<![CDATA[Unable to load new FW from Arduino IDE.]]>I had no trouble with previous devices from CORE2 (2 test units), I did order 20 units to proceed, but none of them work.
I have donde even a very simple Arduino Program with no luck, also tried my original program that is working with the 2 initial units

__
It thorws this exception:

ERROR A stack overflow in task IDLE1 has been detected.
abort() was called at PC 0x40088bfc on core 1

//#include <M5Core2.h>
//#include <M5Unified.h>
void setup() {
  Serial.begin(115200);
  //M5.begin();
  Serial.println("f(setup)");

}
void loop() {
  //M5.update();
}

ELF file SHA256: 0000000000000000
Backtrace: 0x40088974:0x3ffba560 0x40088be5:0x3ffba580 0x40088bfc:0x3ffba5a0 0x4008a4de:0x3ffba5c0 0x4008be74:0x3ffba5e0 0x4008be2a:0xa5a5a5a5
Rebooting...

]]>https://community.m5stack.com/topic/5160/unable-to-load-new-fw-from-arduino-ideRSS for NodeWed, 29 Apr 2026 02:45:54 GMTTue, 28 Mar 2023 02:07:35 GMT60<![CDATA[Reply to Unable to load new FW from Arduino IDE. on Tue, 28 Mar 2023 14:00:23 GMT]]>@teastain This is en backtrace decoded:

PC: 0x04d25826
EXCVADDR: 0x04d25824

Decoding stack results
0x40090d71: prvIdleTask at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/tasks.c line 3382
0x4008f5b6: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

]]>https://community.m5stack.com/post/20467https://community.m5stack.com/post/20467Tue, 28 Mar 2023 14:00:23 GMT<![CDATA[Reply to Unable to load new FW from Arduino IDE. on Tue, 28 Mar 2023 12:15:21 GMT]]>@teastain This is not the problem. I have tried with the original code that is working on other 2 units and does not work also.

]]>https://community.m5stack.com/post/20464https://community.m5stack.com/post/20464Tue, 28 Mar 2023 12:15:21 GMT<![CDATA[Reply to Unable to load new FW from Arduino IDE. on Tue, 28 Mar 2023 04:36:28 GMT]]>@fbritop I would put a delay(100); in the Loop:
You can get a race condition where the scan time is shorter than the esptool reaction and it could be "too busy" to stop and upload.
If this is the case it will take some finagling to reset the upload mode.
Usually just pressing the reset key on the top side, at different times until you get in time.

]]>https://community.m5stack.com/post/20460https://community.m5stack.com/post/20460Tue, 28 Mar 2023 04:36:28 GMT