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

[ovrebekk]

Hi
Since I don't have the Arduino stuff up and running I had to dig out some old code to control the nRF24L01+ module from a Nordic kit.

I used the following code to configure the L01+ module:

static void l01_configure(void)
{
    l01_config_t l01_config = {1, 11, 12, 13, 14, 15, 16};
    hal_nrf_nrf52_init(&my_l01, &l01_config, l01_irq);
    
    nrf_delay_us(1500);
    
    hal_nrf_set_power_mode(HAL_NRF_PWR_UP);
        
    nrf_delay_us(1500);
		
    hal_nrf_set_crc_mode(HAL_NRF_CRC_16BIT);
    
    hal_nrf_set_datarate(HAL_NRF_2MBPS);
    
    hal_nrf_setup_dynamic_payload(0x3F);
    hal_nrf_enable_dynamic_payload(true);
}

The register readout after configuration was the following:

APP:INFO:  Reg 0x00: 0x0E
APP:INFO:  Reg 0x01: 0x3F
APP:INFO:  Reg 0x02: 0x03
APP:INFO:  Reg 0x03: 0x03
APP:INFO:  Reg 0x04: 0x03
APP:INFO:  Reg 0x05: 0x02
APP:INFO:  Reg 0x06: 0x0F
APP:INFO:  Reg 0x07: 0x0F
APP:INFO:  Reg 0x08: 0x93
APP:INFO:  Reg 0x09: 0x00
APP:INFO:  Reg 0x0A: 0xE7-0xE7-0xE7-0xE7-0xE7
APP:INFO:  Reg 0x0B: 0xC2-0xC2-0xC2-0xC2-0xC2
APP:INFO:  Reg 0x0C: 0xC3
APP:INFO:  Reg 0x0D: 0xC4
APP:INFO:  Reg 0x0E: 0xC5
APP:INFO:  Reg 0x0F: 0xC6
APP:INFO:  Reg 0x10: 0xE7-0xE7-0xE7-0xE7-0xE7
APP:INFO:  Reg 0x11: 0x00
APP:INFO:  Reg 0x12: 0x00
APP:INFO:  Reg 0x13: 0x00
APP:INFO:  Reg 0x14: 0x00
APP:INFO:  Reg 0x15: 0x00
APP:INFO:  Reg 0x16: 0x00
APP:INFO:  Reg 0x17: 0x21
APP:INFO:  Reg 0x18: 0x00
APP:INFO:  Reg 0x19: 0x00
APP:INFO:  Reg 0x1A: 0x00
APP:INFO:  Reg 0x1B: 0x00
APP:INFO:  Reg 0x1C: 0x3F
APP:INFO:  Reg 0x1D: 0x04

With this configuration I could send packets to an nRF51822 device, running the standard esb_prx example in the SDK.

Do you have two nRF51 boards?
If so I can probably share my code, and you can try to run the nRF24L01+ module straight from the Nordic DK and see if you can get that to work.

Regards