Differences

This shows you the differences between two versions of the page.

--- lora_radio_coverage [2016/10/15 21:48] – [5. Lessons and Future Works] samer
+++ lora_radio_coverage [2016/10/27 09:26] – [2. Software Platform] samer
@@ Line 20: / Line 20: @@
 ===== -. Software Platform =====
-For basic hands-on with the prototype devices, you can refer to the article [[simple_lora_prototype|Simple Prototype of LoRa Communications]]. Start by downloading the {{ :rf95_client_server.zip |sketches}} that implement a reliable LoRa communication between the two modules: the client corresponds to the mobile device, the server to the base station. Open the sketches with Arduino IDE, compile and upload on the two arduino modules, respectively. The client will periodically send a hello message to the server and wait for an acknowledgement. Communication uses a spreading factor of 7 and a transmit power of 13 dBm. These parameters can be tuned as mentioned in the previous [[simple_lora_prototype|tutorial]].
+For basic hands-on with the prototype devices, you can refer to the article [[simple_lora_prototype|Simple Prototype of LoRa Communications]]. Start by downloading the {{ :rf95_client_server.zip |sketches}} that implement a reliable LoRa communication between the two modules: the client corresponds to the mobile device, the server to the base station. Open the sketches with Arduino IDE, compile and upload to the two arduino modules, respectively. The client will periodically send a hello message to the server and wait for an acknowledgement. Communication uses a spreading factor of 7 and a transmit power of 13 dBm. These parameters can be tuned as mentioned in the previous [[simple_lora_prototype|tutorial]].
 ==== -. Base station ====
@@ Line 92: / Line 92: @@
 This basic coverage test shows the exciting performance of the LoRa technology:
   * We successfully covered large parts of the campus with a very small transmission device placed indoors. Can you imagine the same with WiFi/Bluetooth/Zigbee?
-  * The mobile device is powered by a smartphone. We can expect small LoRa end-devices to work on a battery for years. Can you imagine the same with GPRS, 3G, or 4G technologies?
+  * The mobile device is powered by a smartphone. We expect small LoRa end-devices to work on a battery for years. Can you imagine the same with GPRS, 3G, or 4G devices?
-  * The test is performed with a spreading factor of 7, we would expect more robust communication (thus, larger coverage) with higher spreading factors.
+  * The test is performed with a spreading factor of 7, we expect more robust communication (thus, larger coverage) when using higher spreading factors.
-  * The indoor base station has a omnidirectional antenna with 3dBi gain, we would expect larger coverage with directional rooftop antennas.
+  * The indoor base station has an omnidirectional antenna with 3dBi gain, we expect larger coverage with directional rooftop antennas.
 The first academic LoRa network deployed by USJ will be an excellent trial field to get more insights on the performance of this very promising technology. The future tests will enable to study the properties of the radio channel in the 868 MHz bandwidth, with a special focus on the vineyard agricultural environment.