I think there is a design issue with the buttons as I have seen a few places (not just m5stack) that have these fail, I also have one failed.

Hey good afternoon

I am trying to use also the LVGL and its charts on the Core2.
I have the version 1.9.2 installed.

I have created an example, which should work.
The API documentation i have linked, documents other functions as implemented.

import lvgl as lv

chart = lv.chart(lv.scr_act())
chart.set_size(200, 150)
chart.set_type(lv.chart.TYPE.LINE) # Line Mode

chart.set_point_count(20)
chart.set_y_range(lv.chart.AXIS.PRIMARY_Y,0,120)
chart.set_style_local_line_width(lv.chart.PART.SERIES,0,1) #Line Width of Dataserie 0
chart.set_style_local_size(lv.chart.PART.SERIES,0,1) # Point Width

ser1 = chart.add_series(lv.color_hex(0x000000)) # Add data serie

chart.set_next(ser1,1) # Set next points on ser1
chart.set_next(ser1,2)
chart.set_next(ser1,10)
chart.set_next(ser1,10)
chart.set_next(ser1,10)
chart.set_next(ser1,10)
chart.set_next(ser1,10)
chart.set_next(ser1,30)
chart.set_next(ser1,70)
chart.set_next(ser1,110)

Late response, i know, but i hope it helps you.
Best regards

@ajb2k3 thank you very much.

Glad you got things working, out of interest, are you running with tasks/threads? I'm working on a project that is reading and writing to an SD card, and luckily I've not had this problem yet. But I may implement what you've found just to be extra safe.

I don't know if you got this sorted, but we're not really supposed to user core 0, as this can cause panics. That's advice from Espressif. Also, adding in a delay @felmue said should really help in allowing the thread to free-up some cycles.

Hi @mbunds

Thanks for feedback and sorry for this,actually the UIFlow desktop version not updated for a while,we are aim for web UIFlow current, and plan release the new UIFlow(we call it UIFlow 2.0).

@felmue Thank you, I forgot about that. It’s a perfect work around to what I’m trying to do. Ideally not install anything on remote machine but you gotta do what you gotta do sometimes.

I take it from the FW 2.0 post that it could be connected to the 2.0 update

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