another user reported maybe same problem in espressif github.

https://github.com/espressif/arduino-esp32/issues/1726

Japan Seller Switch-Science announced that problem.
https://www.switch-science.com/catalog/3953/

their says "cut the GPIO 16/17 pins". that correct?

@bin i just tried, burn PSRAM version firmware.
does not boot.

thank you for replying.
i tried DIO mode and 32Mbit Flash Size, and non PSRAM(m5cloud-20180516-v0.4.0.bin)firmware to boot device.
PSRAM firmware some bug? or my M5Stack FIRE is non 4MB-PSRAM 16MB Flash version?

i confused...

hello.

i'm buyed yesterday M5Stack FIRE on MFT2018.
default stock rom seems to good work.

but, after M5Cloud-PSRAM rom flashed, does not boot.
(no display, maybe power-on. can hear speaker noise.)

rom: m5cloud-psram-20180516-v0.4.0.bin
flash download tool settings:

any idea?

best regards.