Pick a release and your board, then click Connect & flash. A board already running our firmware is rebooted into its bootloader automatically (no button presses). Brand-new boards ship in their bootloader already — tick the box below.
After flashing, connect to the running application port (not the bootloader) to read status, edit config, and calibrate the battery.
Measure the actual battery (or USB rail) voltage with a multimeter, enter it below, click Calibrate. The firmware computes a fresh multiplier from the raw ADC reading and stages it. Commit to persist.