// SomeUUID is one of the incomplete service UUID list.
func SomeUUID(u ble.UUID) Field {
return func(p *Packet) error {
if u.Len() == 2 {
return p.append(someUUID16, u)
}
if u.Len() == 4 {
return p.append(someUUID32, u)
}
return p.append(someUUID128, u)
}
}
// IBeacon returns an iBeacon advertising packet with specified parameters.
func IBeacon(u ble.UUID, major, minor uint16, pwr int8) Field {
return func(p *Packet) error {
if u.Len() != 16 {
return ErrInvalid
}
md := make([]byte, 23)
md[0] = 0x02 // Data type: iBeacon
md[1] = 0x15 // Data length: 21 bytes
copy(md[2:], ble.Reverse(u)) // Big endian
binary.BigEndian.PutUint16(md[18:], major) // Big endian
binary.BigEndian.PutUint16(md[20:], minor) // Big endian
md[22] = uint8(pwr) // Measured Tx Power
return ManufacturerData(0x004C, md)(p)
}
}