@kuriko
Thank you for your hint. However, I don't know how it could help to solve my requirements.
In M5StickC-Plus example, IMU will remain powered on and will send interrupt on gpio 35 on motion.
In my requirement, axp2101 could send interrupt on power-on (usb), but its interrupt pin is not connected to esp32.
AXP2101 usually wakes up esp32 by simply powering on esp32, it is not a real wake up by interrupt. Therefore, wake up by power-on (usb) works only if esp32 was powered off by axp2101 previously. I cannot power-off esp32 because it should also wake up on gpio interrupt from PIR.

@ajb2k3 I haven't, but just did!

for Hive MQTT below works for me Uiflow 2.2.5

mqtt hive m5stack.PNG

Hello @Krmiller

GetVBusVoltage() exists in M5Core2 library as well. See here.

Thanks
Felix

@pleister found the solution in rebuilding the extension https://github.com/curdeveryday/vscode-m5stack-mpy/issues/45

Hi all,

I have been looking for the answer to my problem and my best guest might be the fact that they both are using PortA, thus the competition.

Is there a way to switch from one sensor to another to get a reading from both?

Thank you in advance :)

@paulasousa it may be a cause of code changes in the libraries. You need to check the documents for the update records.
Probably better to rebuild from scratch

@perlix
Hi, are you sure to remove the line 'Serial.begin(115200);' in setup() and not change it to 'Serial.begin(9600);' or something else? I remove this line and compile it , a lot of error occured. Any advise. Thank you.

What about M5CoreS3? Doesn't seem to have BL pin defined. Can it be used with TFT_eSPI?

@JourneymanWizard No, I'm saying that not all cables are power+data. some cables are data only.
Also for some reason I have noticed that cables of late have a high failure rate (conductors breaking.
You are a core3, Have you pressed the boot button?
Another thing I have also noticed that I have to use a USB hub between the device and the computer for some reason.

Hey everyone!

I know this is old but if someone stubles across this like I did here's the fix...
I'm running MacOS Sequoia 15.2. To get rid of this error you have to do a couple of things:

Install xcode from the app store. VERY IMPORTANT Open xcode from your Applications menu and answer all of the questions (install the version for MacOS). If you don't do this xcode isn't installed even though you installed it from the app store. Download and install the appropriate driver. For most it's CP210x. I did a reboot after installation Download m5burner and install it.

This worked for me. I noticed the first time I did a burn it took a long time, but part of that is I was using UIFlow2.0 with all of the account binding stuff.

Hope this helps!

I had this. Take it apart, disconnect battery, wait a minute or two, plug it back in. Something in the pmic is buggy and this resets it then it works.

@IndianaTux
this works on my CoreS3, directly turns off LDO2

#include <M5CoreS3.h> #include <Wire.h> void setup() { // put your setup code here, to run once: Wire1.beginTransmission(0x34); Wire1.write(0x12); Wire1.write(0b01001011); // LDO2, aka OLED_VDD, off Wire1.endTransmission(); }

@raeph
maybe these codes will help:
https://github.com/m5stack/uiflow-micropython/tree/master/tests/bluetooth

Hello @laursena

unfortunately I don't know the answer to your question about the power consumption and if M5Core2 can handle it.

However what I can tell you is that you do not necessarily need the PaHubs. The M5Stack I2C weight measurement units allow for the I2C address to be modified - so you could give each unit its own I2C address and simply connect them in parallel.

Thanks
Felix

I faced the same problem with M5 Stack Core2.
It was not connecting via USB no light was turning on when connected to USB.

Here is what I did

Disconnect the device from USB port of your computer Now you have turn off the device. It is hard since your don't know whether it is on currently or not and connecting USB will turn in on automatically. So connect it to USB once. Then disconnect it again, now you can know device is on. Not press the power button for 10 seconds it will turn off the device. Remove the pin cover from the bottom of the ESP32. Using a wire connect G0 to any GND ping Now plugin the device to the computer
You should see the device now.

Use this opportunity to flash a good program into the device. Now remove the wire between G0 and GND and restart your device.