Data Transmission Code

#include <LoRaWan.h>
#include "Air_Quality_Sensor.h"
#include "Arduino.h"
AirQualitySensor sensor(A0);


unsigned char data[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA,};
char buffer[256];
char airbuffer[256];

void setupsensor(void) {
  Serial.println("Set up Sensor Mode...");
  Serial.begin(9600);
  while (!Serial);
    Serial.begin(9600);
    while (!Serial);

    Serial.println("Waiting sensor to init...");
    delay(20000);

  Serial.println("Waiting sensor to init...");
  delay(20000);

  if (sensor.init()) {
    Serial.println("Sensor ready.");
  }
  else {
    Serial.println("Sensor ERROR!");
  }
    if (sensor.init()) {
        Serial.println("Sensor ready.");
    } else {
        Serial.println("Sensor ERROR!");
    }
}


void setup(void)
{
    setupsensor();
    Serial.println("LoRa Connection Mode...");
    SerialUSB.begin(115200);
    while(!SerialUSB);
    
    lora.init();
    
    memset(buffer, 0, 256);
    lora.getVersion(buffer, 256, 1);
    SerialUSB.print(buffer); 
    
    memset(buffer, 0, 256);
    lora.getId(buffer, 256, 1);
    SerialUSB.print(buffer);
    
    lora.setKey("2B7E151628AED2A6ABF7158809CF4F3C", "2B7E151628AED2A6ABF7158809CF4F3C", "2B7E151628AED2A6ABF7158809CF4F3C");
    
    lora.setDeciveMode(LWOTAA);
    lora.setDataRate(DR0, EU868);
    
    lora.setChannel(0, 868.1);
    lora.setChannel(1, 868.3);
    lora.setChannel(2, 868.5);
    
    lora.setReceiceWindowFirst(0, 868.1);
    lora.setReceiceWindowSecond(869.5, DR3);
    
    lora.setDutyCycle(false);
    lora.setJoinDutyCycle(false);
    
    lora.setPower(14);
    
    while(!lora.setOTAAJoin(JOIN));
}

void loop(void)
{   
    bool result = false;

    int quality = sensor.slope();

    Serial.print("Sensor value: ");
    Serial.println(sensor.getValue());

    if (quality == AirQualitySensor::FORCE_SIGNAL) {
       strcpy( airbuffer , "High pollution! Force signal active.");
        Serial.println("High pollution! Force signal active.");
    
    } else if (quality == AirQualitySensor::HIGH_POLLUTION) {
      strcpy(airbuffer , "High pollution!");
        Serial.println("High pollution!");
    } else if (quality == AirQualitySensor::LOW_POLLUTION) {
         strcpy(airbuffer , "Low pollution!");
        Serial.println("Low pollution!");
    } else if (quality == AirQualitySensor::FRESH_AIR) {
         strcpy(airbuffer , "Fresh air.");
        Serial.println("Fresh air.");
    }

  Serial.print("Sensor value: ");
  Serial.println(sensor.getValue());
  

  delay(1000);
    delay(1000);


    result = lora.transferPacket(airbuffer, 10);
    SerialUSB.print(result);
    delay(600000);
    
    
    
    if(result)
    {
        short length;
        short rssi;
        
        memset(buffer, 0, 256);
        length = lora.receivePacket(buffer, 256, &rssi);
        
        if(length)
        {
            SerialUSB.print("Length is: ");
            SerialUSB.println(length);
            SerialUSB.print("RSSI is: ");
            SerialUSB.println(rssi);
            SerialUSB.print("Data is: ");
            for(unsigned char i = 0; i < length; i ++)
            {
                SerialUSB.print("0x");
                SerialUSB.print(buffer[i], HEX);
                SerialUSB.print(" ");
            }
            SerialUSB.println();
        }
    }
}