Trying to reach a server that needs about 8 seconds to reply, but AT+HTTPCPOST always returns with "SEND FAIL" after 5 seconds already. How to change this timeout with AT+ commands?? We cannot adjust the timing somewhere in a .h file, because it's about units in the field, not in the lab. (when we a...

What hardware and power supply are you using? It could be a power issue, since the power consumption is somewhat spiky, particularly with TLS.

Because there is no function "noise()" declared in noise.h. Therefore, the symbol noise() is unknown. See the available functions in https://github.com/hpwit/fastled-esp32-16PINS/blob/master/noise.h Depending on what you want to achieve, pick one of these functions. This has nothing to do with IDF 4...

See here is our schematic, based on voltage regulator LM3691 and two selector diodes, to choose between USB power or Lithium-Polymer battery. This works fine. If you want, post your schematic for a look and comment.

I solved the issue with the callback functions of the HTTP parser. They read everything and can make it explicit. I described this here:
viewtopic.php?f=13&t=21598
I am, however, not sure if this is possible only with IDF 4.2 and later.

We make custom boards as well, for mass production. I fully agree on ESP_Sprite's contribution above to be the most likely cause. In addition, make sure you have a proper reset cycle at the beginning. We once had spurious side effects, similar to what you describe, when we did not do a proper reset....

I found the answer myself. The HTTP parser works with callback functions at various points, where additional functionality can be insert. ESP-IDF inits these callback functions as follows (see esp_http_client_init()): client->parser_settings->on_message_begin = http_on_message_begin; client->parser_...

For the new AT commands AT+HTTPCLIENT and AT+HTTPCPOST: It seems impossible to get the headers from the server answer? For instance, the client calls a server and gets a cookie (=in the HTTP answer header) in return. How to get the cookie content? It seems impossible.

How did you solve it? I came across the same issue. I need a cookie that is returned from a server, but the standard functions don't hand it over.

HI katebo

Did you ever manage to solve this authentication issue? If yes, how? If no, you might want to give this a try:
viewtopic.php?t=9374

I have to SSL as well; just starting.

Cheers,
Stephan