Imports in module “periph.io/x/periph” periph.io/x/periph/host/sysfs periph.io/x/periph/host/allwinner periph.io/x/periph/conn/gpio/gpioreg periph.io/x/periph/conn/gpio periph.io/x/periph/host/bcm283x Standard library imports errors flag fmt strconv time