Imports in module “periph.io/x/periph” periph.io/x/periph/experimental/devices/mfrc522/commands periph.io/x/periph/conn/gpio/gpioreg periph.io/x/periph/experimental/devices/mfrc522 periph.io/x/periph/conn/spi/spireg periph.io/x/periph/host Standard library imports errors flag fmt os strconv strings