RF69_CLIENT_SEND_DATA.ino

// Example sketch showing how to create a simple messageing client
// with the RH_RF69 class. RH_RF69 class does not provide for addressing or
// reliability, so you should only use RH_RF69  if you do not need the higher
// level messaging abilities.
// It is designed to work with the other example rf69_server.
// Demonstrates the use of AES encryption, setting the frequency and modem
// configuration
// Tested on Moteino with RFM69 http://lowpowerlab.com/moteino/
// Tested on miniWireless with RFM69 www.anarduino.com/miniwireless
// Tested on Teensy 3.1 with RF69 on PJRC breakout board
// code modified by Velleman (nl)

#include <SPI.h>
#include <RH_RF69.h>

/*#if defined (__AVR_ATmega328P__)  // (Arduino Uno
#define RFM69_INT     3  // 
#define RFM69_CS      4  //
#define RFM69_RST     2  // "A"
#define LED           13
#endif
*/

// Singleton instance of the radio driver
RH_RF69 rf69;
//RH_RF69 rf69(RFM69_CS, RFM69_INT);

int ThermistorPin = A0;
int Vo;
float R1 = 10000; // value of R1 on board
float logR2, R2, T ;
float c1 = 0.001129148, c2 = 0.000234125, c3 = 0.0000000876741; //steinhart-hart coeficients for thermistor
char Tempvals[50];

void setup()
{
  Serial.begin(9600);
 // pinMode(LED, OUTPUT);
 // pinMode(RFM69_RST, OUTPUT);
//  digitalWrite(RFM69_RST, LOW);
  while (!Serial)
    ;
  if (!rf69.init())
    Serial.println("init failed");
  // Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM (for low power module)
  // No encryption
  if (!rf69.setFrequency(433.0))
    Serial.println("setFrequency failed");

  // If you are using a high power RF69 eg RFM69HW, you *must* set a Tx power with the
  // ishighpowermodule flag set like this:
  rf69.setTxPower(14, true);

  // The encryption key has to be the same as the one in the server
  uint8_t key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                    0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08
                  };
  rf69.setEncryptionKey(key);
}


void loop()
{
  Serial.println("Sending to rf69_server");
  // Send a message to rf69_server

  Vo = analogRead(ThermistorPin);
  R2 = R1 * (1023.0 / (float)Vo - 1.0); //calculate resistance on thermistor
  logR2 = log(R2);
  T = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2)); // temperature in Kelvin
  T = T - 273.15; //convert Kelvin to Celcius
  // T = (T * 9.0)/ 5.0 + 32.0; //convert Celcius to Farenheit
  //  Serial.print("Temperature: ");
  //  Serial.print(T);
  //  Serial.println("C");
 
  dtostrf(T,5,2,Tempvals);
  rf69.send((Tempvals), sizeof(Tempvals));

  rf69.waitPacketSent();
  // Now wait for a reply
  uint8_t buf[RH_RF69_MAX_MESSAGE_LEN];
  uint8_t len = sizeof(buf);

  if (rf69.waitAvailableTimeout(500))
  {
    // Should be a reply message for us now
    if (rf69.recv(buf, &len))
    {
      Serial.print("Server respond: ");
      Serial.println((char*)buf);
    }
    else
    {
      Serial.println("recv failed");
    }
  }
  else
  {
    Serial.println("No reply, is rf69_server running?");
  }
  delay(400);
}