HttpClient hardlocks on GET-Request

[PascalMeusel]

Hi,

I am using the HttpClient library and I have an issue, where whenever i call the GET function my controller completly stops working. It does not actually crash, but rather it seems like it is locked. I am not able to reach the controller at that point or get any serial communication. The only way to get it back to working is to actually reset the controller.
I am using a Arduino Pico with a W5500 ethernet board, through which it is connected to the internet.

  HTTPClient http;
  if(http.begin(firmwareUpdateAddress))
  {
      Serial.println("begin worked");
  }
  int httpCode = http.GET();

This is the relevant code snippet. After this point no more code is executed. Is there a problem with using the HttpClient library using Ethernet?
I also tried to make an effort to understand where in the library the lock occurs and where i ende up was, that once the following line is executed the controller is in a lock:
tcp_pcb* pcb = tcp_new();
It is hard for me to say, whether the problem lies here, but this is where i ended up. If i am correct in my assesment, is this issue related to https://github.com/earlephilhower/arduino-pico/issues/775? Does this issue occur since the lwip_w5500 library is not ported yet?
If you need any additional information please let me know. Thank you

[maxgerhardt]

The HTTPClient library in this core only uses the WiFiClient object that goes through LWIP and ends up in the CYW... wifi chip driver. Thus works only on a Pico W. So yes it's exactly that issue #775.

If you want this to work right now, you'd either need to work directly with the EthernetClient class provided by Ethernet.h (example), or clone + modify the HTTPClient library to use a EthernetClient instead of a WiFiClient at its base.

If you are using HTTPS, you further need an EthernetClientSecure thing.