I need help with my nRF24L01 PA + LNA module

Projects Programming
1

I'm new to all this Arduino stuff. But I would like to build my own RC car. And I've already watched a few videos and read a lot of websites about how to build and configure one. But I have a problem with the nRF24L01 + PA + NLA component. For some reason it doesn't work.

I'm using two Arduino NANOs and two nRF24L01 + PA + NLA components with two adapters.

Adaptor -> NANO
VVC -> 5V
GND -> GND
CE -> D7
CSN -> D8
SCK -> D13
MO -> D11
MI -> D12

//receiver

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"

// Instantiate RF24 class with CE and CSN values
RF24 radio(7, 8);
// Address to devices comunicate each other (same in both)
const uint64_t pipe = 0xE8E8F0F0E1AA;

void setup() {
  // Setup serial output
  Serial.begin(9600);
  // Start RF
  radio.begin();
  // Setup the channel to work within, number 110
  radio.setChannel(110);
  // Open recept pipe
  radio.openReadingPipe(1, pipe);
  // Start to listen
  radio.startListening();
}

void loop() {
  //just debug, to see if there is a connection
  Serial.print("Available: ");
  Serial.println(radio.available());
  // Wait until some data
  if (radio.available()) {
    // Read payload, and check if it finished
    char txt[32] = "";
    radio.read(&txt, sizeof(txt));
    Serial.println(txt);
  }
  
  // Wait a bit
  delay(100);
}
Output:
Available: 0
Available: 0

//transmitter

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"

// Instantiate RF24 class with CE and CSN values
RF24 radio(7, 8);

// Address to devices comunicate each other (same in both)
const uint64_t pipe = 0xE8E8F0F0E1AA;

// my string i want to send
const char txt[32] = "Hello World!";

void setup() {
  // Setup serial output (debug)
  Serial.begin(9600);
  // Start RF
  radio.begin();
  // Setup the channel to work within, number 110
  radio.setChannel(110);
  // Open wite pipe
  radio.openWritingPipe(pipe);

  radio.stopListening();
}

void loop() {
  //Send message to receiver
  
  radio.write(&txt, sizeof(txt));

  //debug to see if there is a conection (not sure if i can even do that on the transmitter side)
  Serial.print("Available: ");
  Serial.println(radio.available());
  // Wait 2 seconds and repeat
  delay(2000);
}

Output:
Available: 0
Available: 0

Can someone help me?

2

Please describe how you are powering the modules. They will not work if powered from the Nano 3.3 volt pin. Use a pair of AA cells in series to get enough current for the modules to operate. Be sure to connect the module and Nano grounds.

3

The vcc pin is connected to the 5 volts pin on the Arduino Nano. And the Nano is at the moment connected to my computer

4

The vcc pin is connected to the 5 volts pin on the arduino nano. And the nano is at the moment connected to my computer

5

And how do I connect the modules with the cells? So should I still have a connection between the vvc and 5v of the arduino or just the vvc and gnd to the cells?

6

Connecting the nRF devices to 5 volts will likely kill them or the 5 volt regulator on the Nano. The cells go to Vcc and gnd on the module. You need to consider the CURRENT required, as well as the voltage required for the connections.

7

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