| LoRaWAN Header             | LoRaWAN payload     |
+ -------------- + --------- + ------------------- +
|                | RuleID=20 |   W   | C | Padding |
+ -------------- + --------- + ----- + - + ------- +
|       XXXX     | 1 byte    | 0   0 | 1 | 5 bits  |