In the Adruino-ESP32 docs it says to use https://raw.githubusercontent.com/espre ... index.json to develop for ESP32-S3 but there is no S3 based boards with the ESP32-S3 in the board selector. I have a nice ESP32-S3-DevKitC-1-N32R8V Development Board waiting...

I could not get the above to work in Arduino, had to rewrite it after I remembered how. void setup() { Serial.begin(115200); } void loop() { //Serial.printf("ESP32 Chip model = %s Rev %d\n", ESP.getChipModel(), ESP.getChipRevision()); Serial.printf("Total heap: %d\n", ESP.getHeapSize()); Serial.prin...

My bad, I should have posted in the esp8266 forum, the latest NodeMCU from LoLin has sdk 5.2 on it and this is what it does: print(uart.setup(0, 74880, 8, 0, 1, 1 )) ERROR Communication with MCU..Got answer! Communication with MCU established. AutoDetect firmware... Can't autodetect firmware, becaus...

I couldn't find a GPIO list with the pins or GPIO number I could sort so I made one:

More issues: ESP Technical Reference Table 16: GPIO Matrix Peripheral Signals What is "Direct I/O in IO_MUX" mean? I found my answer after a few more hours of reading, the thing that is throwing me is your use of GPIO labels instead of mapping to PIN numbers. I was believing that a PIN could have a ...

While working on the latest SDK I was trying to figure out the garbage on my screen every time I rebooted to discover 74880 baud would allow me to see what was being dumped to the screen. Is there a reason for 74880 instead of a standard baud rates? Some terminal programs do not have 74880 support a...

In Espressif documentation I've noticed that some times they use 0 (Zero) based numbering and other times it is based on 1 (One): SD_* is for the signals of the SDIO slave HS1_* is for the signals of the Port 1 of SDIO host HS2_* is for the signals of the Port 2 of SDIO host MT* is for the signals o...

The Technical Reference Manual section 4 goes over the options for pin muxing in details, but the short answer is "yes you can map most peripherals anywhere". Is there any documentation with example of: UART1 - TX, RX, RTS, CTS pins being assigned to GPIO MUX, DMA setup, Interrupts setup and enable...

SPIRAM: MR25H40MDF 4M as 512KX8 $21.82 qty 1 Earlier I had read we could add external SRAM as IRAM... I don't think so, maybe after it's moved into IRAM but this SPIRAM stuff is painful to work with. It has 1 byte writes, after you set it up and 40 clock cycles later your done. I could see it as a b...

I can't find where to post documentation errors: ESP32 Datasheet 3.1.3 External Flash and SRAM "ESP32 supports 4 X 16 MBytes of external QSPI Flash" this indicates 4 times 16MBytes "ESP32 supports up to 128 Mbits of external DUAL or QUAD SPI Flash memory" The SRAM issue: On the IO_MUX page where is...