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--- esib_iot_challenge [2017/05/17 22:35] – [3. Devices] samer
+++ esib_iot_challenge [2017/05/17 22:47] – samer
@@ Line 119: / Line 119: @@
   * What are the possible strengths and weaknesses in terms of security of MQTT?
   * What are the different types of topics used by the backend? Explain.
   * Explain the different fields in a captured MQTT message received from you device.
 </WRAP>
-===== -. The End-to-End Challenge =====
-===== -. The Downlink Challenge =====
+<WRAP left round tip 100%>
+The payload received by the MQTT client is decrypted but encoded in Base64. You should decode it to get the original message.
-===== -. The Radio Challenge =====
+</WRAP>
-<code>
+===== -. The Challenges =====
-//      LMIC_disableChannel(1);
-//      LMIC_disableChannel(2);
-//      LMIC_disableChannel(3);
-//      LMIC_disableChannel(4);
-//      LMIC_disableChannel(5);
-//      LMIC_disableChannel(6);
-//      LMIC_disableChannel(7);
-//      LMIC_disableChannel(8);
-//      LMIC_setDrTxpow(DR_SF10,14);
-</code>
-<code>
+==== -. The End-to-End Challenge ====
-{
+==== -. The Downlink Challenge ====
-          "applicationID": "2",
+==== -. The Radio Challenge ====
-          "applicationName": "NTRE-1617",
+==== -. The Sensor Challenge ====
-          "data": "eyJMIjogMzcwLCAiTSI6IDM2NywgIlQiOiAtMTI3LjAwfQ==",
-          "devEUI": "0ce03fb4fcab65ed",
-          "fCnt": 26,
-          "fPort": 1,
-          "nodeName": "NTRE-G1",
-          "rxInfo": [{
-                    "loRaSNR": 8.8,
-                    "mac": "7276ff000b03008c",
-                    "rssi": -71,
-                    "time": "2017-05-17T17:16:35.973982Z"
-          }],
-          "txInfo": {
-                    "adr": true,
-                    "codeRate": "4/5",
-                    "dataRate": {
-                              "bandwidth": 125,
-                              "modulation": "LORA",
-                              "spreadFactor": 10
-                    },
-                    "frequency": 868100000
-          }
-}
-</code>