Testing VirKO board

Programming firmware

Nice greetings to Nicko from Barcelona, Catalonia.

Connecting programmer

Red board: FT232RL FTDI USB to TTL Serial Adapter Module used as a programmer

It is very important to check jumper socket is at 3.3 volts position (by default it is at 5 volts)

Programming firmware from terminal

Preparing uploading

Follow these steps on VirKO board:

• 1st: Connect 5V microusb power supply

• 2nd: Hold reset (red) button

• 3rd: While holding reset button, hold IO0 button (close to J1 black connector). At this step boths buttons are being pressed.

• 4th: Release reset (red) button

• 5th: Release IO0 button

After these steps, board is ready to be programmed.

Programming from terminal

Software tool: esptool.py

Firmware binary: miniVirKO_03_test.ino.esp32.bin

Terminal command:

esptool.py --port /dev/ttyUSB0 write_flash -fm dio 0x00000 miniVirKO_03_test.ino.esp32.bin

/dev/ttyUSB0 in Windows operating system is COMx port (being x programmer port number. For instance: COM3)

Programming from Windows tool

Flash Download Tools (Explanation about Flash Download Tools use)