tracing the issue, it seems to be related to the reset of the CST816s.

The chip is connected by an IO expander.

Commenting out the "reset" function of esp_lcd_touch_cst816s, and LVGL works fine.

Trying to convert an existing application to use esp_lvgl_port , esp_lcd_st77916 and esp_lcd_touch_cst816s .

As long as the touch device (CST816) is not enabled, LVGL works fine.

However, if the touch device is enabled the screen is cleared and no LVGL widgets are displayed.

The code to enable ...

Thank you! I must have missed than nuance in the documentation.

I tried your code complete, and again for me it's not indicating any data being received (I tried with both "screen" and "idf.py montitor"). The output of the ESP32 is displayed, but data sent to the ESP32 is not received.

That is puzzling.

What ESP32 are you using?

The Waveshare board being used ...

Hello,

Using a variant "waveshare_esp32_s3_touch_amoled_241" I'm not have any success trying to read characters from stdin.

Starting with the "hello_world_main" example from ESP IDF, the following has been added as a task during the countdown:

void reader( void *pvParameters ) {
printf("Reader ...