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Flash ESP32~

Download Firmware~

Go to the releases page on GitHub to download the latest openHASP binaries.

Get the full binary file for your ESP32 device: e.g. d1-mini-esp32_ili9341_full_4MB_v0.6.0.bin


You can also download the nightly openHASP file from the Actions tab on Github.

Flash ESP32~


When flashing openHASP onto the ESP32 for the first time, you need to flash it over serial using the full firmware binary file. You need to write the full binary to the ESP32 flash chip at address 0x0.

The full binary also contains a bootloader and partition scheme needed to properly boot the ESP32.

Before starting the flash process you have to put the ESP into flash mode:

  1. Connect GPIO0 to GND before booting the devide
  2. Power-on or reset the ESP while GPIO0 is connected to GND
  3. Start the flash process

The actual procedure to flash the ESP32 depends on the tool used. Click on the tab below that matches your flash tool.


ESPHome Flasher cannot flash the openHASP binary. Use one of the other tools below instead.

2 --port COM1 erase_flash --port COM1 --baud 921600 write_flash 0x0 d1-mini-esp32_ili9341_full_4MB_<version>.bin

Change COM1 to the correct port on your computer. If you get an error at the end of the flash procedure, you can try with a lower the baudrate eg. 460800.

Tasmota-PyFlasher is a simple GUI tool for flashing ESP32 firmware without any installation.


Change COM7 to the correct port on your computer.

Espressif provides their own Flash Download Tools for Windows.

Flash Download Tools

Change COM90 to the correct port on your computer.

Last update: 2022-06-04
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