Need Help bout nrf

Using Arduino Networking, Protocols, and Devices
#1

Transmitter

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"

#define tempPin 0
RF24 radio(9,10);

int temp;
float tempC;

const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup()
{
	Serial.begin(9600);
	Serial.print("LM35 Test Program");
	Serial.println();
	radio.begin();
	radio.openWritingPipe(pipe);
}

void loop()
{
	temp = analogRead(tempPin);
	tempC = (temp * 5.0 * 100.0/1024.0);
	Serial.print("Read Sensor : ");
	Serial.print(tempC);
	Serial.println(" C");
	radio.write(&tempC,sizeof(tempC));
	delay(1000);
}

receiver

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"

RF24 radio(9,10);

float temp;

const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup(void)
{
	Serial.begin(9600);
	radio.begin();
	radio.openReadingPipe(1,pipe);
	radio.startListening();
}

void loop(void)
{
	if(radio.available())
	{
		bool done = false;
		while(!done)
		{
			done = radio.read(&temp,sizeof(temp));
			Serial.print("Suhu : ");
			Serial.print(temp);
			Serial.println(" C");
		}
	}
	else
	{
		Serial.println("No Radio Available");
	}
	delay(1000);
}

in rx just no radio avaible
help thx
this the screenshot http://imgur.com/GeflQk7

#2

Hi granzil

Does it help if you add this after radio.begin()?

radio.powerUp() ;

There was a recent thread where the OP had the same "radio not available" problem. He fixed it by using code from this thread:

Regards

Ray

#3

ok thx for respon..
im adding radio power up remain same no radio avaible

#4

hi… already follow in other forum but
transmitter

#include <SPI.h>
#include <RF24.h>
#include <dht11.h>

#define CE 9
#define CSN 10
#define dht11Pin 2

RF24 radio(CE, CSN);
dht11 suhu;
int nilai;
int temp;

const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

void setup() 
{  
  Serial.begin(9600);
  radio.begin();
  radio.openWritingPipe(pipes[0]);
  radio.openReadingPipe(1,pipes[1]);
  radio.enableDynamicPayloads() ;
  radio.setAutoAck(true);
  radio.setDataRate(RF24_1MBPS);
  radio.powerUp();  
}

void loop() 
{
  nilai = suhu.read(dht11Pin);              //baca data sensor
  temp = suhu.temperature;
  Serial.print("Suhu = ");
  Serial.print(temp);
  Serial.println(" C");
  Serial.println();
  
  radio.write(&temp, sizeof(int));
  
  delay(1000);
}

receiver

#include <SPI.h>
#include <RF24.h>

#define CE 9
#define CSN 10

RF24 radio(CE, CSN);
int suhu;

const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

void setup() 
{
  Serial.begin(9600);
  radio.begin();
  radio.openWritingPipe(pipes[1]);
  radio.openReadingPipe(1,pipes[0]);
  radio.enableDynamicPayloads() ;
  radio.setAutoAck(true);
  radio.setDataRate( RF24_1MBPS );
  radio.powerUp() ;
  radio.startListening();
  Serial.println("RX ready...");
  Serial.println();
}

void loop()
{
  while (radio.available())
  {
    radio.read(&suhu, sizeof(int));
    Serial.print("Suhu = ");
    Serial.print(suhu);
    Serial.println(" C");
    Serial.println();
  }
  delay(20);
}

tenperatur sent if I close monitor tx and re open and in rx only get 1 or 2 information temperature
need help thx b4
Imgur

#5

I don’t think those pin assignments are correct for RF24 lib. They look like the NRF24 LIB pin assignments.

http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo

According to the second link they are correct.

arduino-RF24- Nrf24L01-2.4GHz-PINOUTS.htm (86.6 KB)

rf24 pinouts.png

#6

thx for respon bro.my pin is right .. but.. i think i cannot join nrf and 433mhz.... it will wrong information.. so i wanna asking using nrf24l01 im want using for send value temperature if temp >30 fan on.. and can i send back.. for turn off the fan. the fan using relay.. onliy using nrf24l01 half duplex
and my friend asking how to he send a sensor data to receiver and the receiver send data back using nrf24l01
thx b4

#7

Look at the examples in the RF24 LIBRARY. There is an example that controls a led connected to receiver based on a button pressed on transmitter. There is also an example with six buttons controlling six leds on receiver end.

#8

ok thx raschemmel, so this my coding for transmit the dht11 sensor using nrf but for send back… what i need?
transmitter

#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <SPI.h>

int msg;
RF24 radio(9,10);
const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

void setup(void)
{
  Serial.begin(9600);
  radio.begin();
  radio.openWritingPipe(pipes[0]);
  radio.openReadingPipe(1,pipes[1]);
  radio.startListening();
}

void loop(void)
{
  if (radio.available())
  {
    bool done = false;
    done = radio.read(&msg,sizeof(msg));
    Serial.print("Suhu : ");
    Serial.println(msg);
  }
}

receiver

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <dht11.h>

#define dht11Pin 2

int msg[1];
dht11 suhu;
int temp;
RF24 radio(9,10);
const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

void setup(void)
{
  Serial.begin(9600);
  radio.begin();
  radio.openWritingPipe(pipes[0]);
  radio.openReadingPipe(1,pipes[1]);
}

void loop(void)
{
  temp = suhu.read(dht11Pin);
  Serial.println(suhu.temperature);
  
  msg[0] = suhu.temperature; 
  radio.write(msg,1);

  radio.powerDown(); 
  delay(1000);
  radio.powerUp();
}
#9

Did you look at the examples ?

#10

did you look at this ?
http://playground.arduino.cc/InterfacingWithHardware/Nrf24L01

http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo

http://www.insidegadgets.com/2012/08/22/using-the-nrf24l01-wireless-module/

http://www.diyembedded.com/tutorials/nrf24l01_0/nrf24l01_tutorial_0.pdf

#11

Hi ,please put a radio.printDetails() in the setup void , and with that at the top #include "printf.h" and before radio.begin put a printf_begin(). Attach the serial output , and some information about your connections would be good (eg. MOSI=pin x, SCK=pin y ).
Andrei

#12