As we all know - the Arduino OTA updating process is not very secure - with the key (or an MD5 which you can use as a key) hardcoded in the firmware and on the ESP32.

We needed something a bit better. So not sure how useful this is to folks - but on the principle of share early and often; you can ...

Am strongly suspecting that, when using the RMT system in loop rather than in one-shot mode; it either ignores, or gets confused by the sentinels; and mis-counts during the final ticks in the final block.

If one ensures that all blocks are fully filled with no '0' length blocks (i.e. not use the 0 ...

Updated version - which should make it easier to understand. Still shows glitches though.
/* Simple 'RMT' example which uses a 'double buffering' method
to populate the other buffer once it starts on the second one.

(c) Copyright 2018 Dirk-Willem van Gulik - All rights reserved.
Under the ...

I am having an odd issue with the latest version of IDF (which may well be a regression introduced with 1.0.0).

Every 5 to 100 seconds the RMT output seems to miss a tick/beat or show some other glitch:

http://www.vangulik.org/dirkx/esp32/1.png
http://www.vangulik.org/dirkx/esp32/2.png

Below ...