Nrf24l01 Putting Slave in sleep Mode

Projects Programming
8

Hello,

Transmitting data from multiple slaves to master, and making the master as receiver only i tried following code but didn't get any result

For slave:

// SimpleRx - the slave or the receiver

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

#define CE_PIN   9
#define CSN_PIN 10

const byte thisSlaveAddress[5] = {'R','x','A','A','A'};
int buttonInput = 2;
int pir1;

RF24 radio(CE_PIN, CSN_PIN);
char pirData[5]="ON 0";
bool newData = false;

//===========

void setup() {

    Serial.begin(9600);
    pinMode(buttonInput,INPUT_PULLUP);
    Serial.println("SimpleSleepMode Slave");
    radio.begin();
    radio.setDataRate( RF24_250KBPS );
    radio.startListening();
    radio.writeAckPayload(1, &pirData, sizeof(pirData)); 
}

//=============

void loop() {
  pir1 = digitalRead(buttonInput);
    
pirTest();
}

//==============





void pirTest()
{
if(pir1 == HIGH)
{
  Serial.println("PIR 1");
  strncpy(pirData, "ON 1", 5);
}

else if(pir1 == LOW)
{
    Serial.println("PIR LOW");
 strncpy(pirData, "ON 0", 5);
}
delayMicroseconds(500);
radio.writeAckPayload(1, &pirData, sizeof(pirData)); // load the payload for the next time

}

and for master

// SimpleTx - the master or the transmitter

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


#define CE_PIN   9
#define CSN_PIN 10


const byte numSlaves = 2;
const byte slaveAddress[numSlaves][5] = {
        // each slave needs a different address
                            {'R','x','A','A','A'},
                            {'R','x','A','A','B'}
                        };

RF24 radio(CE_PIN, CSN_PIN); // Create a Radio



char pirDataReceived[5];
bool newData = false;

unsigned long currentMillis;
unsigned long prevMillis;
unsigned long txIntervalMillis = 250; // send once per second


void setup() {

    Serial.begin(9600);

    Serial.println("SleepMode Master");
   
   
    radio.begin();
    radio.setDataRate( RF24_250KBPS );
    radio.setRetries(3,5); // delay, count
  //  radio.openWritingPipe(slaveAddress);
    radio.openReadingPipe(1,slaveAddress);
    radio.startListening();
}

//====================

void loop() {

    
    currentMillis = millis();
    if (currentMillis - prevMillis >= txIntervalMillis) {
        send();
        prevMillis = millis();
    }
}

//====================
void send() {

        // call each slave in turn
    for (byte n = 0; n < numSlaves; n++){

          
                        radio.read(&pirDataReceived, sizeof(pirDataReceived));
                newData = true;
                call();
                showData();
        Serial.print("\n");
    }

    prevMillis = millis();
 }


//================



//=================

void showData() {
    if (newData == true) {
        Serial.println("  Acknowledge data ");
        Serial.println(pirDataReceived);
        
        newData = false;
    }
}
void call()
{

  if(strcmp(pirDataReceived,"ON 1")==0)
  {
    Serial.println("Led 1On");
  }
  else if(strcmp(pirDataReceived,"ON 2")==0)
  {
    Serial.println("Led 2On");
  }
  else if(strcmp(pirDataReceived,"ON 0")==0)
  {
    Serial.println("Led Off");
  }
}

the transfer of data is not successful. what can be the possible reason?