I recall loaded a v5 file, then the stm32 file on the charger.

And on the esp, yes I soldered to flash and then unsoldered which gave me the latest screen I posted.


Looks like your esp is sorted.

when programming an stm with any of the oi firmware, you need to upload the bootloader first. Then the ...

There is too many threads on this already, locking up
search.php?keywords=+ESP+and+STM

same issues here. Sometimes it shows the same message with my setup (Zombie + Leaf Gen2).
It seems to reconnect by it self so never had problems with it but I wanted to +1 this issue.

Interesting. Are you turning on power to inverter and ESP simultaneously?
I wonder if it times out fetching the serial number or something. Then when changing speed or node id the request is repeated and all is well.

Yes, changing the node Id and back also does the trick, and faster then changing the speed.

Thank you for the replies, at the moment the LDU is turning how it should and we have a relaible methode to acces the interface.

Small update: When changing the speed from 250k to 500k, the error disappears and the interface works. However, when I start the interface at 500k, it does not work and the error remains. Is there a specific reason for this?


So it probably also works when changing Node Id to something else and ...

The resistance between CANH and CANL is 60 ohms and at the moment it is only the logic board and the esp module on the CAN circuit

What is the resistance between CAN H and CAN L? Is there anything else on the CAN circuit?

Small update: When changing the speed from 250k to 500k, the error disappears and the interface works. However, when I start the interface at 500k, it does not work and the error remains. Is there a specific reason for this?

The resistance between CANL and CANH is 60 ohms, the grounds of the esp and the ground of the motor are connected. If I measure the voltage from the ground of the esp module and the CANL or CANH I get 2,3Vfor both. If I check the CAN lines with the oscilloscope I also get the same value of on bothe CANH ...

So Johu was kind enough to confirm the STM32 code was https://github.com/jsphuebner/stm32-teslacharger .

I downloaded and compiled the code and tried to upload using the wifi interface but unfortunately no luck.

Looks like I'm now facing the "Communication problem. between ESP and STM" issue. The wifi ...

In this case the first check is the physical connection:
Resistance between CANH and CANL between 60 and 120ohms? Grounds connected? Do you have an oscilloscope to check the CAN lines? Baud rate correctly configured?

It is connected via CAN.

Is the ESP connected via CAN or is it directly on the inverters logic board?

... I'm a student from UHasselt in Belgium and for my master thesis I'm converting an Opel ... store. After connecting the logic board and the esp I am unable to see the LDU data on my laptop. I keep getting the "Communication problem between ESP and STM" error and don't know what the problem is ...

... board firmware or the wifi firmware? Is this why there is a Connection problem between ESP and STM?

An update ..
I have finally found a way how to read and write the hidden parameters.
Solution: using openinverter can tool and sine.5.24R parameter database.

The car is finally running, thank you.

:idea: Interesting note:

Also reflashing the same firmware over and over never solves a problem ...

Hello Johu,

thank you for your response.

I tried uploading your firmware. The WEBUI reported that it ... 5.35 release again (which took a few seconds), and now the CAN mappings work!

The communication error between the ESP and STM still occurs, but not always. When it happens, I power-cycle the ESP Wi-Fi ...

... the next mapping until you receive an abort.

Now I went through the logs and found there was a fix specifically about deleting CAN mappings. This ... web UI until you get the "failed" message. Then power cycle inverter and ESP module but LEAVE the UI open! Then do NOT hit the browser refresh button ...

... running firmware sine-5.35, connected to an ESP32 WiFi module.

**Problem 1)**

I've had an ... the message: "communication problem between ESP and STM".

For the last 4 days, I haven't been able to make it work at all. The ESP32 always stops communication after receiving this specific response ...

I recently received six ADC16 BMS boards and an ESP32 board from the OpenInverter shop. For testing, I connected one BMS board following the instructions on the wiki:

ENAL_IN and 12V connected to a 12V ... error:

"Communication problem between ESP and STM"

Could you please assist me in resolving this ...

... me. There seems to have been goo splashes, and the circuit board looks to not be damaged. So replaced all 4 wires with proper automotive cables and pins. Connected up with the same Esp-Stm coms message. Could the fact that the adapter board has a very old firmware as apposed to the Esp be causing ...

... issue at the moment is around connection between Esp & STM.
If there is doubt about the ESP board, is there a "simple" way to say put the web interface on my arduino due and connect that to my adapter board?

... webpage

Communication problem between ESP and STM

I upgraded my zombieverter just recently to 2.22A., (previously running 2.15)

If i am lucky the issue disappears after a minute or so. Worst case I repower the zombieverter and refresh the webpage.
Did i break anything with the 2.22 update ...

Binary attached.


Flashed in that FW and now my Web interface is showing strange things:
When I ... an error message "communication broblem between ESP and STM". Inverter messages in the dash show "STOP - OVERCURRENT".

I even soldered an extra 22uF ceramic capacitor on the ESP 3V3 supply to filter ...