I need help restoring my internal CAN messages for the Tesla Gen 2 charger. I sort of deleted all my CAN messages, and the charger won't work. I am using the new UI, so I cannot find a setting to restore the default CAN messages needed to make the charger work.


I solved this by reinstalling the ...

Thanks for your note. I have deleted all CAN mapping and tried for just the sole inverter temp and get nothing. Both by a direct entry in the table, and as a command. You're right, that is the only gauge I'm running for temperature around the motor.

Time to get it up on the rack and dig into the ...

Hi,
Thanks for the input.
I tried the above; putting it on the bus with other CAN transmitters but I did not receive any messages. I only received messages from the other sources I e ABS, instrument cluster but none from the SDU.

Measure you CAN network with everything off, it needs to read 60 ohm thus 2x120 ohm terminating resistors present.


Thanks,
I measured and I got 60ohms as stated above. I also confirmed that I have the 2x120 ohms.

For context, I am using an Arduino Nano with an MCP2515 running the script below ...

Just bumping this thread as I never got help.

I really need help reading these CAN messages.

If I am connecting the SDU directly to an MC2515, do I need the terminating resistor?

I installed firmware v1.19 and it solved it.

langoo wrote: ↑Fri Jun 06, 2025 1:48 pm Did you get this sorted, we have the same behaviour in our SDU-powered Porsche?

Nope, never got this solved. I just learned to use my hand brake better

Hi,
I am running a GEN 2 Tesla charger on v1.17and I need help restoring my internal CAN messages for the Tesla Gen 2 charger. I sort of deleted all my CAN messages, and the charger won't work. I am using the new UI, so I cannot find a setting to restore the default CAN messages needed to run it ...

I need help restoring my internal CAN messages for the Tesla Gen 2 charger. I sort of deleted all my CAN messages, and the charger won't work. I am using the new UI, so I cannot find a setting to restore the default CAN messages needed to make the charger work.

Thought I'd share how I solved this thanks to the prior thread by @scrappyjoe and the tip above by @johu

1. Install WSL if using a Windows machine. This can be found on the Windows Store.

2. Complete the WSL setup and run the commands below to update and upgrade it, IF required.
sudo apt update ...

Hi All,
I have 2 open inverter boards using the esp8266 board, one for my small drive unit and another for my Gen2 charger. I can already access the web UI on 192.168.4.1.
I have been looking for detailed steps to update the web interface from the old UI to the new one on Git, but there don't seem ...

Hi,
I have a Tesla SDU running the v3 board with firmware version 5.35.R
Is there a way I can implement Hill Hold?
If yes, what are the recommended parameters for a Tesla SDU?

This thread can be closed. No solution found for the fixed PWM output.
I ended up getting a Corsa EPAS control unit to control the electric steering.

Not supposed to be like that. Is your 12v supply stable?


Yes it is. I use the same supply for the Tesla SDU and DCDC converter which run fine.

I did find a solution after going through numerous threads here.

SOLUTION I FOUND : For anyone else using the Openinverter GEN 2 Charger v5 board who ...

Hi All,
I have a Tesla GEN 2 Charger with an openinverter v5 board running firmware version 1.06R as shown below:

ff.png
erer.png

I have the following issue;
Every time I turn the charger on, the WIFI web interface becomes available, however, I can not see any parameters or check spot values ...

jrbe wrote: ↑Thu Nov 14, 2024 7:35 pm Does the rack assist change? What happens with the rack if you set a fixed pwm when in drive / reverse?

How do I set a fixed PWM?

I have completed an EV conversion using a Tesla Small Rear drive unit running a V5 board with firmware v5.27. I have used an electric steering rack from a Honda that needs a VSS signal that I get from the ABS, an engine pulse signal that I am getting from the Auxilliary PWM Output of the inverter ...

Do you have a known working setup to confirm you Arduino and mcp2515 are working?

Check the crystal frequency for the can controller matches the used library.


Yes, I am using the same Arduino and MCP2515 to read the CAN system for the conversion car, so it works. I have tried to match all the ...

I am having the same issue as @timbradley.
I can not get my MCP2515 to recieve any CAN messages fron the inverter even after mapping them to as TX values.
I have tried to map one value at a time but can not recieve any values. I am using an Arduino with an MCP2515.

Anyone tried reading CAN messages ...

mane2 wrote: ↑Sun Jul 14, 2024 7:36 pm I've had TMPHSMAX error pretty quickly when I had air in the cooling system. It took less than 1km driving to go over 85c. Waiting 30 seconds it went down, but quickly came back when starting to drive. Could drive only 100 meters and wait 30 seconds..

Did you manage to fix it?

Hi All,
Looking for help with the Tesla Small Drive Unit using a v6 board running software v5.27.

For some reason the tmphs keeps jump up when I floor the throttle and dropping back down when the car idles. It goes as high as 90 degrees for about 1 second then drops back down to about 38-45 ...

Hi All,
Looking for help with the Tesla Small Drive Unit using a v6 board running software v5.27.

For some reason the tmphs keeps jump up when I floor the throttle and dropping back down when the car idles. It goes as high as 90 degrees for about 1 second then drops back down to about 38-45 ...

I have for sale these parts ZEVA open source edition

EVMS3 ...170 eu (with precharge option for maximum 400v battery +40eu)
BMS24 ... 170 eu
EVMS monitor ...130 eu
can shunt interface 70 eu(not available now but could also be supplied under request)

Flashed with latest firmware.
Housing is home ...

KimchiKimKim wrote: ↑Thu Aug 31, 2023 7:42 pm All info to implement crc in code is documented in the 6803 data sheet memory registers.

Kindly request that you point me to the documentation as I can not seem to find these data sheet registers for the life of me.

P.S.Mangelsdorf wrote: ↑Sat Aug 19, 2023 9:32 pm Yes.
https://openinverter.org/wiki/CAN_communication

So just to be clear, and something that the documentation does not clarify, do I enter the custom value as the gain?