deploying_lorawan
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deploying_lorawan [2017/04/30 11:59] – samer | deploying_lorawan [2017/04/30 16:22] – [Deploying an End-to-End LoRaWAN Platform] samer | ||
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Starting from September 2016, Saint-Joseph University of Beirut (USJ) will be deploying the first academic [[http:// | Starting from September 2016, Saint-Joseph University of Beirut (USJ) will be deploying the first academic [[http:// | ||
+ | The platform consists of the following elements: | ||
- | [{{ : | + | * Wireless devices implementing |
+ | * Gateway or base station | ||
+ | * LoRAWAN backend | ||
+ | * Application | ||
+ | [{{ : | ||
===== -. Devices ===== | ===== -. Devices ===== | ||
==== -. Autonomo with LoRaBee ==== | ==== -. Autonomo with LoRaBee ==== | ||
- | For the devices in the LoRaWAN platform, we will use an Autonomo board with a LoRaBee | + | Starting with the devices in the LoRaWAN platform, we will use an [[http:// |
In order to configure the Autonomo with LoRaBee device, you should follow these steps: | In order to configure the Autonomo with LoRaBee device, you should follow these steps: | ||
Line 16: | Line 21: | ||
- Add the following library {{ : | - Add the following library {{ : | ||
- | Now you are ready to write a sketch for the device. Here is one example sketch {{ : | + | Now you are ready to write a sketch for the device. Here is one example sketch {{ : |
+ | In this part, you should put the keys for Over-The-Air Activation (OTAA) as explained in the {{ : | ||
<code c++> | <code c++> | ||
// USE YOUR OWN KEYS! | // USE YOUR OWN KEYS! | ||
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const uint8_t appKey[16] = | const uint8_t appKey[16] = | ||
{ }; | { }; | ||
+ | </ | ||
+ | |||
+ | The pins for connecting the sensors are specified in these declarations (A0 for light sensor, A2 for moisture sensor, and D0 temperature sensor): | ||
+ | <code c++> | ||
+ | int light_pin = A0; | ||
+ | int moisture_pin = A2; | ||
+ | int temperature_pin = 0; | ||
+ | int temperature_vcc_pin = 1; | ||
+ | int moisture_vcc_pin = 8; | ||
+ | int moisture_gnd_pin = 7; | ||
</ | </ | ||
- | a light sensor on pin A0, A2 (moisture sensor), | + | The OTAA method is used for joining the network |
- | * OTA join method | + | <code c++> |
- | * Frequency channels | + | LoRaBee.initOTA(loraSerial, |
- | * Message sending | + | </ |
+ | Eight different sub channels are activated with data rate ranges from 0 to 5: | ||
+ | <code c++> | ||
+ | LoRaBee.configChFreq(0, | ||
+ | LoRaBee.configChFreq(1, | ||
+ | LoRaBee.configChFreq(2, | ||
+ | LoRaBee.configChFreq(3, | ||
+ | LoRaBee.configChFreq(4, | ||
+ | LoRaBee.configChFreq(5, | ||
+ | LoRaBee.configChFreq(6, | ||
+ | LoRaBee.configChFreq(7, | ||
+ | </ | ||
+ | Finally, the message containing the sensor values is sent in an unconfirmed uplink message: | ||
+ | <code c++> | ||
+ | LoRaBee.send(1, | ||
+ | </ | ||
==== -. Arduino with Dragino Shield ==== | ==== -. 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 {{ : | ||
+ | |||
+ | 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}, | ||
+ | }; | ||
+ | </ | ||
+ | |||
+ | The send function is rescheduled TX_INTERVAL seconds after each transmission complete event: | ||
+ | <code c++> | ||
+ | case EV_TXCOMPLETE: | ||
+ | Serial.println(F(" | ||
+ | if(LMIC.dataLen) { | ||
+ | // data received in rx slot after tx | ||
+ | Serial.print(F(" | ||
+ | Serial.write(LMIC.frame+LMIC.dataBeg, | ||
+ | Serial.println(); | ||
+ | } | ||
+ | // Schedule next transmission | ||
+ | os_setTimedCallback(& | ||
+ | break; | ||
+ | </ | ||
+ | |||
+ | This send function is initially scheduled here: | ||
+ | <code c++> | ||
+ | do_send(& | ||
+ | </ | ||
+ | |||
+ | The message containing the sensor values is transmitted on one of the radio channels (as in the Autonomo case): | ||
+ | <code c++> | ||
+ | LMIC_setTxData2(1, | ||
+ | </ | ||
+ | |||
+ | The adaptive data rate is not supported, and the spreading factor is configured as follows: | ||
+ | <code c++> | ||
+ | LMIC_setDrTxpow(DR_SF7, | ||
+ | </ | ||
===== -. Gateways ===== | ===== -. Gateways ===== | ||
==== -. Single Channel Gateway ==== | ==== -. Single Channel Gateway ==== |
deploying_lorawan.txt · Last modified: 2021/08/28 09:50 by samer