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--- esib_iot_challenge [2017/05/18 00:05] – [5.1. The End-to-End Challenge] samer
+++ esib_iot_challenge [2017/05/18 00:18] – [4. Applications] samer
@@ Line 130: / Line 130: @@
 </WRAP>
+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 =====