@ren072 Sounds like the battery has expired, this is an older StickC!
It happened to me and later on a StickC Plus.

The green icon likely means the device connected to flow.m5stack.com successfully, but the API key connection might need extra steps. First, ensure you entered the API key correctly in UIFlow Web. Also, check if your firewall or network settings block the device from appearing in Fritzbox. For logs, try enabling debug mode in the M5Stack settings or use serial output to inspect connection details. Sometimes, the device uses a separate network interface that Fritzbox might not show. Double-check your Wi-Fi credentials and restart both device and router.

It sounds like the Core2 isn’t maintaining a stable connection with UIFlow. A few things to try:

1. Reflash the firmware with the latest stable UIFlow_Core2 version using M5Burner, and ensure "Internet Mode" is selected. 2. Double-check that the Device Name/API Key in UIFlow matches what's shown on the Core2 screen. 3. Disable any firewalls or antivirus that might block the connection. 4. Try using UIFlow Desktop IDE instead of the web version for better stability. If issues persist, test on another PC to rule out local system conflicts.

It looks like you're missing initialization for the IMU sensor. Try adding Imu.begin() inside the setup() function after M5.begin(). Without this, the sensor may not start properly, leading to zero readings. Also, ensure you're using the latest firmware and that the device isn't in USB mode, which can disable sensor updates.

There isn’t an official Eagle or DXF file publicly available for the ATOMIC Proto Kit layout. However, you might find community-made resources or footprints in forums or GitHub repositories related to ATOMIC boards. Alternatively, you could create your own PCB layout by measuring the board dimensions and pin headers manually.

This error usually means the Arduino IDE can’t find the esptool utility required to upload SPIFFS data. To fix this, try these steps:

Ensure you have the latest ESP32 board package installed via Board Manager. Restart the Arduino IDE after installation or updates. Check your system PATH environment variable includes the path to esptool (usually inside the ESP32 package folder). If the problem persists, try reinstalling the ESP32 core or upload SPIFFS data using the command line with esptool.py directly.

The W5500 Ethernet library for Arduino does not natively support setting a DHCP hostname in its standard implementation. If you're using Ethernet.h, it lacks this functionality. For advanced DHCP options like hostname, consider using the EthernetENC or UIPEthernet library, which offer extended DHCP support. Alternatively, you’d need to modify the DHCP client in the library to include the hostname in the DHCP request packet manually.

So no solution for the moment ?

@wwhite Did you plug the UNIT into the red socket on the left side?
These inputs are: 21 and 22.
You could plug it into the discrete I/Os around the base on the right side where you will find 26 and 36.

9d225eb7-4ca3-472e-84ba-5d7b31421c06-截屏2025-06-08 10.38.39.png
Finally it works on UIFlow2.截屏2025-06-08 10.38.39

@nemelesic "Bruce" is hacking software and such is illegal.

Thanks for the update, ajb2k3. Good to know a full overhaul is in the works, that should deal with navigation and finding the right topics. Looking forward to seeing how it improves the forum experience.

@Boomvalt Xcode is OSX's dev environment and is needed for some low level functions needed for hardware programming even if you are not directly using it.

They need to be in close proximity. The magnet is on the outside of the case so it should be possible to get it off without opening it. On the inside there would just be the back of the plastic indentation.

I will try grinding a part of the edge of the magnet away with a dremel tool and then prying the magnet out with a screwdriver, but I am concerned about breaking the case, but I hoped someone else may have done it.

@felmue Finally got it working correctly. In addition to your code, I initialised the Pahub, and then changed the dip switch to 0x71. Additional units work fine when assigned to 0x71.
Thanks for the help!

Hi guys

I now have the LTE-M modem fully integrated into M5Tab5 (including proper external antenna). Info here.

Thanks
Felix

@sgflux

I measured the voltage of the ‘5V pin’.
With the V2.4 I get 5 V,
with the V2.7 only 4.7V.

Could this be the reason why it only charges with a maximum of 150 to 200mA?

How can I increase the voltage output of the IP5306?

Is this possible via i2c?