Lvgl and network error with micropython on ESP32 in v7, ok in v6

[amirgon]

Hi @sornen

@sornen

The error appears to be due to a buffer allocation fail.

If memory allocation is the problem, you can try a few things:

• Try to initialize network first, and only then initialize ili9341 (and see if now you get memory allocation error from ili9341)
• Reduce the RAM needed for networking (I’m not sure about the details, probably some LWIP configuration macros)
• Reduce the RAM consumed by ili9341 driver buffers: set higher values to factor argument of ili9341 (default is 4, you can try 8 or 16).
• Try your code on ESP32 with SPI RAM such as wrover.
• Reduce the RAM consumed by lvgl itself (@kisvegabor, @embeddedt - could you suggest what to change in lv_conf.h to reduce lvgl RAM alllocated on lv_init() ?)

This may be related:

Not enough DMA-able memory to allocate display buffer

Hi! Hope you are all well. So I have been using lvgl with a m5stack and micropython with great success until now. When I tried to add wifi and a WiFi manager I got the following error: “Not enough DMA-able memory to allocate display buffer”. I would thought that with 520kb ram I would have enough to work with but something is wrong. Anyone have experience with this issue? Thank you!