It sounds like the battery may be dead or disconnected internally. Warning 22 usually points to a battery issue. Since it powers on with USB but not on its own, try opening the case carefully and checking the battery connection. If that looks fine, the battery might need replacing. You could also try a full reset by holding the power button for 6–10 seconds.

@coolman861263 Please follow this instruction and see if helps: Observe whether there are any obvious physical damage marks on the device. Install the device driver: Windows: https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/drivers/CH9102_VCP_SER_Windows.exe macOS: https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/drivers/CH9102_VCP_MacOS_v1.7.zip Connect the device using a USB cable and open the device manager. Check whether the device manager page refreshes when the device is inserted, and whether a new device appears in Universal Serial Bus controllers. If not: If you are using USB C to C cable: First disconnect the StickCPlus, turn off the device, and then plug in the cable (press and hold the power button until the green light turns on to indicate that it is turned off). Or replace it with an A to C cable. If you are using USB A to C cable: "Try to change the data cable", "Try to reinstall the driver", "Try to change the PC". Reburn the factory firmware: https://docs.m5stack.com/en/guide/restore_factory/m5stickc_plus. The screen is still black after burning: Press and hold the leftmost button until the green light inside turns on, then plug in the USB cable Observe whether the screen is black but has a faint backlight, and whether there is a beep sound when pressing the button

Still no Mic in 2025, in UIFlow2!

In my case I was able to overcome the issue by configuring a DNS resolver and uploading the code via USB import network # set CloudFlare DNS resolver network.ipconfig(dns="1.1.1.1")

Hello @xxx_yyy I stand corrected. My apologies. You are absolutely correct: IMU INT in M5StickCPlus2 is not connected to anything. (I was looking at the RTC INT.) That said - and to answer your original question - yes, it is possible to connect the IMU INT pin to an ESP32 GPIO. Please see here. However it would only allow to wake ESP32 from deep/light sleep, but not to turn M5StickCPlus2 back on from being powered off due to the fact that IMU is powered from 3.3 V (and not like RTC from VBAT_IN). Thanks Felix

@mali-draper use M5burner and load latest firmware for M5StickCPlus

for start install M5Burner, connect your M5StickCP2 via usb to pc/laptop and observe if it will detect com port, from M5Burner you can then load latest firmware for your device.

I bought and tested an I/O expansion unit called U011-B. As a result, I was able to successfully read four I/O signals from the M5StickC Plus from U011-B during using WiFi.

@xter-pokemon Allways erase before burning, and triple check you have the correct version of the firmware for the correct controller version.

@felmue Works for me too! I never thought of that for StickCPlus2 !!! Thanks

Use M5Burner to erase the firmware and burn the correct UIFlow version for the stick

@MadMackz said in New to M5, Lesser known firmwares, forums , or knowledge bases?: Hey, new to M5, just curious if anyone would like to share some lesser known forums and or firmwares that would be cool to check out,,, Pentesting, :hacking:, whatever. Interested in remote access and control stuff. This is what you have said /\ and this is what we don’t support /\ due to the potential legal issues that’s involved, it has nothing to do with authority, it’s about protecting the forums and company products. You start by saying you are new and so before you move on to more advanced projects you need to learn the basics first or you will become stuck due to problems and issues later as people start n this forum has already encountered by not learning the basics first. As to your second request, the Japanese members have looked into those and have projects based on them.

yes like that. When I use the device 5 min ,its charge drops to 85%. But when I turn off the device completely, there is no problem and the charge remains the same.