ArduinoNode - sends/receive data via WiFi with function

#include "Arduino.h"
#include <SPI.h>
#include <RF24.h>
#include "Timer.h"

// This is just the way the RF24 library works:
// Hardware configuration: Set up nRF24L01 radio on SPI bus (pins 10, 11, 12, 13) plus pins 7 & 8
RF24 radio(7, 8);

byte addresses[][6] = { "1Node","2Node" };


char poslji[] = "BITCH9";
char data;
char dataToSend[32];

int temp = 18;

Timer t;
// -----------------------------------------------------------------------------
// SETUP   SETUP   SETUP   SETUP   SETUP   SETUP   SETUP   SETUP   SETUP
// -----------------------------------------------------------------------------
void setup() {
	Serial.begin(9600);
	Serial.println("THIS IS THE RECEIVER CODE - YOU NEED THE OTHER ARDUINO TO TRANSMIT");

	// Initiate the radio object
	radio.begin();

	// Set the transmit power to lowest available to prevent power supply related issues
	radio.setPALevel(RF24_PA_MIN);

	// Set the speed of the transmission to the quickest available
	radio.setDataRate(RF24_2MBPS);

	// Use a channel unlikely to be used by Wifi, Microwave ovens etc
	radio.setChannel(124);

	// Open a writing and reading pipe on each radio, with opposite addresses
	// radio.openWritingPipe(addresses[0]);
	// radio.openReadingPipe(1, addresses[1]);

	// Start the radio listening for data
	radio.startListening();

	t.every(5000, sendTemperature);

}

// -----------------------------------------------------------------------------
// We are LISTENING on this device only (although we do transmit a response)
// -----------------------------------------------------------------------------
void loop() {

	t.update();

	if (radio.available()) {
		char preberi[32];
		radio.read(&preberi, sizeof(preberi));
		// Serial.println(preberi);

		String dataReq(preberi);

		String type = dataReq.substring(0, 3);
		int pin = dataReq.substring(3, 5).toInt();
		int state = dataReq.substring(5, 6).toInt();

		// Serial.println("Type: " + type + " Pin: " + pin + " State: " + state);

		if (type == "RLY") {
			digitalWrite(pin, state);
		}

	}

	/*
	radio.stopListening();
	// radio.write(&poslji, sizeof(poslji));
	radio.write(&poslji, sizeof(poslji));
	// if (radio.write(&poslji, sizeof(poslji))) Serial.println("We did it!");
	radio.startListening();
	*/
}



void sendTemperature() {
	String address = "2Node";
	// radio.openReadingPipe(1, addresses[1]);
	radio.openReadingPipe(1, "2Node");

	String temperature = String(temp) + ".50";
	// String temperature = "25.50";

	String sendData = "TMP=" + temperature + "2Node";
	sendData.toCharArray(dataToSend, 32);

	radio.stopListening();

	radio.write(&dataToSend, sizeof(dataToSend));

	radio.startListening();
	Serial.println(temperature);
	if (temp > 35) temp = 19;
	temp++;

}