There is a setting in menuconfig where you can adjust the filename length.

Did you first try any of the W5500 SPI boards out there first ?
https://www.amazon.com/s?k=w5500+ethern ... ef=sr_pg_1

Not 100% sure what flavor ESP32-S3 you have, but check this link: https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/gpio.html#gpio-summary Further down on that page you will see this. Strapping pin: GPIO0, GPIO3, GPIO45 and GPIO46 are strapping pins. For more in...

Check this out. Its not free, but it covers the things you asked about.
https://learnesp32.com/

I bought it when it was on sale, and there are many great things in there.

You can use something much smaller like this https://www.amazon.com/Regulator-DROK-Converter-Step-Down-Transformer/dp/B096RC71DC/ref=m_crc_dp_lf_d_t1_sccl_2_3/143-5690059-5618842?pd_rd_w=nTPUp&content-id=amzn1.sym.76a0b561-a7b4-41dc-9467-a85a2fa27c1c&pf_rd_p=76a0b561-a7b4-41dc-9467-a85a2fa27c1c&pf_r...

But my real question is, would it be feasible (even advisable) to run the HTTP Client code (Responsible for POSTing out data) on 1 core, and the HTTP Server on another? Would the cores share the WiFi hardware nicely? I realise it's probably way overkill, but I'm in big time learn mode here (New to ...

Did you try moving the set_level before setting it as an output ? Not sure if that will help.

More simple, withOUT 3 #include!

Just curious, what the issue with #include?
You already #include arduino.h, and that one line pulls in a ton of stuff.

Asked chat GPT and here is it's response. #include "esp_system.h" #include "esp_timer.h" #include "esp_log.h" void app_main() { // Initialize the system esp_err_t ret = esp_system_initialize(); if (ret != ESP_OK) { ESP_LOGE("main", "Initialization failed, error = %d", ret); return; } // Get the curr...