FIXED: My mistake was assuming the "Configurations" button was essential. If I ignore than and click "Burn" everything is fine.

Hello @Veto6017 hmm, with an M5Stack Fire (HW: 2018.2A) running your code I get "Power canControl OK". Have you tried to run I2C_Tester.ino? The I2C scan finds 0x10 (BMM150), 0x68 (MPU6886) and 0x75 (IP5306). Thanks Felix

Edit: is there any limit in size for the SD cards ? if so, what is it ? Best regards, C.A.

Hello @codewitch have you tried keeping it plugged in for a while to charge the battery? have you tried to run it w/o battery, e.g. with the M5GO bottom removed? Thanks Felix

@ajb2k3 thank you!

Is the ENV III plugged into the red port?

@ajb2k3 No it's not a Grove pin. Check here: https://github.com/m5stack/m5-docs/blob/master/docs/en/core/fire.md

Right, OK, nobody panic! There is a bug somewhere that causes a random boot loop to appear in the ESP32 and strangely I had this with a Stamp the other weekend. Disconnect everything and leave the controllers unconnected for a while, cold boot the computer and try and flash UIFLow firmware.

Hello had the same problem. Solution with me, Use an older 5V USB power supply. The new ones switch off due to insufficient power consumption. Motorola review 2020 low A. = off Samsung v. 2015 no problem. Try old power supplies without high-performance charge control. 73/ Klaus

Hey robalstona, Thanks for your answer. You are right this could be the problem. I will try it out in the near future. cheers, Mathias

Solved comment M5stack.h: //#include <M5Stack.h> #define M5STACK_MPU6886 thx

Hello @anichang just wondering - maybe the issue isn't specific to PSRAM but with the power supply? I'd try a different power supply and/or shorter USB cable. Thanks Felix

1st thing to do is DON'T Panic! Next remove the base and module leaving only the firecore. Plug a usb cable in and connect just the core section into a computer, go into hardware reports and check usb devices. Do you have a USB to UART adapter? Try the instructions on this page to use an external adapter https://docs.m5stack.com/#/en/tool/usb_downloader?id=esp32-downloader

@uniko92 Firmware on the Fire is really old. Please use M5Burner to upgrade it to 1.7.4.

@m5stack , @ajb2k3 sorry but any ideas?