@felmue said in Core 2 and COMMU:

I agree, it can be a bit frustrating at times but on the bright side you will probably learn some new skills, like reading and understanding schematics.
I am positive you'll figure it out.

Of course, I have been playing with Arduino and ESP8266 / 32 for 3 years and several years ago with the PIC16 ... and all my pleasure is to learn and to discover.
I have already read many schematics and created myself some PCBs for my project.
Thank you Felix

Hello @felmue

@felmue said in Core 2 and COMMU:

just to be clear. You are able to flash your M5Core2 as long as the COMMU module is not connected (stacked) to it, correct?

Yes that's right.

About COMMU jumpers it's not very easy to find information about it. Not easy also to find them on the board whithout a good magnifying glass. I found a picture on the net more easy to read.
And when I bought the COMMU, I didn't think I had to understand the schematic. I thought it was more plug & play as the presentation suggests.
Anyway thank you very much for your help. I will persevere.
Didier

@zontex Without COMMU of course no error but with COMMU I have this one

Start Burn

--chip esp32 --port COM3 --baud 921600 --before default_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x1000 D:\F - Locoduino\M5Stack\M5Burner\packages\fw\core\UIFlow_Core2-v1.7.0-core2.bin

esptool.py v2.5.0
Serial port COM3
Connecting...
.

Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse
MAC: 84:cc:a8:60:ed:ac
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Warning: Could not auto-detect Flash size (FlashID=0xffffff, SizeID=0xff), defaulting to 4MB

A fatal error occurred: File D:\F - Locoduino\M5Stack\M5Burner\packages\fw\core\UIFlow_Core2-v1.7.0-core2.bin (length 8376320) at offset 4096 will not fit in 4194304 bytes of flash. Use --flash-size argument, or change flashing address.

Burn Failed

@zontex Hello,

I try with the USB cable delivered with Core 2 or one of mine, nothing change.
Didier

Hello,

I recently purchased an M5Stack Core 2.
I want to use it with the Arduino IDE in its latest version (Windows 10) .

I try to run example touch.ino while choosing board "M5Stack-Core-Esp32" or "M5Stack-Core2".

if I add the COMMU extension (I need the CAN Bus) I get the following error message regardless of the card:

Configuring flash size ...
Warning: Could not auto-detect Flash size (FlashID = 0x0, SizeID = 0x0), defaulting to 4MB
Compressed 8192 bytes to 47 ...
Writing at 0x0000e000 ... (100%)
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.0 seconds (effective 21845.2 kbit / s) ...

A fatal error occurred: Timed out waiting for packet header

No solution found on internet.

Thanks for your help.

Didier

Hello,
I recently purchased an M5Stack Core 2.
I want to use it with the Arduino IDE in its latest version (Windows 10) which I have been using for several years, notably with the ESP32. I have a current project with the ESP32.

I installed the board and the libraries.

Then I have to choose the card either
Board "M5Stack-Core-Esp32"> M5Stack Arduino> M5Stack-Core-Esp32

or
Board "M5Stack-Core-Esp32"> M5Stack Arduino> M5Stack-Core2

With the touch.ino example sketch.

The first card compiles and works fine but I cannot access the board settings.

The second compiles correctly but nothing appears on the screen: black screen. Just a bright flash. And this regardless of the compiled program.

Of course I carried out long research on the internet and found no explanation.

Thanks for your help.

Didier