Hello @felmue,

thank you very much.

I changed in the file Kconfig.projbuild the range of parameter EXAMPLE_ETH_SPI_MISO_GPIO to 38 and used your values. It worked fine.

Ethernet Type (W5500 Module) ---> (1) SPI Host Number (18) SPI SCLK GPIO number (23) SPI MOSI GPIO number (38) SPI MISO GPIO number (26) SPI CS GPIO number (5) SPI clock speed (MHz) (34) Interrupt GPIO number (19) PHY Reset GPIO number (1) PHY Address

My challenge was that I hadn't used the Core2-values the last time I made changes. I overlooked this.

Bye,
Uwe

Hello @jdonth

happy to hear it finally works for you. Thank you for letting me know.

Happy New Year!

Felix

Just answering to myself :)

I spent the whole day digging into LVGL lib on the Core2.
I must say there's a huge learning curve for me (I'm just a hobbyist with just average knowledge).

I initially thought it would be very easy to use but this is definitely not the case (again, for me).
However I am happy because I guess I have understood the basic concepts and I was finally able to diplay objects like buttons or sliders on the screen and interact with the touch display.

This library is incredibly powerful. The fact that I am playing with others devices than M5Stack stuff motivates me to keep on investigating as I will be able to use it on almost any other screen devices.

Would be great to use this post if you want to share your experience with LVGL and the Core2.

@ajb2k3 As I mentioned in the other post my code is written in C (VSCode + PIO) however I would like to try Micropython for my next project M5Stuff project :)
Can you please tell me more about your guide? Is it possible to buy it somewhere? is it the same as what is mentioned in your signature: UIFlow handbook? I would be very much interested, thanks!

Yes you can, I am starting playing with my Core2 and could load a jpg image loaded in the SPIFFS using the SPIFFS.h
Cheers
Eric

Thanks @felmue. Thanks for taking the time to post back :-D... Luckily for me I'm bogged-down in user interface shenanigans (reading/processing/displaying touch inputs) so I've not really had time to look more closely at the library. I'm only a novice (noob) programmer in that I've not done it for over 25 years now LOL

But sadly it means it's hard for me to understand the source files sometimes. Which is why it's a shame there isn't any documentation about the library.

I'll have another stab at understanding it when I get my touch/UI sorted out a bit better.

Thanks, Minxster

@ankurj77

You will find in another post interesting information given by ROBALSTONA

https://community.m5stack.com/topic/3782/waterproof-temperature-probe/5

Hello @mu0104

that doesn't sound right. I have an M5Core2 which is solely powered via the 5 V input from the stacked COM.X module and the communication between the two uses Serial2 (aka GPIO13 and GPIO14) successfully.

Do you care to share your code?

Thanks
Felix

Hello @mu0104

according to the M5Core2 schematic the battery is controlled by the AXP192. I suggest you to consult the AXP192 datasheet.

Thanks
Felix

Hello @rin9147

no, you can but you don't need to remove the pullup resistor. If you read GPIO32 like this it will report HIGH and when you connect GPIO32 to GND with a wire is should read LOW. Use below code to set GPIO32 as input and do something when it is read LOW.

pinMode(32, INPUT); if(digitalRead(32) == LOW) ...

Thanks
Felix

I set it up based on what you said and it works.

I noticed later that m5-docs had the same thing.
I'm glad you explained it in detail. Thanks.

Hello @rmetzner49

try without the extra Serial.begin(115200). By default Serial gets already initialized when the M5.begin() function is called. I've seen things go wrong before when Serial is initialized twice.

Thanks
Felix

Yes it makes sense! Made a table to help other users.

For the USB module... The Core2 does not power the 5v bus line until the ax192 is initialized.. and the USB module without power holds the reset line down preventing the esp32 from starting.

Thank you very much.

0_1635894840318_30262b3f-767a-4ff9-a1f9-788ccb8fc733-image.png

Hello @daniel3344

maybe this old post might be helpful?

Thanks
Felix

Are you sure that your computer has connected to the the M5-520 access point using your computers wifi manager?

IF you not able to access 192.168.4.1 it means

you are not connected to the M5Stack device, you may need to refresh the firmware using the M5Burner program.

I have the same problem with my Core2. Followed the demo in every step. And I am using the latest version (beta web) and newest firmware.
Could you please send me the m5f, too?

Addendum:
The components close to the MBUS connector also get in the way of the original bottom, if fit to the GPS module.
So I am afraid there is not really a practical solution.