<![CDATA[M5 Stamp C3 -> Which Flash Mode to choose in Arduino IDE]]>Hey mates,

can someone point me out which Flash Mode i should use for the M5 Stamp C3 in Arduino IDE?
QIO, DIO, QOUT or DOUT

any help would be great !!

Thx & cheers.....

]]>https://community.m5stack.com/topic/4111/m5-stamp-c3-which-flash-mode-to-choose-in-arduino-ideRSS for NodeWed, 29 Apr 2026 03:33:33 GMTTue, 08 Mar 2022 13:52:40 GMT60<![CDATA[Reply to M5 Stamp C3 -> Which Flash Mode to choose in Arduino IDE on Fri, 04 Apr 2025 10:14:03 GMT]]>@Knobsi Hi, your question is already two years old. I guess you'll have found the answer, however I just came across it today. I want to share with you an experience I had yesterday:

Suddenly I encountered a problem after upgrading the Arduino IDE from v2.3.4 to v2.3.5.

The board that I use is an M5 Atom Echo which has an ESP32-PICO processor.

After compiling and building a sketch, that compiled, built, and ran OK with v2.3.4,
It crashed after compiling and building and running with v2.3.5.

In the crash report I saw "DIO".
In Arduino v2.3.5 I checked the setting: > Tools > Flash Mode.
I saw that the Flash Mode was set for: "QIO".
After I changed the setting Flash Mode it to DIO, re-compiling and building, the sketch ran OK.

Regards,
@Paulskpt

]]>https://community.m5stack.com/post/28795https://community.m5stack.com/post/28795Fri, 04 Apr 2025 10:14:03 GMT