Flash issue ESP32-PICO-MINI-02

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1

Hello,
I recently switched from TTGO-Micro32-v2 to ESP32-PICO-MINI-02
But I can’t make it work; basically, I can’t run any code on the chip!
Most likely it is not anything to do with PlatformIO

When I connect the MCU to the PC (USB bridge) in the terminal MCU endlessly prints this

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
invalid header: 0xffffffff

After burning a very simple code (I use PlatformIO), I get slightly different errors as follows

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1184
load:0x40078000,len:12812
load:0x40080400,len:3032
entry 0x400805e4

When I try to erase the flash, it seems everything is working just fine!

Connecting...................
Chip is ESP32-PICO-V3-02 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, Embedded PSRAM, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 30:83:98:d0:1c:b0
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 5.1s
Hard resetting via RTS pin...

Could you please help me to find out what would be wrong?

2

Does it work in the Arduino IDE? Under which settings if yes?

What is your platformio.ini?

3

I seem to have a similar issue.

@rezza - did you try to setup you platform.io with 8MB flash size?

4

I am having a similar issue though realized a bit differently. I think Platform IO’s characterization of the ESP32 Pico Mini 2 chip maybe incorrect?

I can built my code but when it goes to load Platform IO reports code is too large for flash memory. The build is 1.3MB, yet the Pico Mini 2 has 8 MB of flash memory.

Has anybody been able to find a workaround?

Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
Error: The program size (1360381 bytes) is greater than maximum allowed (1310720 bytes)
RAM:   [=         ]  14.6% (used 47688 bytes from 327680 bytes)
*** [checkprogsize] Explicit exit, status 1
Flash: [==========]  103.8% (used 1360381 bytes from 1310720 bytes)
=============================== [FAILED] Took 37.29 seconds ===============================

UPDATE: THIS POST FIXED ISSUE ~

5

This post is almost 2 years old and your problem is different. It would have been better to create a new post.

There is no “characterization”. It depends to the board settings in your platformio.ini - which you did not show.

The ESP32-PICO-MINI-02-N8R2 is a chip and not a board and comes with 8 MB Flash and 2 MB PSRAM.

The default partition table defines 1310720 bytes for the sketch partition. This is 49661 bytes less than your sketch needs.

You can change this size by either selecting a different (suitable) predefined partition table or creating your own custom partition table.

The default_8MB.csv defines 3342336 bytes for the sketch and should match your needs.

See