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--- esib_iot_challenge [2017/05/17 18:31] – [3. Devices] samer
+++ esib_iot_challenge [2017/05/17 18:50] – [3. Devices] samer
@@ Line 86: / Line 86: @@
   * When is the EV_TXCOMPLETE event called?
 </WRAP>
+Finally let us look at the message sending on the device.
+<WRAP left round help 100%>
+  * What is the function for sending messages on the device? How it is called?
+  * What is the period of message sending? Explain the implementation choice.
+  * Is this period guaranteed according to the LoRaWAN specification?
+</WRAP>
+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!
+Open the serial monitor in the Arduino IDE at 115200 baud and analyse the debug messages.
 ===== -. Applications =====
 mqtt-spy is an open source utility intended to help you with monitoring activity on MQTT topics. It has been designed to deal with high volumes of messages, as well as occasional publications. mqtt-spy is a JavaFX application, so it should work on any operating system with an appropriate version of Java 8 installed. A very useful tutorial is available on [[https://github.com/eclipse/paho.mqtt-spy/wiki]].
 You can use mqtt-spy to debug the messages received from the LoRaWAN devices. For this, you should download the software tool from [[https://github.com/eclipse/paho.mqtt-spy/wiki]]. After starting the application, configure a new connection to the MQTT broker by simply adding the IP address of the broker in the ''Server URI'' field. Now you can subscribe to any MQTT topic. If you want to receive all messages arriving at the backend, you can use the generic topic ''#''. You can also limit to the topic including the messages of any specific device: ''application/APPLICATION_ID/node/DEVICE_EUI/rx''.