Hi Singe12, You're correct that max supported SPI flash clock is 80MHz. Most common SPI NOR flash should be supported, although there isn't a standard (to my knowledge) there is a set of commands that most manufacturers have supported. Via the settings encoded in the bootloader (chosen in esp-idf me...

Thanks Kanflo for posting a great summary. :) Re: "performance tradeoffs", the tradeoff from routing a signal via the GPIO Matrix is a small amount of latency (2 clock cycles of the peripheral APB clock, at the default 80MHz clock this is 25 nanoseconds) and a lower maximum signal speed of 40MHz. Th...

Hi Singe12, If you pull MTDI high on reset then the internal VDD_SDIO regulator will start up at 1.8V not 3.3V. The value of the pin is read before this power domain's regulator is enabled, and before any user code can be executed (as the user code is loaded from flash). If you pull the pin down (or...

The fix for this bug was merged into esp-idf yesterday, since revision f988dc9.

Thanks everyone for the help diagnosing the issue and testing the fix.

entry to explicitly name the the components I wish to include (the default would otherwise be all that could be found). However when I try this (for example setting COMPONENTS=nvs_flash), I find that the compilation of my app template now fails: This is possible, but it's a bit sub-optimal right no...

Unfortunately, the fixes reported by hydrabus & rudi rely on a silicon bug (the chip resets twice following a power on reset) which has been fixed in the forthcoming next silicon revision of the ESP32. Also, the timing of the two signals (and the IO0 "glitch") appears to be a Windows driver level be...

Hi Ritesh, The esp-idf repository README and docs directory contains guides for getting up and running with esp-idf: https://github.com/espressif/esp-idf#using-espressif-iot-development-framework-with-the-esp32 The examples directory contains some basic examples that you can copy and use as a basis ...

Is there any difference between the WROOM32 and ESP3212 mechanical design and pinout? They appear to be very similar. ESP3212 has a different pinout, however Ai-Thinker is now also making the ESP32S. When I asked Ai-Thinker they told me the ESP32S is the same as the Espressif ESP-WROOM32. Sprite ma...

Thanks for updating Kevin. The 74880 on esp8266 is an artifact of the crystal speed (if you use a 40MHz crystal the baud rate is 115200, but everyone uses 26MHz crystals so it's proportionally lower.) On ESP32 the default baud rate is 115200 regardless of crystal clock rate.

So if the RTOS_SDK is not working for my board, then can I get some information about the ADC? Like - register description, because I can see the registers in the ADC header file but I find no documentation. Maybe it's still under development? That's correct. Technical reference documentation & sam...