diff --git a/LoRaEthernet/LoRaEthernet.ino b/gateway/gateway.ino
similarity index 91%
rename from LoRaEthernet/LoRaEthernet.ino
rename to gateway/gateway.ino
index fd26064..d9ede36 100644
--- a/LoRaEthernet/LoRaEthernet.ino
+++ b/gateway/gateway.ino
@@ -16,6 +16,17 @@ byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};          // set the mac addre
 
 EthernetServer server(80);                                  // initialize the EthernetServer library, using port 80 (default fot HTTP)
 
+struct message {                                            // frame structure
+  uint16_t ID;                                              // ID
+  uint16_t TS;                                              // TimeStamp
+  uint16_t DT;                                              // Data Type
+  uint16_t D1;                                              // DATA 1
+  uint16_t D2;                                              // DATA 2
+  uint16_t D3;                                              // DATA 3
+};
+
+
+
 void setup(){
   Serial.begin(9600);
   while (!Serial);                                          // wait for serial to initialize