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--- exploring_lora [2018/09/29 12:51] – [3.1. Modifying the Radio Parameters] samer
+++ exploring_lora [2018/09/29 12:59] – [3.1. Modifying the Radio Parameters] samer
@@ Line 67: / Line 67: @@
 ==== -. Modifying the Radio Parameters ====
-Download the {{ :sketch-1819.zip | basic sketches}} that implement a simple LoRa communication between the two modules: a client module and a server module. Open the sketches with Arduino IDE. Make sure to choose the correct ''Board'' and ''Port'' in the ''Tools'' menu. In order to reduce collisions, configure the central frequency of your LoRa modules as below:
+Download the {{ :sketch-1819.zip | basic sketches}} that implement a simple LoRa communication between the two modules: a client module and a server module. Open the sketches with Arduino IDE. Make sure to choose the correct ''Board'' and ''Port'' in the ''Tools'' menu.
+Take a look at the source code in ''rf95_client.ino'' and ''rf95_server.ino''. Particularly, the ''setup'' function configures the radio parameters of your LoRa devices:
+  * Central frequency (freq)
+  * Spreading Factor (SF)
+  * Bandwidth (Bw)
+  * Coding Rate (CR)
+  * Transmit power (Pow)
+<code c++>
+rf95.setFrequency(frequency);
+// Setup Power,dBm
+rf95.setTxPower(13);
+// Setup Spreading Factor (6 ~ 12)
+rf95.setSpreadingFactor(7);
+// Setup BandWidth, option: 7800,10400,15600,20800,31250,41700,62500,125000,250000,500000
+//Lower BandWidth for longer distance.
+rf95.setSignalBandwidth(125000);
+// Setup Coding Rate:5(4/5),6(4/6),7(4/7),8(4/8)
+rf95.setCodingRate4(5);
+</code>
+In order to reduce collisions, configure the central frequency of your LoRa modules as indicated below:
 ^  Group Number  ^   Frequency     ^
@@ Line 83: / Line 109: @@
 |       12       |      868.9      |
-Note that the radio parameters of your LoRa devices: Spreading Factor (SF), Bandwidth (Bw), and Coding Rate (CR) are configured in the ''setup'' function of the sketches. when needed, you can modify these configurations.
 ==== -. Running Basic Sketches ====