Board definition

1

Hey.
I am trying to make a project using platformio for my M5Stack Core module.
The PCB in the module states:
V2.61
2021-0907
I suspect that it has 16Mb flash.
If I run the code:

uint32_t flashSize = ESP.getFlashChipSize();
Serial.printf("Flash size: %d bytes\n", flashSize);

I get:
Flash size: 16777216 bytes

But when I compile i get:
PLATFORM: Espressif 32 (2023.7.0) > M5Stack Core ESP32
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash

I suspected this had something to do with the platformio board definition - here is the ini file I had:
[env:m5stack-core-esp32]

platform = espressif32

board = m5stack-core-esp32

framework = arduino

So I tried to use “m5stack-core-esp32-16M” instead. I even tried to create a new project, and chose this board, but this keeps telling me that this is an unrecognized board…??

2

There are 2 board versions for the M5 Stack core ESP32 available:
m5stack-core-esp32 and m5stack-core-esp32-16M

This info comes from the board manifest while this info

comes from a “hardware inquiry” during runtime.

If your hardware has the 16 MB version use board = m5stack-core-esp32-16M

3

Thanks, but unfortunately you miss the last point:
It seems that board = m5stack-core-esp32-16M is not recognized, even though being an option - meaning:
For example, if I create a new project through platformio, I have the name, board and framework selections. Lets say I chooose “testie” as name, and “M5Stack Core ESP32 16M” as the board, and Arduino as framework.
When I click finish I get this message:
Could not initialize project

PIO Core Call Error: “The following files/directories have been created in C:\Users\NotMyName\Documents\PlatformIO\Projects\testie\r\ninclude - Put project header files here\r\nlib - Put project specific (private) libraries here\r\nsrc - Put project source files here\r\nplatformio.ini - Project Configuration File\r\nResolving m5stack-core-esp32-16M dependencies…\r\n\n\nUnknownBoard: Unknown board ID ‘m5stack-core-esp32-16M’”

4

In project boards folder you can create json for custom or alternative board configs. Then new board name use in ini.

6

I’m sorry, you’re right.

For me, choosing the board works perfectly without issue.

I guess your platform or package files are broken. In this case

  • Close VS Code
  • delete C:\Users\<username>\.platformio\platforms
  • delete C:\Users\<username>\.platformio\packages
  • delete C:\Users\<username>\.platformio\.cache
  • restart VS Code and wait until all tasks are finished (reinstalling the missing files)
7

That worked! Thanks a bunch :slight_smile: