//Send temperature and humidity data using a DHT11 sensor to the Lora Gateway

#include "TheThingsUno.h"

// Set your DevAddr
const byte devAddr[4] = { <insert DevAddr> };

// Set your NwkSKey and AppSKey
const byte nwkSKey[16] = { <insert NwkSKey> };
const byte appSKey[16] = { <insert AppSKey> };

#define debugSerial Serial
#define loraSerial Serial1

#define debugPrintLn(...) { if (debugSerial) debugSerial.println(__VA_ARGS__); }
#define debugPrint(...) { if (debugSerial) debugSerial.print(__VA_ARGS__); }

TheThingsUno ttu;

int DHpin = 8;
byte dat [4];
byte read_data () {
  byte data;
  for (int i = 0; i < 8; i ++) {
    if (digitalRead (DHpin) == LOW) {
      while (digitalRead (DHpin) == LOW); // wait for 50us
      delayMicroseconds (30); // determine the duration of the high level to determine the data is '0 'or '1'
      if (digitalRead (DHpin) == HIGH)
        data |= (1 << (7-i)); // high front and low in the post
      while (digitalRead (DHpin) == HIGH); // data '1 ', wait for the next one receiver
     }
  }
return data;
}
 
void start_test () {
  digitalWrite (DHpin, LOW); // bus down, send start signal
  delay (30); // delay greater than 18ms, so DHT11 start signal can be detected
 
  digitalWrite (DHpin, HIGH);
  delayMicroseconds (40); // Wait for DHT11 response
 
  pinMode (DHpin, INPUT);
  while (digitalRead (DHpin) == HIGH);
  delayMicroseconds (80); // DHT11 response, pulled the bus 80us
  if (digitalRead (DHpin) == LOW);
  delayMicroseconds (80); // DHT11 80us after the bus pulled to start sending data
 
  for (int i = 0; i < 4; i ++) // receive temperature and humidity data, the parity bit is not considered
    dat[i] = read_data ();
 
  pinMode (DHpin, OUTPUT);
  digitalWrite (DHpin, HIGH); // send data once after releasing the bus, wait for the host to open the next Start signal
}
 
void setup () {
  debugSerial.begin(115200);
  loraSerial.begin(57600);

  delay(1000);
  ttu.init(loraSerial, debugSerial);
  ttu.reset();

  //the device will configure the LoRa module
  ttu.personalize(devAddr, nwkSKey, appSKey);

  delay(6000);
  ttu.showStatus();
  debugPrintLn("Setup for The Things Network complete");

  delay(1000);

  pinMode (DHpin, OUTPUT);
}
 
void loop () {
  start_test ();
  debugPrint ("Current humidity = ");
  debugPrint (dat [0], DEC); // display the humidity-bit integer;
  debugPrint ('.');
  debugPrint (dat [1], DEC); // display the humidity decimal places;
  debugPrintLn ('%');
  debugPrint ("Current temperature = ");
  debugPrint (dat [2], DEC); // display the temperature of integer bits;
  debugPrint ('.');
  debugPrint (dat [3], DEC); // display the temperature of decimal places;
  debugPrintLn ('C');

  //send data
  ttu.sendBytes(dat, sizeof(dat));

  delay (20000);
}