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--- esib_iot_challenge [2017/05/17 22:45] – [7. The Radio Challenge] samer
+++ esib_iot_challenge [2017/05/18 09:52] – [5.3. The Radio Challenge] 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 126: / Line 130: @@
 </WRAP>
-===== -. The End-to-End 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>
+{
+    "reference": "abcd1234",                  // reference which will be used on ack or error (this can be a random string)
+    "confirmed": false,                        // whether the payload must be sent as confirmed data down or not
+    "fPort": 10,                              // FPort to use (must be > 0)
+    "data": "...."                            // base64 encoded data (plaintext, will be encrypted by LoRa Server)
+}
+</code>
+===== -. The 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 Downlink Challenge =====
+==== -. The Radio Challenge ====
+I can tune the LoRa radio parameters and assess the results.
-===== -. The Radio Challenge =====
+These two commands can be helpful:
+<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.