With Chrome or Edge you can flash the ESP32 directly from within the browser window using the openHASP Web installer. If you have another browser then use the offline flash tools below to download and flash the ESP32.
- Get the full binary file for flashing over the serial port:
- Get the ota binary file for updating the firmware from the Web UI:
You can also download the nightly openHASP development .zip files from the Actions tab on Github.
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
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:
GNDbefore booting the devide
- Power-on or reset the ESP while
GPIO0is connected to
- 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.
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.
COM7 to the correct port on your computer.
Espressif provides their own Flash Download Tools for Windows.
COM90 to the correct port on your computer.