TransWikia.com

nRF24L01+ radio not transmitting anything but says it is

Arduino Asked on December 16, 2021

I have a nRF24L01+ radio that was working like a charm for many months now, and a few days back, I was trying to send something and then receive it. The transmitter initialized properly and said it was transmitting but the receiver got nothing. I made sure all wiring is good, power is sufficient, etc. I made sure the receiver was working with another radio and indeed. So what is wrong. Any help is appreciated.

The transmitter is a high range radio with large antenna and the receiver is the standard PCB antenna ones. When I do printDetails, everything looks fine.

TX Code:

/*
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::BITRATE2MBPS, 100) // THE DEFAULT
    //   _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE1MBPS, 75)
    //   _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE250KBPS, 0)
    
    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.  This retry logic is built into the radio hardware itself, so it is very fast.
    // You can also perform a NO_ACK send that does not request an acknowledgement.  In this situation, the data packet
    // will only be transmitted a single time and there is no verification of delivery.  So NO_ACK sends are suited for
    // situations where performance is more important than reliability.
    //   _radio.send(DESTINATION_RADIO_ID, &_radioData, sizeof(_radioData), NRFLite::REQUIRE_ACK) // THE DEFAULT
    //   _radio.send(DESTINATION_RADIO_ID, &_radioData, sizeof(_radioData), NRFLite::NO_ACK)
    
    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 Code:

/*
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::BITRATE2MBPS, 100) // THE DEFAULT
    //   _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE1MBPS, 75)
    //   _radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN, NRFLite::BITRATE250KBPS, 0)
    
    if (!_radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN))
    {
        Serial.println("Cannot communicate with radio");
        while (1); // Wait here forever.
    }
}

void loop()
{
    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);
    }
}

Add your own answers!

Ask a Question

Get help from others!

© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP