Search found 4 matches

by dirkxus
Sun Apr 19, 2020 8:13 pm
Forum: ESP32 Arduino
Topic: Signed Firmware for OTA / X.509 / RFC3161
Replies: 0
Views: 2955

Signed Firmware for OTA / X.509 / RFC3161

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 fi...
by dirkxus
Sun Sep 23, 2018 5:05 pm
Forum: ESP-IDF
Topic: ESP32 / RMT loosing ticks /
Replies: 4
Views: 6717

Re: ESP32 / RMT loosing ticks /

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 0,1...
by dirkxus
Fri Sep 21, 2018 6:27 pm
Forum: ESP-IDF
Topic: ESP32 / RMT loosing ticks /
Replies: 4
Views: 6717

Re: ESP32 / RMT loosing ticks /

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 Apache Sof...
by dirkxus
Fri Sep 21, 2018 12:24 pm
Forum: ESP-IDF
Topic: ESP32 / RMT loosing ticks /
Replies: 4
Views: 6717

ESP32 / RMT loosing ticks /

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 is a si...