Problem in transferring an array between two NRF24l01,

hi fellows
im trying to send values of 4 LDRs to another arduino using NRFby storing values in an array
but the code doesnt seems working.

transmitter:

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
/-----( Declare Constants and Pin Numbers )-----/
#define CE_PIN 9
#define CSN_PIN 10

// NOTE: the "L" at the end of the constant is "Long" type
const uint64_t pipe = 0xE8E8F0F0E1LL; // Define the transmit pipe
/-----( Declare objects )-----/
RF24 radio(CE_PIN, CSN_PIN); // Create a Radio
/-----( Declare Variables )-----/
int ldrlt = 0; //LDR top left - BOTTOM LEFT <--- BDG
int ldrrt = 1; //LDR top rigt - BOTTOM RIGHT
int ldrld = 2; //LDR down left - TOP LEFT
int ldrrd = 3; //ldr down rigt - TOP RIGHT
//---------------------------------------------------------

int sensor[4];

void setup() {
Serial.begin(9600);
radio.begin();
radio.openWritingPipe(pipe);
radio.setPALevel(RF24_PA_MIN);
radio.stopListening();

// horizontal.attach(6);
// vertical.attach(5);
// horizontal.write(180);
// vertical.write(20);
delay(1000);
}
void loop() {

int lt = analogRead(ldrlt); // top left
int rt = analogRead(ldrrt); // top right
int ld = analogRead(ldrld); // down left
int rd = analogRead(ldrrd); // down rigt

sensor[0] = lt;
sensor[1] = rt;
sensor[2] = ld;
sensor[3] = rd;
radio.write(&sensor, sizeof(sensor));
if (!radio.write(&sensor, sizeof(sensor)))
{
Serial.println("IT didnt work");
}
else {
Serial.print("S1 = ");
Serial.print(sensor[0]);
Serial.print(" S2 = ");
Serial.print(sensor[1]);
Serial.print(" S3 = ");
Serial.print(sensor[2]);
Serial.print(" S4 = ");
Serial.print(sensor[3]);
Serial.println("");
}
delay(10);

}

Reciever:

// include the library code:
#include <Servo.h> //Servo library
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
/-----( Declare Constants and Pin Numbers )-----/
#define CE_PIN 9
#define CSN_PIN 10

// NOTE: the "LL" at the end of the constant is "LongLong" type
const uint64_t pipe = 0xE8E8F0F0E1LL; // Define the transmit pipe
/-----( Declare objects )-----/
RF24 radio(CE_PIN, CSN_PIN); // Create a Radio
/-----( Declare Variables )-----/
int ldrlt = 0; //LDR top left - BOTTOM LEFT <--- BDG
int ldrrt = 1; //LDR top rigt - BOTTOM RIGHT
int ldrld = 2; //LDR down left - TOP LEFT
int ldrrd = 3; //ldr down rigt - TOP RIGHT
//---------------------------------------------------------

int sensor[4];

void setup() {
Serial.begin(9600);
radio.begin();
radio.openReadingPipe(0, pipe);
radio.startListening();
// horizontal.attach(6);
// vertical.attach(5);
// horizontal.write(160);
// vertical.write(20);
delay(3000);
}
void loop() {

if ( radio.available() )
{
int sensor[4];

// Read the data payload until we've received everything
bool done = false;

// Fetch the data payload
radio.read(&sensor,sizeof(sensor) );
Serial.print("S1 = ");
Serial.print(sensor[0]);
Serial.print(" S2 = ");
Serial.print(sensor[1]);
Serial.print(" S3 = ");
Serial.print(sensor[2]);
Serial.print(" S4 = ");
Serial.print(sensor[3]);
Serial.println("");

int lt = sensor[0];
int rt = sensor[1];
int ld = sensor[2];
int rd = sensor[3];

}

delay(100);
}

Transmitter:

radio.write(&sensor, sizeof(sensor)) ;
if (!radio.write(&sensor, sizeof(sensor)))
. . .

This repeats the transmission. Remove the first one.

Receiver:

int sensor[4] ; // repeated definition. Remove one.

delay(100) ; // remove this. The receiver could be blocked and not see the transmission.

This Simple nRF24L01+ Tutorial may help.

Wireless problems can be very difficult to debug so get the wireless part working on its own before you start adding any other features.

The examples are as simple as I could make them and they have worked for other Forum members. If you get stuck it will be easier to help with code that I am familiar with. Start by getting the first example to work

...R

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