Set up your robot's firmware

Choose your robot and what's built into it. Then flash the firmware straight from this page, or download a settings file for the Arduino IDE.

Robot body
Board
How you drive
Parts

Your body's standard parts are on. Turn off what you haven't installed, and turn on what you've added.
Battery

The app's battery gauge goes from empty to full at these voltages.

Serial Monitorat startup

Sets the battery, the parts and phone or no phone mode on a robot that already has this firmware, without flashing.

Connecting your robot by USB

Use a USB data cable. Many cables only charge. If no port shows up, try another cable.
Close other programs that use the port, like the Arduino IDE's Serial Monitor.
Click Flash firmware and choose the board's port. It's called something like COM3 on Windows, cu.usbserial-… or cu.wchusbserial… on a Mac, and ttyUSB0 on Linux.

Your computer may need a driver for the board's USB chip. The chip's name is printed on it, next to the USB socket.

USB chip	Found on	Driver
CH340, CH341	Most Nano clones, many ESP32 boards	Windows · macOS
CP2102, CP2104	Many ESP32 boards	Silicon Labs
FTDI	Original Arduino Nano	FTDI

On Linux no driver is needed, but your user must be allowed to use serial ports: run sudo usermod -aG dialout $USER, then log out and in again.

ESP32: hold the board's BOOT button while flashing starts, and let go once it writes.

Nano: the page tries the new and the old bootloader by itself. If both fail, press the reset button just after clicking Flash firmware.