{ "inherits": ["atsamd21g18a"], "build-tags": ["itsybitsy_m0"], "serial": "usb", "serial-port": ["239a:800f", "239a:8012"], "flash-1200-bps-reset": "true", "flash-method": "msd", "msd-volume-name": "ITSYBOOT", "msd-firmware-name": "firmware.uf2" }