Differences

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

--- deploying_lorawan [2017/04/30 12:07] – [1.1. Autonomo with LoRaBee] samer
+++ deploying_lorawan [2017/04/30 16:36] – samer
@@ Line 1: / Line 1: @@
 ====== Deploying an End-to-End LoRaWAN Platform ======
-Starting from September 2016, Saint-Joseph University of Beirut (USJ) will be deploying the first academic [[http://www.semtech.com/wireless-rf/internet-of-things/what_is_lora.html | LoRa]] network in Lebanon. The network will support monitoring of micro-climate conditions in vineyards. Here below you can find a detailed description of the experimental platform implementing an end-to-end LoRaWAN solution.
+Starting from September 2016, Saint-Joseph University of Beirut (USJ) will be deploying the first academic [[http://www.semtech.com/wireless-rf/internet-of-things/what_is_lora.html | LoRa]] network in Lebanon. The network will support monitoring of micro-climate conditions in vineyards. Here below you can find a detailed description of the experimental platform implementing an end-to-end LoRaWAN solution. The platform consists of the following elements:
-[{{ :e2e-lorawan.png?direct&750 | Figure 2. Architecture of the LoRaWAN Platform}}]
+  * Devices that communicate to one or more gateways via a wireless interface using single hop LoRa. These devices implement a
+with a sensing interface and a communication interface implementing the LoRaWAN protocol.
+  * Gateways or base stations that relay the radio frames to the IP backend.
+  * A LoRAWAN backend implementing the network server function.
+  * Application examples that enable to visualize and store the sensor data.
+[{{ :lora-pilot-architecture.png?direct&650 | Figure 2. Architecture of the LoRaWAN Platform}}]
 ===== -. Devices =====
 ==== -. Autonomo with LoRaBee ====
-For the devices in the LoRaWAN platform, we will use an Autonomo board with a LoRaBee holding the Microchip RN2483 module. According to [[http://shop.sodaq.com]], Autonomo is a matchbox-sized powerhouse which uses the new Atmel Cortex M0+ 32bit micro controller. One advantage of such device is that it can be powered by a smartphone-sized solar panel.
+Starting with the devices in the LoRaWAN platform, we will use an [[http://support.sodaq.com/sodaq-one/autonomо/|Autonomo]] board with a LoRaBee Microchip RN2483 module. According to [[http://shop.sodaq.com]], Autonomo is a matchbox-sized powerhouse which uses the new Atmel Cortex M0+ 32bit micro controller. One advantage of such device is that it can be powered by a smartphone-sized solar panel.
 In order to configure the Autonomo with LoRaBee device, you should follow these steps:
@@ Line 18: / Line 23: @@
 Now you are ready to write a sketch for the device. Here is one example sketch {{ :test-lorawan-combined-loraserver-example.zip |}} where the autonomo is connected to three sensors: light, moisture, and temperature. Let us analyse some extracts of the code.
-In this part, you should put the keys for Over-The-Air Activation (OTAA) as explained in the LoRaWAN specification:
+In this part, you should put the keys for Over-The-Air Activation (OTAA) as explained in the {{ :lorawan102-20161012_1398_1.pdf |LoRaWAN specification}}:
 <code c++>
 // USE YOUR OWN KEYS!
@@ Line 36: / Line 41: @@
 int light_pin = A0;
 int moisture_pin = A2;
 int temperature_pin = 0;
 int temperature_vcc_pin = 1;
@@ Line 43: / Line 47: @@
 </code>
-The OTAA method is used for joining the network and adaptive data rate is activated:
+The OTAA method is used for joining the network and Adaptive Data Rate (ADR) is activated:
 <code c++>
 LoRaBee.initOTA(loraSerial, devEUI, appEUI, appKey, true)
@@ Line 60: / Line 64: @@
 </code>
-Finally, the message is sent in an unconfirmed uplink message:
+Finally, the message containing the sensor values is sent in an unconfirmed uplink message:
 <code c++>
 LoRaBee.send(1, (uint8_t*)message.c_str(), message.length())
@@ Line 66: / Line 70: @@
 ==== -. Arduino with Dragino Shield ====
+Devices in the LoRaWAN platform can also be implemented on Arduino boards with Dragino shields. The combined module as well as the basic configuration steps are presented in [[simple_lora_prototype|Simple Prototype of LoRa Communications]]. As for the Autonomo device, you can download the following sketch {{ :test-loraserver-comb-loraserver-dragino.zip |}} and modify it according to your preferences. Below you can find somme commented extracts of the sketch.
+The pin mapping corresponds to the Dragino electronic schematic:
+<code c++>
+const lmic_pinmap lmic_pins = {
+    .nss = 10,
+    .rxtx = LMIC_UNUSED_PIN,
+    .rst = 9,
+    .dio = {2, 6, 7},
+};
+</code>
+The send function is rescheduled TX_INTERVAL seconds after each transmission complete event:
+<code c++>
+        case EV_TXCOMPLETE:
+            Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
+            if(LMIC.dataLen) {
+                // data received in rx slot after tx
+                Serial.print(F("Data Received: "));
+                Serial.write(LMIC.frame+LMIC.dataBeg, LMIC.dataLen);
+                Serial.println();
+            }
+            // Schedule next transmission
+            os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
+            break;
+</code>
+This send function is initially scheduled here:
+<code c++>
+do_send(&sendjob);
+</code>
+The message containing the sensor values is transmitted on one of the radio channels (as in the Autonomo case):
+<code c++>
+LMIC_setTxData2(1, (uint8_t*) buffer, message.length() , 0);
+</code>
+The adaptive data rate is not supported, and the spreading factor is configured as follows:
+<code c++>
+LMIC_setDrTxpow(DR_SF7,14);
+</code>
 ===== -. Gateways =====
 ==== -. Single Channel Gateway ====