Just curious why the "Prerequisites" section says: https://github.com/espressif/vscode-esp-idf-extension#prerequisites Annotation 2020-02-19 142029.jpg The ESP-IDF Tools Installer does all of this automatically, which is far better than installing things one by one. Why not just recommend the Instal...

My guess is that you did not allocate enough for that thread.
try
xTaskCreate(start_HelloWorld, "HelloWorld", 2048, NULL, 5, &taskHandle);

That AC diagram your referring to is to show what the pin with those loads will meet for the timing specifications.
Yes, you can power the MCP23017 from 5V. The only thing you need to do is run your 2 pullup resistors to +3.3v and not +5v

I noticed the same thing. v3.3.1 showed it.

I'll take this up over on that forum. Susan I wish you well there. They are not to helpful with staying on the bleeding edge with ESP. Heck they still have no way to make changes to menuconfig. Without that I don't see why anyone would bother using platformIO for ESP. Its a critical piece to have I...

In the "ESP-IDF V4.0 has been release" post, the document link is bad.
viewtopic.php?f=13&t=14215

Are you using an ESP32 Module of some sort? If so, it already has a USB - Serial interface connected to UART0. So you will not be able to use UART0 RX line unless you cut the RX trace from it to the ESP32 module.

a typical GPIO LOW output is not GROUND. Well..... not technically. But we call it that because a typical low state is 0.2-0.7mv. So other hardware will recognize it as GND or low signal. The ESP32 data sheet states that the max sink current (Low State) is 28ma, and source (High State) is 20ma. Her...

Are you using the SD card with your application ?
IO14 is the HS2_CLK signal for the SD Card socket.

The SPI reading happens in an ISR I would strongly recommend that you do NOT do anything like that in a ISR. SPI, depending on what method you use also uses interrupts. Maybe something along the lines of using xQueueSendFromISR() might be fast enough for you. Not sure... If not then I would set a v...