examples: add SEND/RECV to lora at-cmd for LoRa P2P/P2MP (not LoRaWAN) testing

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/lora/atcmd/parser.go

@@ -103,6 +103,10 @@ func parseCommand(cmd, args string) error {
 		recv(args)
 	case "RECVHEX":
 		recvhex(args)
+	case "SEND":
+		send(args)
+	case "SENDHEX":
+		sendhex(args)
 	default:
 		return errInvalidCommand
 	}