Nrf24l01 receiving random data

Projects Networking, Protocols, and Devices
21

The connection test sketch would have shown that.
It's buried around reply #18.

I used a slightly different variant

// (slightly changed) 18 Mar 2018 - simple program to verify connection between Arduino and nRF24L01+
//  This program does NOT attempt any communication with another nRF24

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

#define CE_PIN   9
#define CSN_PIN 10

const byte thisSlaveAddress[5] = {'R', 'x', 'A', 'A', 'A'};

RF24 radio(CE_PIN, CSN_PIN);

char dataReceived[10]; // this must match dataToSend in the TX
bool newData = false;

void setup() {
  Serial.begin(115200);
  printf_begin();

  Serial.println(F("CheckConnection Starting"));
  Serial.println();
  Serial.println(F("FIRST WITH THE DEFAULT ADDRESSES after power on"));
  Serial.println(F("  Note that RF24 does NOT reset when Arduino resets - only when power is removed"));
  Serial.println(F("  If the numbers are mostly 0x00 or 0xff it means that the Arduino is not"));
  Serial.println(F("     communicating with the nRF24"));
  Serial.println();
  radio.begin();
  radio.printPrettyDetails();
  Serial.println();
  Serial.println();
  Serial.println(F("AND NOW WITH ADDRESS AAAxR  0x41 41 41 78 52   ON P1"));
  Serial.println(F(" and 250KBPS data rate"));
  Serial.println();
  radio.openReadingPipe(1, thisSlaveAddress);
  radio.setDataRate( RF24_250KBPS );
  radio.printPrettyDetails();
  Serial.println();
  Serial.println();
}
void loop() {}

to generate the following output

CheckConnection Starting

FIRST WITH THE DEFAULT ADDRESSES after power on
  Note that RF24 does NOT reset when Arduino resets - only when power is removed
  If the numbers are mostly 0x00 or 0xff it means that the Arduino is not
     communicating with the nRF24

SPI Frequency		= 10 Mhz
Channel			= 76 (~ 2476 MHz)
RF Data Rate		= 1 MBPS
RF Power Amplifier	= PA_MAX
RF Low Noise Amplifier	= Enabled
CRC Length		= 16 bits
Address Length		= 5 bytes
Static Payload Length	= 32 bytes
Auto Retry Delay	= 1500 microseconds
Auto Retry Attempts	= 15 maximum
Packets lost on
    current channel	= 0
Retry attempts made for
    last transmission	= 0
Multicast		= Disabled
Custom ACK Payload	= Disabled
Dynamic Payloads	= Disabled
Auto Acknowledgment	= Enabled
Primary Mode		= TX
TX address		= 0xe7e7e7e7e7
pipe 0 ( open ) bound	= 0xe7e7e7e7e7
pipe 1 ( open ) bound	= 0x4141417852
pipe 2 (closed) bound	= 0xc3
pipe 3 (closed) bound	= 0xc4
pipe 4 (closed) bound	= 0xc5
pipe 5 (closed) bound	= 0xc6


AND NOW WITH ADDRESS AAAxR  0x41 41 41 78 52   ON P1
 and 250KBPS data rate

SPI Frequency		= 10 Mhz
Channel			= 76 (~ 2476 MHz)
RF Data Rate		= 250 KBPS
RF Power Amplifier	= PA_MAX
RF Low Noise Amplifier	= Enabled
CRC Length		= 16 bits
Address Length		= 5 bytes
Static Payload Length	= 32 bytes
Auto Retry Delay	= 1500 microseconds
Auto Retry Attempts	= 15 maximum
Packets lost on
    current channel	= 0
Retry attempts made for
    last transmission	= 0
Multicast		= Disabled
Custom ACK Payload	= Disabled
Dynamic Payloads	= Disabled
Auto Acknowledgment	= Enabled
Primary Mode		= TX
TX address		= 0xe7e7e7e7e7
pipe 0 ( open ) bound	= 0xe7e7e7e7e7
pipe 1 ( open ) bound	= 0x4141417852
pipe 2 (closed) bound	= 0xc3
pipe 3 (closed) bound	= 0xc4
pipe 4 (closed) bound	= 0xc5
pipe 5 (closed) bound	= 0xc6

The layout is better in the serial monitor.

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