https://devzone.nordicsemi.com/f/nordic-q-a/2049/nrf24l01-with-atmega8-32I have bought from ebay 10 nRF24L01 and I&#39;m trying work on a ,for more that 7 days, project sending 7bytes data. I have build (on a breadboard) the circuit described on that thread davidegironi.blogspot.gr/.../nrf24l01-atmega-library-and-development.htmlen-USTelligent Community 13Thu, 10 Apr 2014 13:00:54 GMThttps://devzone.nordicsemi.com/thread/8796?ContentTypeID=1Thu, 10 Apr 2014 13:00:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:201739dd-b4a4-4f0d-9016-d8066267dee4Asbj&#248;rn<p>Usually it&#39;s something of the basics that missing. Are you able to measure the VDD on the chip itself on the module? Are you able to see SPI traffic on the SPI pins during configuration? Do you see any interrupts fired on the TX or the RX? If you have a oscilloscope it&#39;s a neat little trick to measure on the pin named VDD_PA on the nRF24L01. That pin will go up to 1.8 V during transmission. So on the TX side of your link it should go high as often as you try to send a package.</p> <p>It&#39;s difficult to say where it goes wrong right now, but if you could do some of these measurements/tests it would narrow down the possible sources.</p><div style="clear:both;"></div>