https://devzone.nordicsemi.com/f/nordic-q-a/6840/nrf24l01-as-tx-and-nrf51822-as-rxI have a nRF24L01+ connecting to an Arduino board using the RF24 library code. It is a print of the registers: On the nRF51822 I have the following code: int main() { // Initialize ESB (void)nrf_esb_init(NRF_ESB_MODE_PRX); nrf_esb_set_base_address_lengthen-USTelligent Community 13Wed, 06 May 2015 09:51:53 GMThttps://devzone.nordicsemi.com/thread/24108?ContentTypeID=1Wed, 06 May 2015 09:51:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a0fb075-8eed-4cbe-a463-021aab669e7bJose Xavier<p>It was indeed a address problem, thank you.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/24107?ContentTypeID=1Mon, 04 May 2015 14:29:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0ee471af-4837-43a8-b8da-5eb8bce0e764ovrebekk<p>Hi Jose</p> <p>In my experience most of the compatibility issues between the nRF24L and nRF51 series are address related, as the address configuration is handled quite differently between them.</p> <p>To see if this is the issue for you as well could you please try to configure both devices with the following address? 0xE7, 0xE7, 0xE7, 0xE7, 0xE7</p> <p>Then we will know if its address related or not, making it easier to isolate the issue.</p> <p>Regards Torbjørn</p><div style="clear:both;"></div>