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]

sir these settings i have done on the nrf24l01 side.will you please tell me is these settings are write for nrf24l01 as a transmitter.

on nrf24l01 side prograaming ide is arduino.and in nrf51 side using keil ide in nrf51 side i used sdk 12.2.0 and the code from this is esb_prx. but i am failing to do communication between nrf24l01 anf nrf51.

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

RF24 radio(18, 19);
String TEXT="";
int x=0;
//const byte rxAddr[6] = "00001";
const byte rxAddr[5] = {0xE7,0xE7,0xE7,0xE7,0xE7};
char values;
void setup()
{
  Serial.begin(9600);
  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(rxAddr);

  
  radio.stopListening();
}

void loop()
{
//  Serial.print("value");
 // if(Serial.available()) {    
    
  //   while (Serial.available()>0){
        
       values = '1';
        
         radio.write(&values,1);
         delay(500);
      //  Serial.print(value);  //prints the character just read
}
     
//Serial.println();

[ovrebekk]

Hi

What kind of hardware are you using on the nRF24L01+ side? Just a regular Arduino Uno?

Have you been able to verify the Arduino/nRF24L01+ kit in isolation by using a similar kit as the receiver, or could there be issues on the Arduino side as well?

Best regards
Torbjørn

[pallavi]

i am using arduino uno board. i have done the tx rx communication of nrf24l01+arduino with another nrf24l01+arduino uno;with the above same specifications of rf. but it is not working with nrf51822. as you told i have used radio.enableAckPayload(); //function for enabling the Auto ACK and radio.enableDynamicPayloads(); // function for enabling the dynamic payload is these are write functions i am using for the two purposes,Auto ACK and enabling the dynamic payload.

[ovrebekk]

Hi

Can you run the printDetails() function on the Arduino side after you have configured the radio, and let me know what you get?

Best regards

[pallavi]

hello sir, these are the details aftyer executing printDetails(); function

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	 = 0x01 0x00 0x00 0x00 0x00 0x00
EN_AA		 = 0x3f
EN_RXADDR	 = 0x03
RF_CH		 = 0x4c
RF_SETUP	 = 0x0f
CONFIG		 = 0x0e
DYNPD/FEATURE	 = 0x3f 0x06
Data Rate	 = 2MBPS
Model		 = nRF24L01+
CRC Length	 = 16 bits
PA Power	 = PA_MAX

Pallavi