks UDS when it is doing things like this. UDS, in the case of CAN, is transmitted using ISO-TP which is a protocol layer on top of raw CAN. ISO-TP uses the first byte for a variety of uses but one of them is to specify how many bytes follow. So, when you see 0x02 as ...

Does anybody have a suggestion how to solder this chip on the board correctly? I am using a hot air gun though but it feels like playing with lego while wearing boxing gloves.

I am very close to throw the board into the bin and wait until I can order a board that is fully populated


Yes, it can ...

As getting an genuine encoder for these babies will probably be near impossible, I wondered how feasible it would be to make up something to give the necessary feedback. The Motors look like they would be good in my acquired Smart car.


Encoders are not strictly necessary for induction motors ...

I did probe around but found no voltages after pin 1 of IC11. I suspect that IC11 is faulty


If it is installed the proper direction and you're getting power to pin 1 then you would expect some power elsewhere. The pin 2 should be PWM'ing into the inductor. If you have the means to remove it you ...

Thanks Collin80,
Yes, that is the way, however, I though you had to take the diode out of the board first.
Anyway, I checked and both diodes are correctly mounted, however, D1 measures both ways, I guess because the are other components connected to it


You generally don't need to take it off ...

Hi Deeamon,
No voltage on pin 2 of the XL1509 IC11, nor on L3.
The diodes where pre-assembled when I received the board.
What is the best way to check polarity of the diodes?


... with the diode function of a multimeter. ;) Diodes only pass current one way. If you don't have diode function but ...