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--- esib_iot_challenge [2017/05/17 22:27] – [4. Applications] samer
+++ esib_iot_challenge [2017/05/22 18:19] – [6.1. The Wind Rises] samer
@@ Line 96: / Line 96: @@
 Now you are ready to compile the sketch and upload it to the LoRaWAN device. Connect the device a USB port on your PC, choose the board type as ''Arduino/Genuino Mega 2560'' and select the corresponding port. Compile and upload!
+<WRAP left round tip 100%>
+For Arduino Mega 2560, additional drivers can be installed on Windows from http://wch.cn/download/CH341SER_ZIP.html.
+</WRAP>
 Open the serial monitor in the Arduino IDE at 115200 baud and analyse the debug messages.
@@ Line 102: / Line 106: @@
   * What is the radio transmit parameters of the captured debug messages?
   * What is the radio receive parameters of the captured debug messages for the two receive windows?
+</WRAP>
+Getting back to the backend, you can monitor some important information related to your device. Click on the corresponding node session.
+<WRAP left round help 100%>
+  * What are the different fields that appear in the node session corresponding to you device?
+  * Explain how each field is created according to the LoRaWAN specification.
+  * What are the different counters visible at the backend? Explain how they get incremented and how they are used.
 </WRAP>
 ===== -. Applications =====
@@ Line 111: / Line 123: @@
   * 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.
+</WRAP>
-===== -. The Radio Challenge =====
+If you need to send data to your device, you should publish the encoded message in the corresponding topic ''application/APPLICATION_ID/node/DEVICE_EUI/tx'' as follows:
-<code>
-//      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>
 {
-          "applicationID": "2",
+    "reference": "abcd1234",                  // reference which will be used on ack or error (this can be a random string)
-          "applicationName": "NTRE-1617",
+    "confirmed": false,                        // whether the payload must be sent as confirmed data down or not
-          "data": "eyJMIjogMzcwLCAiTSI6IDM2NywgIlQiOiAtMTI3LjAwfQ==",
+    "fPort": 10,                              // FPort to use (must be > 0)
-          "devEUI": "0ce03fb4fcab65ed",
+    "data": "...."                            // base64 encoded data (plaintext, will be encrypted by LoRa Server)
-          "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>
+===== -. Day One Challenges =====
+==== -. The End-to-End Challenge ====
+I can send data from the device to the application.
+==== -. The Downlink Challenge ====
+I can send data from the application to the device.
+==== -. The Radio Challenge ====
+I can tune the LoRa radio parameters and assess the results.
+These two commands can be helpful when used after the join event:
+<code c++>
+LMIC_disableChannel(N);
+LMIC_setDrTxpow(DR_SF12,14);
+</code>
+==== -. The Sensor Challenge ====
+I can use different sensors to send data from the device: PIR, moisture, temperature, light, etc.
+===== -. Day Two Challenges =====
+==== -. The Wind Rises ====
+This is a mandatory challenge. It consists of using [[https://nodered.org|Node-RED]] to receive data from the sensors (via MQTT) and send it to [[https://emoncms.org|emoncms]]. The dashboard facility on emoncms is used to visualize the sensor data.
+^ Provided material ^
+| VM with Node-RED installed |
+| Node-RED example flow |
+^ Required skills ^
+| Basic javascript |
+| GUI configuration |
+| Two drops of IoT imagination |
+=== Provided material ===
+  * VM with Node-RED installed
+  * Node-RED example flow
+=== Required skills ===
+  * Basic javascript
+  * GUI configuration
+  * Two drops of IoT imagination
+==== -. Nausicaa Challenge ====
+==== -. Totoro Challenge ====
+==== -. Kiki Challenge ====
+==== -. Mononoke Challenge ====