Hi, I just loaded both Basic_Rx and Basic_tx examples from the NRF24 library. The Tx works but not the RX. I exchanged both and it's still the TX that works. The connections are good. I use two arduino UNO and two NRF24 with antenna. I do not understand what does not work. Something I do not spot in the program or a known error ? 
TX program :
/*
Demonstrates simple RX and TX operation.
Any of the Basic_RX examples can be used as a receiver.
Please read through 'NRFLite.h' for a description of all the methods available in the library.
Radio Arduino
CE -> 9
CSN -> 10 (Hardware SPI SS)
MOSI -> 11 (Hardware SPI MOSI)
MISO -> 12 (Hardware SPI MISO)
SCK -> 13 (Hardware SPI SCK)
IRQ -> No connection
VCC -> No more than 3.6 volts
GND -> GND
*/
#include <SPI.h>
#include <NRFLite.h>
const static uint8_t RADIO_ID = 1; // Our radio's id.
const static uint8_t DESTINATION_RADIO_ID = 0; // Id of the radio we will transmit to.
const static uint8_t PIN_RADIO_CE = 9;
const static uint8_t PIN_RADIO_CSN = 10;
struct RadioPacket // Any packet up to 32 bytes can be sent.
{
uint8_t FromRadioId;
uint32_t OnTimeMillis;
uint32_t FailedTxCount;
};
NRFLite _radio;
RadioPacket _radioData;
void setup()
{
Serial.begin(115200);
// By default, 'init' configures the radio to use a 2MBPS bitrate on channel 100 (channels 0-125 are valid).
// Both the RX and TX radios must have the same bitrate and channel to communicate with each other.
// You can run the 'ChannelScanner' example to help select the best channel for your environment.
// You can assign a different bitrate and channel as shown below.
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE250KBPS, 0)
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE1MBPS, 75)
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE2MBPS, 100) // THE DEFAULT
if (!_radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN))
{
Serial.println("Cannot communicate with radio");
while (1); // Wait here forever.
}
_radioData.FromRadioId = RADIO_ID;
}
void loop()
{
_radioData.OnTimeMillis = millis();
Serial.print("Sending ");
Serial.print(_radioData.OnTimeMillis);
Serial.print(" ms");
// By default, 'send' transmits data and waits for an acknowledgement. If no acknowledgement is received,
// it will try again up to 16 times. You can also perform a NO_ACK send that does not request an acknowledgement.
// The data packet will only be transmitted a single time so there is no guarantee it will be successful. Any random
// electromagnetic interference can sporatically cause packets to be lost, so NO_ACK sends are only suited for certain
// types of situations, such as streaming real-time data where performance is more important than reliability.
// _radio.send(DESTINATION_RADIO_ID, &_radioData, sizeof(_radioData), NRFLite::NO_ACK);
_radio.send(DESTINATION_RADIO_ID, &_radioData, sizeof(_radioData), NRFLite::REQUIRE_ACK); // THE DEFAULT
if (_radio.send(DESTINATION_RADIO_ID, &_radioData, sizeof(_radioData))) // Note how '&' must be placed in front of the variable name.
{
Serial.println("...Success");
}
else
{
Serial.println("...Failed");
_radioData.FailedTxCount++;
}
delay(1000);
}
RX program :
/*
Demonstrates simple RX and TX operation.
Any of the Basic_TX examples can be used as a transmitter.
Please read through 'NRFLite.h' for a description of all the methods available in the library.
Radio Arduino
CE -> 9
CSN -> 10 (Hardware SPI SS)
MOSI -> 11 (Hardware SPI MOSI)
MISO -> 12 (Hardware SPI MISO)
SCK -> 13 (Hardware SPI SCK)
IRQ -> No connection
VCC -> No more than 3.6 volts
GND -> GND
*/
#include <SPI.h>
#include <NRFLite.h>
const static uint8_t RADIO_ID = 0; // Our radio's id. The transmitter will send to this id.
const static uint8_t PIN_RADIO_CE = 9;
const static uint8_t PIN_RADIO_CSN = 10;
struct RadioPacket // Any packet up to 32 bytes can be sent.
{
uint8_t FromRadioId;
uint32_t OnTimeMillis;
uint32_t FailedTxCount;
};
NRFLite _radio;
RadioPacket _radioData;
void setup()
{
Serial.begin(115200);
// By default, 'init' configures the radio to use a 2MBPS bitrate on channel 100 (channels 0-125 are valid).
// Both the RX and TX radios must have the same bitrate and channel to communicate with each other.
// You can run the 'ChannelScanner' example to help select the best channel for your environment.
// You can assign a different bitrate and channel as shown below.
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE250KBPS, 0)
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE1MBPS, 75)
// _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE2MBPS, 100) // THE DEFAULT
if (!_radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN))
{
Serial.println("Cannot communicate with radio");
while (1); // Wait here forever.
}
else {
Serial.println("Yes ! I communicate with radio");
}
}
void loop()
{Serial.println("Je suis dans la boucle mais je n'ai pas de data");
while (_radio.hasData())
{
_radio.readData(&_radioData); // Note how '&' must be placed in front of the variable name.
String msg = "Radio ";
msg += _radioData.FromRadioId;
msg += ", ";
msg += _radioData.OnTimeMillis;
msg += " ms, ";
msg += _radioData.FailedTxCount;
msg += " Failed TX";
Serial.println(msg);
}
}
Thank you for your help