Thank you very much for your help. I will give it a try.

Hello @BrandPlay does your M5Core2 turn on ok w/o the SIM800L stacked to it? If you are using the M5Core2 battery, it is fully charged? If you power your M5Core2 from USB, have you tried a different cable / power source? Thanks Felix

Hello Felix, thank you for your quick answer. I can ping sometimes and I cann't surf the Internet with my phone or with my computer and eth2ap-modul. I have changed the channel the softAP is using. Small changes in quality can be seen, but no significant improvement. I tried a different wireless client, for example my computer and my phone. I used a 12V/3A power adapter on LAN-Module with W5500. The M5Core2 and the LAN module also run stably with other applications and the same power supply. Bye, Uwe

@littlbee Hi, sorry for your problems with burning...frustrating to say the least! I would attempt to try repeating the process from another computer...is that an option? Let's try to figure out if this is a communication error or a Core 2 defect? Keep us updated!

Hi @felmue No, the example server works fine. You are right, it was probably an issue with csv reading. Thank you

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. [image: 1635894841146-30262b3f-767a-4ff9-a1f9-788ccb8fc733-image-resized.png]

Hello @daniel3344 maybe this old post might be helpful? Thanks Felix