lbernstone

This is due to how delay is calculated. The minimum delay is a multiple of the FreeRTOS tick frequency (1000 Hz). https://github.com/espressif/arduino-esp32/issues/2981

> "Esp now. h" in idf is supported, and it is also explained in the Arduino for esp32 document, but it cannot be compiled. The header file is not included,...

Just to clarify about the behavior: When you run this on the esp32, it all seems to work just fine, but if you take that SD card and put it...

I am on vacation, so I don't have a sd card handy

Have you tested with the [development version 1.0.5](https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md)?

In 3.0 there is also an entry specifically for ESP32-S3-WROOM-2.

https://github.com/lbernstone/arduino-esp32-solo

What is the error? If it is from esptool, you may be able to just update the tool.

There are automated platform releases by the tasmota team for platformio. https://github.com/Jason2866/esp32-arduino-lib-builder/releases/. Look through the assets for the latest solo build and use that as the platform= in your env.

It's not mine, any more. Thanks to @Jason2866