Imports github.com/gin-gonic/gin github.com/go-ble/ble github.com/go-ble/ble/linux github.com/lestrrat-go/dither github.com/nfnt/resize github.com/pkg/errors github.com/skip2/go-qrcode github.com/tarm/serial Standard library imports bufio bytes context flag image image/jpeg image/png io log net/http os time