#include <ArduinoJson.h>
#include <SPI.h>
#include <LoRa.h>
#include "DHT.h"

#define DHTPIN 3
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

int lightPin = A0;
int counter = 0;
int LEDPin = 4;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  Serial.println("LoRa Sender");

  if (!LoRa.begin(866E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  dht.begin();
  LoRa.crc();
  LoRa.setSyncWord(0x22);
  // register the receive callback
  LoRa.onReceive(onReceive);

  // put the radio into receive mode
  LoRa.receive();
  //  attachInterrupt(digitalPinToInterrupt(2), lora, HIGH);
  pinMode(LEDPin, OUTPUT);
}

void loop() {

  StaticJsonBuffer<200> jsonBuf;

  JsonObject& json = jsonBuf.createObject();

  Serial.print("Sending packet: ");
  Serial.println(counter);

  float h = dht.readHumidity();
  float t = dht.readTemperature();

  json["count"] = counter;
  json["temperature"] = t;
  json["humidity"] = h;
  json["light"] = analogRead(lightPin);

  // send packet
  LoRa.beginPacket();
  json.printTo(LoRa);
  LoRa.endPacket();

  counter++;
  LoRa.onReceive(onReceive);
  LoRa.receive();

  delay(1000);
}

void lora() {
  Serial.println("Get Pin High");
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    // received a packet
    Serial.print("Received packet '");

    // read packet
    while (LoRa.available()) {
      Serial.print((char)LoRa.read());
    }

    // print RSSI of packet
    Serial.print("' with RSSI ");
    Serial.println(LoRa.packetRssi());
  }
}

void onReceive(int packetSize) {
  // received a packet
  Serial.print("Received packet '");
  uint8_t d[packetSize];
  // read packet
  for (int i = 0; i < packetSize; i++) {
    //    Serial.print((char)LoRa.read());
    d[i] = LoRa.read();
    Serial.print(d[i], HEX);
    Serial.print(" ");
  }

  // print RSSI of packet
  Serial.print("' with RSSI ");
  Serial.println(LoRa.packetRssi());

  if (int(d[packetSize - 1]) % 2 == 0) {
    Serial.println("LED on");
    digitalWrite(LEDPin, HIGH);
  } else {
    Serial.println("LED off");
    digitalWrite(LEDPin, LOW);
  }
}