To flash, you need to enter into the bootloader. Here is the wiki on that https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection . I recently wrote a GUI to connect and flash ESP32. https://github.com/sunbearc22/ESP32FlashWriter . I have tested it on Linux (Ubuntu 16.04) and Windows 10 ...

Can someone explain the attached circuitry to me? It is extracted from DOIT ESP32 DevKitV1 circuitry https://www.dropbox.com/s/jefwxxtufgwg0ex/esp32_Schematic%20Prints.pdf?dl=0. After switching on this device, I know that both RTS and DTR are high, and this will lead to EN=GPIO0=3.3V to be true. Whe...

I discovered the issue. The Windows system that I used did not have the driver for the CP2102 USB to UART Bridge Controller. The driver file can be downloaded from https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers and installed by first unzipping the downloade...

After plugging a ESP32 devkitv1 to a Windows system, I discovered that Windows Device Manager categorised the ESP32 as "Other devices" and labelled it as CP2102 USB to UART Bridge Controller. is this normal? Why isn't it catergorised as USB device? Also, pyserial could not detect the eps32 device, i...

What does https://github.com/espressif/esptool/blob/master/esptool.py#L477 in .read_reg() method in esptool.py really mean? raise FatalError.WithResult("Failed to read register address %08x" % addr, data) In the context of class ESP32ROM(ESPLoader).get_chip_description(), the above FatalError is tri...

I came across this. https://github.com/playelek/pinout-doit-32devkitv1

Examples from esptool.py github https://github.com/espressif/esptool esptool.py -p PORT -b 460800 read_flash 0 0x200000 flash_contents.bin esptool.py --port COM4 write_flash 0x00000 my_app.elf-0x00000.bin 0x40000 my_app.elf-0x40000.bin The first will read 2MB from the flash from it's origin 0 byte a...

Great. May I know what offset should I use to write_flash? Example, what offset should I use so that I do not overwrite existing data? Does "write_flash" function auto-detect the next available offset to start writing? Is there a function I should run before write_flash so that I can see the next av...

Can esptool.py be used to copy a text file to/from the flash?

I found the command "write_flash" but that is used to write a binary blob to flash.