LoRa - LoRaWAN

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lora.md

LoRa with Arduino on 868.1MHZ#

arduino-LoRa
use 868.1MHZ with SpreadFactor 10

#include <SPI.h>#include <LoRa.h>void setup() {  Serial.begin(9600);  while (!Serial);  Serial.println("LoRa Receiver");  if (!LoRa.begin(868.1E6)) {    Serial.println("Starting LoRa failed!");    while (1);  }  LoRa.setSpreadingFactor(10);}void onReceive(int packetSize) {  Serial.print("packet recv\n");  // read packet  for (int i = 0; i < packetSize; i++) {    Serial.print((char)LoRa.read());  }}void loop() {  LoRa.receive();  LoRa.onReceive(onReceive); }

Bruteforce all the EU frequencies and the SpreadFactor#

#include <SPI.h>#include <LoRa.h>float freq[5] = { 868.3E6, 868.5E6, 867.1E6, 867.5E6, 867.7E6, 867.9E6 }; void setup() {  Serial.begin(9600);  while (!Serial);  Serial.println("LoRa Receiver");  if (!LoRa.begin(868.1E6)) {    Serial.println("Starting LoRa failed!");    while (1);  }  LoRa.setSpreadingFactor(10);}void onReceive(int packetSize) {  Serial.print("packet recv\n");  // read packet  for (int i = 0; i < packetSize; i++) {    Serial.print((char)LoRa.read());  }}void loop() {    LoRa.receive();  LoRa.onReceive(onReceive);  delay(5000);  While(1) {    int i;    for(i=0; i < 5 ; i++)    {            LoRa.setFrequency(freq[i]);      int j;      for(j=7; j <= 12; j++)      {               // loop on spreading factor is finish, set new freq        LoRa.setSpreadingFactor(i);        delay(5000);      }    }  }}

Display RSSI of the packet#

The Received Signal Strength Indication (RSSI) is the received signal power in milliwatts and is measured in dBm.

The RSSI is measured in dBm and is a negative value.
The closer to 0 the better the signal is.

Typical LoRa RSSI values are:

RSSI minimum = -120 dBm.
If RSSI=-30dBm: signal is strong.
If RSSI=-120dBm: signal is weak.

#include <SPI.h>#include <LoRa.h>void setup() {  Serial.begin(9600);  while (!Serial);  Serial.println("LoRa Receiver");  if (!LoRa.begin(867.1E6)) {    Serial.println("Starting LoRa failed!");    while (1);  }     LoRa.setSpreadingFactor(8);}void onReceive(int packetSize) { Serial.print("packet recv\n"); int rssi = LoRa.packetRssi(); Serial.print(rssi);}void loop() {  LoRa.receive();  LoRa.onReceive(onReceive);  delay(1000);}