ESP32 Based Chademo

[Bigpie]

I did have to put a jumper in.

It doesn't have any analogue inputs, but you could add. You could also change the code to not require any current/voltage monitoring and trust the values the charger is saying, if you so wished.

[Arlin]

I did have to put a jumper in.
IMG_20240914_101112862_HDR.jpg
It doesn't have any analogue inputs, but you could add. You could also change the code to not require any current/voltage monitoring and trust the values the charger is saying, if you so wished.

Oh what is the resistor for?

Edit I just saw its on the CAN so its likely a 120 ohm resistor right?

Thanks.

-Arlin

[Bigpie]

It is a can terminator on the second can

[Arlin]

hello everyone! Can I also ask a stupid question?
Can this device work with a hall effect current sensor? or on a regular 75 mv shunt?
Isabella's shunt is very expensive, it seems to me, in order to be accessible to the masses.

You will want to use a shunt. The problem with the hall effect sensors is they don't 0 well. Where as a Shunt sends 0 voltage at 0 current so its always calibrated

[Arlin]

If you connect to the ESP32 wifi network and the ip address will be 192.168.4.1

Ok back to this. I think I found the problem. Is default IP for ESP32 should be 192.168.4.1 But mine is not defining the default serial.
I added this in the INO file.

And got this in the serial printout on the Arduino screen.


Anyone know how to add a set IP address?

[Arlin]

ESP is picky regarding power supply. It usually crashes if the voltage drops due to high current consumption during WiFi transmission. Use a lab power supply or at least a shorter heavy USB cable.

I have tried a 100w USB wall adapter with a short and thick USB cable. I have also done the 3.3 jumper wire and run it from a 1000a 12v batter and the 3.3v rail was solid
It seems to be wifi settings and maybe something else as the wifi connection is not easy to make and seems to jump in and out.
Is there a Bluetooth thing to shut off? Maybe I will try shutting Bluetooth off in my PC

[Arlin]

Ok back to this. I think I found the problem. Is default IP for ESP32 should be 192.168.4.1 But mine is not defining the default serial.
I added this in the INO file.
image.png

And got this in the serial printout on the Arduino screen.


Anyone know how to add a set IP address? image.png

And changing it to this.

I got this.

[tom91]

Wifi starts further down. so only have it print the IP towards the end of the setup() section.

[Arlin]

Tried it this way as well. Still 0.0.0.0

Also do I need to change WiFi.begin("Beetle_CHademo", "Fia84grapu"), to something else?

Thanks

-Arlin

[Arlin]

ESP32-BMS.jpegScreenshot 2023-05-24 at 9.18.38 am.png Will this do? Wasn't charging, just sat on the drive.

In order for this to work do I simply log into the wifi that the board is displaying in the serial output?

I am getting stuck on this part. But I have been off of it for a while. I am just getting back to this now.

Thanks.

-Arlin

[Bigpie]

Sorry, I'm not really sure what you're asking.

[Arlin]

Sorry, I'm not really sure what you're asking.

Oh how to get the Web page to load from my PC so I can set the settings etc.

[royhen99]

Assuming you have the the same version as on github, connect your wifi to ESP32-CHADEMO, password ChadMeO.
Then access the web page at 192.168.4.1 which is the default IP address for the ESP32 web server.

[Arlin]

Assuming you have the the same version as on github, connect your wifi to ESP32-CHADEMO, password ChadMeO.
Then access the web page at 192.168.4.1 which is the default IP address for the ESP32 web server.

Thank you.