| LoRaWAN Header | LoRaWAN payload (49 bytes) | + --------------------------- + ------------------------------------- + | | FOpts | RuleID=21 | W = 1 | FCN = 0 | 1 tile | + ---- + ------- + ---------- + ----- + ------- + ------------------- + | XXXX | 2 bytes | 1 byte | 1 bit | 1 bit | 48 bytes and 6 bits |