want nrf24l01 communication with nrf51822

[pallavi]

hello,will you please tell me which code i have to use in the sdk 12.2.0 for rf communication with nrf51822 and nrf24l01 .and also tell me which settings i have to do for nrf24l01 side as a transmitter.so that i can receive data on nrf51822 side.

[ovrebekk]

Hi Pallavi

The ESB library in the nRF5 SDK v12.2.0 is designed to be backwards compatible with the nRF24L01/nRF24L01+, assuming you don't use the L01 device in legacy Shockburst mode (ACK's disabled).

On the nRF5 side you can use the esb_ptx and esb_prx examples as a starting point: \nRF5_SDK_12.2.0\examples\proprietary_rf\

For this to work you need the following settings on the nRF24L01 side:
Default address (0xE7E7E7E7E7), with 5 byte address length
16-bit CRC
2Mbps bitrate
Auto ACK and dynamic payload length enabled

For all other settings you can use the default values.

Edit: Added attachment.

Best regards
Torbjørn

[pallavi]

hello sir, i have also tried with your configurations i.e address 0xe7e7e7 and enabling dynamic payload length, it works fine with both the arduino+nrf24l01. but will not work with nrf51822.the code i have used on nrf51822 side is esb_prx from the pro[pritary_rf folder:

Transmitter code is,

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include "printf.h"  
#define CE 18
#define CSN 19
RF24 radio(CE, CSN);


int x=0;
//const byte rxAddr[6] = "00001";
const byte txAddr[5] = {0xE7,0xE7,0xE7,0xE7,0xE7};
char values;
void setup()
{
  Serial.begin(9600);
    printf_begin();

  radio.begin();
 //radio.setPALevel(RF24_PA_MAX);
  radio.setDataRate(RF24_2MBPS);
 // radio.setChannel(7);
//  radio.setRetries(15,15);
 radio.setCRCLength(RF24_CRC_16);
//radio.enableAckPayload();
radio.enableDynamicPayloads();
radio.openWritingPipe(txAddr);
radio.stopListening();
}

void loop()
{
values = 'A';
         radio.write(&values,1);
         Serial.print("####### Data Transmitted :");
    Serial.print(values);
    Serial.println(" #######");
         radio.printDetails() ;
         delay(2000);

}

transmitter print details are:


.####### Data Transmitted :A #######
.STATUS.. = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
.RX_ADDR_P0-1. = 0xe7e7e7e7e7 0xc2c2c2c2c2
.RX_ADDR_P2-5. = 0xc3 0xc4 0xc5 0xc6
.TX_ADDR.. = 0xe7e7e7e7e7
.RX_PW_P0-6. = 0x20 0x00 0x00 0x00 0x00 0x00
.EN_AA.. = 0x3f
.EN_RXADDR. = 0x03
.RF_CH.. = 0x4c
.RF_SETUP. = 0x0f
.CONFIG.. = 0x0e
.DYNPD/FEATURE. = 0x3f 0x04
.Data Rate. = 2MBPS
.Model.. = nRF24L01+
.CRC Length. = 16 bits
.PA Power. = PA_MAX


the receiver code is,

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include "printf.h"  
#define CE 18
#define CSN 19
RF24 radio(CE, CSN);


int x=0;
//const byte rxAddr[6] = "00001";
const byte rxAddr[5] = {0xE7,0xE7,0xE7,0xE7,0xE7};
char values;
void setup()
{
  Serial.begin(9600);
    printf_begin();

  radio.begin();
 //radio.setPALevel(RF24_PA_MAX);
  radio.setDataRate(RF24_2MBPS);
 // radio.setChannel(7);
//  radio.setRetries(15,15);
 radio.setCRCLength(RF24_CRC_16);
//radio.enableAckPayload();
radio.enableDynamicPayloads();
 radio.openReadingPipe(0, rxAddr);
  radio.startListening();
}

void loop()
{
 char text;
    radio.read(&text, 1);
    Serial.print("####### Data Received :");
    Serial.print(text);
    Serial.println(" #######");
    radio.printDetails() ;
}

print detauils of receiver are as

####### Data Received :A #######
.STATUS.. = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
.RX_ADDR_P0-1. = 0xe7e7e7e7e7 0xc2c2c2c2c2
.RX_ADDR_P2-5. = 0xc3 0xc4 0xc5 0xc6
.TX_ADDR.. = 0xe7e7e7e7e7
.RX_PW_P0-6. = 0x20 0x00 0x00 0x00 0x00 0x00
.EN_AA.. = 0x3f
.EN_RXADDR. = 0x03
.RF_CH.. = 0x4c
.RF_SETUP. = 0x0f
.CONFIG.. = 0x0f
.DYNPD/FEATURE. = 0x3f 0x04
.Data Rate. = 2MBPS
.Model.. = nRF24L01+
.CRC Length. = 16 bits
.PA Power. = PA_MAX

sir please go through this and match the settings now with your code and because i had changed my address anabled dynamic payload. after that it doesnt work.

and the code i previously given that code i am trying to compatible it with code from the peripheral folder the code is radio.thats why you told that it is bit different but now i have posted both the codes go please refer these codes and tell me actually what is going wrong with nrf51822.both codes i.e radio and esb_prx for nrf51822 is not working.and if you had done this then can you share the code with me i.e code from arduino side and code from nrf51822 side. i dont have any issue with the specification .my intension is just that to make communication between nrf51822 and arduino+nrf24l01.

waiting for your reply.

Pallavi