I'm using a small sample application to figure out how I can have two network interfaces active : wifi when all is well, but fallback to cell phone otherwise. The demo app works with one network interface (either) but not when both are started. Even the initial communication (a simple web query) fai...

Found solutions to my problems, see https://sourceforge.net/p/esp32s3-4827s ... k/minimal/

I have one of these Sunton boards esp32s4827s043 with an esp32s3, a 480x272 display, and capacitive touch (they say). I was able to get the display to work from a barebones esp-idf program, but not the (gt911?) touch.
See https://sourceforge.net/p/esp32s3-4827s043/code/ .

Any clues on how to debug ?

I purchased one of the several new types of board recently. Mine is a esp32-4827s043. Hoping this image will come through : https://ae01.alicdn.com/kf/S4e98bc43a9404020be2c8b76d2a3e403l/ESP32-S3-HMI-8M-PSRAM-16M-Flash-Arduino-LVGL-WIFI-Bluetooth-4-3-480-270-Smart.jpg_Q90.jpg_.webp Has anyone been ab...

Well, the select() API was built for three things, one of them being exceptional conditions. And the other side in the communication (trying to read) does get such a signal. Three independent sets of file descriptors are watched. The file descriptors listed in readfds will be watched to see if chara...

Hey, I have pretty standard code based on BSD socket select. Shouldn't select() catch the condition that a socket is disconnected and can't be written to ? Error message changes after the first error, then keeps on going instead of getting an error condition raised. https://sourceforge.net/p/espalar...

Done, https://github.com/espressif/esp-idf/issues/7157

Over three weeks and not a single reply :-( The same bug is present in esp-idf-4.2.1 . Here's a diff for esp-idf-v4.2.1/components/esp_http_client/esp_http_client.c : hp: {16} diff esp_http_client.c.orig esp_http_client.c 1005a1006,1012 > int _header_end(const char *ptr, const int len) { > for (int ...

I'm a bit late with this reply but check out my acme client.
https://sourceforge.net/projects/esp32-acme-client/

Hey, esp_http_client_fetch_headers has a bug. It calls http_parser_execute with incomplete headers, and when it does that, the latter will call the on_header_value functions with erroneous data. To make this concrete : - I'm requesting stuff from the letsencrypt.org - on some requests, the set of he...