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.
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.
Hello sir,
Print details for the following Receiver Code :
#include <SPI.h>
#include "printf.h"
#include <nRF24L01.h>
#include <RF24.h>
#define CE 18
#define CSN 19
RF24 radio(CE, CSN);
unsigned char values;
const byte rxAddr[5] = {0xC0,0x01,0x23,0x45,0x67};
void setup()
{
Serial.begin(9600);
printf_begin();
radio.begin();
radio.setPALevel(RF24_PA_MAX);
radio.setDataRate(RF24_1MBPS);
radio.setChannel(7);
radio.openReadingPipe(0, rxAddr);
radio.startListening();
}
void loop()
{
if (radio.available())
{
char text;
radio.read(&text, 1);
Serial.print("####### Data Received :");
Serial.print(text);
Serial.println(" #######");
radio.printDetails() ;
}
}
Receiver Prints:
####### 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 = 0x67452301c0 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 = 0x07
RF_SETUP = 0x07
CONFIG = 0x0f
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX
####### 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 = 0x67452301c0 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 = 0x07
RF_SETUP = 0x07
CONFIG = 0x0f
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX
Transmitter Code:
#include <SPI.h>
#include "printf.h"
#include <nRF24L01.h>
#include <RF24.h>
#define CE 18
#define CSN 19
RF24 radio(CE, CSN);
char values;
const byte rxAddr[5] = {0xC0,0x01,0x23,0x45,0x67};
void setup()
{
Serial.begin(9600);
printf_begin();
radio.begin();
radio.setPALevel(RF24_PA_MAX);
radio.setDataRate(RF24_1MBPS);
radio.setChannel(7);
radio.openWritingPipe(rxAddr);
radio.stopListening();
}
void loop()
{
values = 'A';
radio.write(&values,1);
Serial.print("####### Data Transmitted :");
Serial.print(values);
Serial.println(" #######");
radio.printDetails() ;
delay(2000);
}
Transmitter Prints:
####### 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 = 0x67452301c0 0xc2c2c2c2c2
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0x67452301c0
RX_PW_P0-6 = 0x01 0x00 0x00 0x00 0x00 0x00
EN_AA = 0x3f
EN_RXADDR = 0x03
RF_CH = 0x07
RF_SETUP = 0x07
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX
####### 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 = 0x67452301c0 0xc2c2c2c2c2
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0x67452301c0
RX_PW_P0-6 = 0x01 0x00 0x00 0x00 0x00 0x00
EN_AA = 0x3f
EN_RXADDR = 0x03
RF_CH = 0x07
RF_SETUP = 0x07
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX
Hope this will help, sir please help i am unable to communicate with nrf51 for along.
Thanks and Regards Pallavi
Hi Pallavi
I still don't understand why you couldn't get it to work with dynamic payload length enabled. I have been able to do that with both an nRF24L01+ and an nRF24L01 module, without any issues (the main difference is I used address 0xE7E7E7E7E7).
That being said, I do see an issue when using the configuration you included above (dynamic payload length disabled). In this mode I see that the nRF51 receives the packet in the debugger, but for some reason the CRC fails and the packet is discarded.
I will have to do some more research to figure out why the packet is discarded in this case, and I will get back to you when I know more.
Best regards
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
Hi Pallavi
I finally got my Arduino Uno board running, and hooked it up to an nRF24L01 module.
For the longest time I couldn't get it to work, until I realized (by scoping the SPI lines) that the radio.write(..) function sends a 32 byte payload, regardless of what you set the length value to be. Apparently this is intended (the documentation mentions it), but it is a bit unusual.
Once I corrected that I had no issues getting the Arduino + nRF24L01 to transmit to the nRF51822, by using a stripped down version of one of the radio examples.
Arduino side:
#include <SPI.h>
#include "RF24.h"
/* Hardware configuration: Set up nRF24L01 radio on SPI bus plus pins 7 & 8 */
RF24 radio(7,8);
/**********************************************************/
byte address[] = {0xE7,0xE7,0xE7,0xE7,0xE7,0};
// Function that printf and related will use to print
int serial_putchar(char c, FILE* f) {
if (c == '\n') serial_putchar('\r', f);
return Serial.write(c) == 1? 0 : 1;
}
FILE serial_stdout;
void setup() {
Serial.begin(115200);
// Set up stdout
fdev_setup_stream(&serial_stdout, serial_putchar, NULL, _FDEV_SETUP_WRITE);
stdout = &serial_stdout;
Serial.println(F("RF24/examples/GettingStarted"));
Serial.println(F("*** PRESS 'T' to begin transmitting to the other node"));
radio.begin();
// Set the PA Level low to prevent power supply related issues since this is a
// getting_started sketch, and the likelihood of close proximity of the devices. RF24_PA_MAX is default.
radio.setPALevel(RF24_PA_LOW);
radio.openWritingPipe(address);
radio.openReadingPipe(0,address);
radio.printDetails();
}
void loop() {
Serial.println(F("Now sending"));
unsigned long start_time = micros(); // Take the time, and send it. This will block until complete
if (!radio.write( &start_time, sizeof(unsigned long))){
Serial.println(F("failed"));
}
// Try again 1s later
delay(1000);
} // Loop
nRF51822 ESB init:
uint32_t esb_init( void )
{
uint32_t err_code;
uint8_t base_addr_0[4] = {0xE7, 0xE7, 0xE7, 0xE7};
uint8_t base_addr_1[4] = {0xC2, 0xC2, 0xC2, 0xC2};
uint8_t addr_prefix[8] = {0xE7, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8 };
nrf_esb_config_t nrf_esb_config = NRF_ESB_DEFAULT_CONFIG;
nrf_esb_config.payload_length = 32;
nrf_esb_config.protocol = NRF_ESB_PROTOCOL_ESB;
nrf_esb_config.bitrate = NRF_ESB_BITRATE_1MBPS;
nrf_esb_config.crc = NRF_ESB_CRC_16BIT;
nrf_esb_config.mode = NRF_ESB_MODE_PRX;
nrf_esb_config.event_handler = nrf_esb_event_handler;
nrf_esb_config.selective_auto_ack = false;
err_code = nrf_esb_init(&nrf_esb_config);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_base_address_0(base_addr_0);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_base_address_1(base_addr_1);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_prefixes(addr_prefix, 8);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_rf_channel(76);
VERIFY_SUCCESS(err_code);
return err_code;
}
In other words, the critical aspect for me was to set the payload_length to 32 on the nRF51 side.
Can you try those settings and see if it also works for you?
Best regards