diff --git a/main.go b/main.go
index 313fda0..d9afd47 100644
--- a/main.go
+++ b/main.go
@@ -94,8 +94,10 @@ func main() {
 	var lastReceivedSeq uint8
 	var receivedSeq bool
 	var lastPingAt time.Time
+	var lastLongPingAt time.Time
 	var errCount int
 	var randID [4]byte
+	var authID [6]byte
 	for {
 		r, err := read()
 		if err != nil {
@@ -107,10 +109,23 @@ func main() {
 		}
 		errCount = 0
 
+		// Example success auth packet: 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
+		//                              0xe6, 0xb2, 0x7b, 0x7b, 0xbb, 0x41, 0x3f, 0x2b,
+		//                              0x00, 0x00, 0x00, 0x50, 0x02, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x46, 0x54, 0x54, 0x48, 0x00, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 		if len(r) == 96 && bytes.Equal(r[:8], []byte{0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00}) {
 			if bytes.Equal(r[48:52], []byte{0xff, 0xff, 0xff, 0xfe}) {
 				log.Fatal("invalid user/password")
 			} else {
+				copy(authID[:], r[26:32])
 				log.Print("auth ok")
 			}
 		}
@@ -130,10 +145,10 @@ func main() {
 		}
 		if len(r) == 16 && bytes.Equal(r[:6], []byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00}) {
 			// Replying to the radio.
-			// Example receive: 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xe4, 0x35, 0xdd, 0x72, 0xbe, 0xd9, 0xf2, 0x63
-			// Example answer:  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xbe, 0xd9, 0xf2, 0x63, 0xe4, 0x35, 0xdd, 0x72
+			// Example request from radio: 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xe4, 0x35, 0xdd, 0x72, 0xbe, 0xd9, 0xf2, 0x63
+			// Example answer from PC:     0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xbe, 0xd9, 0xf2, 0x63, 0xe4, 0x35, 0xdd, 0x72
 			gotSeq := r[6]
-			send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, gotSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID)})
+			send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, gotSeq, r[7], byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID)})
 		}
 
 		if time.Since(lastPingAt) >= 100*time.Millisecond {
@@ -145,8 +160,37 @@ func main() {
 			}
 			send([]byte{0x15, 0x00, 0x00, 0x00, 0x07, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x01,
 				randID[0], randID[1], randID[2], randID[3]})
+			send([]byte{0x10, 0x00, 0x00, 0x00, 0x03, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID)})
 			sendSeq++
 			lastPingAt = time.Now()
+
+			if time.Since(lastLongPingAt) >= 60*time.Second {
+				// Example request from PC:  0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x00,
+				//                           0xbb, 0x41, 0x3f, 0x2b, 0xe6, 0xb2, 0x7b, 0x7b,
+				//                           0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, 0x02,
+				//                           0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+				// Example reply from radio: 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00,
+				//                           0xe6, 0xb2, 0x7b, 0x7b, 0xbb, 0x41, 0x3f, 0x2b,
+				//                           0x00, 0x00, 0x00, 0x30, 0x02, 0x05, 0x00, 0x02,
+				//                           0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+				send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID),
+					0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, 0x3f,
+					0x00, 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+				sendSeq++
+				lastLongPingAt = time.Now()
+			}
 		}
 	}
 }