--appSKey VAL    : Sets the application session key
 --devAddr VAL    : Sets the device address
 --devEUI VAL     : Sets the device unique identifier (default: 0001020304050607)
 --fCnt N         : Sets the first fCnt (default: 0)
 --gatewayEUI VAL : Sets the gateway unique identifier (default: 0001020304050607)
 --hex VAL        : Set the hex payload (default: )
 --nwkSKey VAL    : Sets the network session key
 --plain VAL      : Set the plain payload (default: )
 --routerHost VAL : Sets the router host (default: router.eu.thethings.network)
 --routerPort N   : Sets the router port (default: 1700)
 -n N             : Number of messages to send (default: 1)