... almost always the result of an encoder problem, and if you are getting encoder errors then that re ... be the slip.

Losing connection between the ESP and the STM is a common problem, though I've never properly understood what causes it.

... initial spinup test is basically my whole setup and I need it to work flawlessly. But I have issues ... the sensor
I often loose the connection between ESP and STM

Here is a video in which I go over my parameters and setup:
https://youtu.be/IAvwltMA7Rc
If you have any suggestions or questions feel ...

This is great, seems to have fixed all of the ESP-STM comms issues I was having before with my zombie.

Also, I ordered the ESP32 with the CP2104 instead of the CH9102 and found it worked just fine on windows 11, drivers installed automatically. I just had to use this site https://espressif.github.io ...

After a reset of the stm via the oic-can-tool the webinterface shows the mapping of canspeed again ... than not get "Communication problem between ESP and STM" in the red banner at the top of the page.

Also no real motor spin yet. Performance inverter spun with about 2 °/s whilst drawing 20 A at 4 V ...

I just tested the Foccci with 12v, gnd and wake. There are some led lights and it looks alive. I connected CAN H/L to The ESP board that it came with and it says "communication problem between ESP and STM" i have CAN terminated on both devices.

There was a wiring issue and also the node was not set ...

I just bought a Mini Mainboard and ESP32 CAN Web Interface & datalogger - community edition. I thought I could communicate with the Mini Mainboard via ESP32 CAN, that's possible, right?
Does the Mini ... getting 'Communication problem between ESP and STM'
image.png
Is there anyone who can guide me ...

... post looking for help, here is a video guide I made of how to program the esp.

This video includes a small unboxing, troubleshooting, how to find new parts for the boards, how to set up your computer to flash the esp modules, flashing one, and getting it all working.

Project post: https ...

... I just received the package of the mini inverter and ESP32 CAN interface.
I connected CAN H to CAN H and CAN L to CAN L and powered 12v on the boards
Nothing else connected.
I am receiving the message " Communication problem between ESP and STM "
I tried changing the speed to 250 and back to 500 ...

I remember seeing somewhere that most of the problems are from the communication speed not matching between the ESP and the STM? Where do I set this in the ESP code? or tools? And to what number?

Hmm So using Grok I was able to add to the code to get it to change channels. But I have tried channel 6 11 and 13 as well as 1 and nothing is working very good. IN fact its all very Unusable. I am not sure what to do. Is there another way to set up the VCU? Can I make a USB connection or use a TTYL ...

... Arduino IDE - i get problems with partitioning and have mounting errors in debug.
It seems that ... for this, so guys who are not familiar with esp toolchain will have problems anyway.

I'll try to build freshest stm code from source this weekend and hopefully solder board to powertrain - just got ...

Thank you. I will look at this when I get home.

I'm not too sure but you can try this:

In the esp8266-web-interface.ino file of the esp8266-web-interface channel can to be "declared"
WiFi.softAP(server.arg("apSSID").c_str(), server.arg("apPW").c_str());

The syntax is
SSID, Password, Channel, Hidden?
So something like the below *should* work ...

One of the biggest problem I have ever had with wifi on Zom and other OI boards is if there is another accesspoint or wifi source in the vicinity on ... with a ARLO camera one of the neighbors must have?

How do I force the ESP to run on another channel? I have been looking at the INO file don't see ...

One of the biggest problem I have ever had with wifi on Zom and other OI boards is if there is another accesspoint or wifi source in the vicinity on the same channel. You can test this with a wifi scanner app.

Hi I have made progress. But as you can see in the video it doesn't seem like a great connection its usable but barely and never works on my phone. Anyone have any ideas on how to improve this?

... If I do any modifications on code, no communication between stm and esp

Boatloader problem?

I am dealing with these issues as well. It seems there is a problem with the stream from the STM to the ESP not staying consistent. I have tried 2 different ESP82 chips so far and 1 is better but neither work good enough for me to trust it.

Ok to make sure I am clear. I have mine working but it has issues. It works for a bit then gives the warning "connection problem between ESP and STM." I guess this is more likely a problem with RX and TX? Seems a LOT of people are having this problem.

I am dealing with issues with mine as well. I have some random ESP8266 and I honestly don't know which one to get. Non the less I feel I am close. I followed the settings in the video above but I see the readme in Arduino says to use different settings.

I had an ST-Link (believe it was a clone), but was able to reflash the Zombieverter. Took a bit of finagling, but it's all good, connecting and showing the latest 2.30 update.

Thank Gawd! Now it's time for some serious parameter settings.

I was able to solve the issue, I found out that I had a connection between TX and RX that some solder flowed on the underside of the pins that caused a short. I cleaned and put in new pins. Everything is good. It was going good. I had a connection and everything, but I made a huge mistake. While I was ...

Can you measure voltage on the D1 when connected to Zombie?

And a picture might be helpful

I'm still having this issue. Even with new ESP and soldering reflow of the pins.

I have installed a new D1, made sure all the solder was solid on the pads, and still no handshake from the Zombie. I can access the network interface when the ESP is powered by itself, but once on the Zombie, and yet I ...

I'm having this very issue still. ESP will show the network and web interface just fine, when powered alone. But once I plug into the Zombieverter, I get no such connection. I get activity lights and ESP board is powered, but don't know why there isn't a handshake between the Zombie and ESP for me to ...