| LoRaWAN Header | LoRaWAN payload | + ---- + --------- + -------------------------------- + | | RuleID=21 | W = 0 | C = 1 | Padding=b'000000 | + ---- + --------- + ----- + ----- + ---------------- + | XXXX | 1 byte | 1 bit | 1 bit | 6 bits |