Communication multiple NRF24 not sending data

Smitty12 · November 25, 2024, 8:08pm

Hello,

This is my first project with NRF24.
I am trying to measure at different spots the temperture. The data needs to be stored on a SD card and using a LCD display to show the tempertures I cut the project in 3 pieces. I am using 5 nodes (5 pro mini with DHT22) for sending all the data to node 00. This is working fine. I want to use a node 011 (mini with LCD) for displaying the data. At the moment, the data to node 011 is not recieved. Node 01 is running.

When I disconnect node 05 for measuring temperture and use node 05 for sending the data to, it works perfectly.

Can you please tell me what i am missing. Already a few days finding out where the problem could be.

Thanks for the reply,

Cheers,

node 00

// pin Lay out
// ----------------------
// pin 2 LED green
// pin 3 LED red
// pin 4 CS SD card
// pin 8 CSN nrf24
// pin 9 CE  nrf24
// pin 11 MOSI SD, MOSI NRF24
// pin 12 MISO SD, MISO NRF24
// pin 13 CLK  SD, CLK  NRF24 
// A4, A5 DS3231

//   1         2      3       4       5       6
// bmp280    DHT22   DHT2   FC37    bmp280   teller
// luchtdruk vochtig temp   regen   temp     teller

//nrf2401 receiver
#include <SPI.h>
#include <Wire.h>
#include <RF24.h>
#include <RF24Network.h>


// Define Radio Pins
#define CE_PIN  9
#define CSN_PIN 8

// Create RF24 and RF24Network objects
RF24 radio(CE_PIN, CSN_PIN);
RF24Network network(radio);

// Define Node Addresses

const uint16_t MASTER_NODE = 011 ;  // Node address of the receiver
const uint16_t SENDER_NODE = 00; // Node address of the sender

#include <SD.h>                        
File myFile; // CS op pin 4 

#include <DS3231.h>
DS3231  rtc(SDA, SCL);

const byte greenLED = 2; 
const byte redLED = 3; 

float data[6];
float recdata[6];

/////////////////////////////////////////////////////////////////////
void setup()
{
  Serial.begin(9600); 
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  Serial.println("Starting");
  if (!radio.begin()) {
    Serial.println(F("radio hardware is not responding!!"));
    while (1) {
      digitalWrite(4, HIGH);   // turn the LED on (HIGH is the voltage level)
      delay(100);                       // wait for a second
      digitalWrite(4, LOW);    // turn the LED off by making the voltage LOW
      delay(100);
    }  // hold in infinite loop
  }
  network.begin(90, SENDER_NODE);  // Start the network with node address 1
  //radio.setDataRate(RF24_2MBPS); deze gaf problemen en werkt het zenden niet meer
  
  radio.setPALevel(RF24_PA_LOW);
  Serial.println(F("radio hardware is responding!!"));

  
  Serial.println("Initializing SD card...");
  if (!SD.begin(4)) {
      while (1) {
      digitalWrite(redLED, HIGH);   // turn the LED on (HIGH is the voltage level)
      delay(1000);                       // wait for a second
      digitalWrite(redLED, LOW);    // turn the LED off by making the voltage LOW
      delay(2000);
    }
  }
  rtc.begin();
  digitalWrite(redLED, HIGH);  
  delay(500);                       
  digitalWrite(redLED, LOW);  
  delay(500);
  digitalWrite(redLED, HIGH);   
  delay(500);                      
  digitalWrite(redLED, LOW);  
  delay(500);
  digitalWrite(redLED, HIGH);
  delay(500);            
  digitalWrite(redLED, LOW);

  Serial.println("end setup");
}

//---------------------------------------------------------------------------------------------------
void loop()
{ 
  digitalWrite(greenLED, LOW);
  network.update();  // Check for incoming messages

  // Check if we received a message
  RF24NetworkHeader header;
  
  if (network.available()) {
    network.read(header, &data, sizeof(data));  // Read the incoming message

   RF24NetworkHeader header(MASTER_NODE);
   network.write(header, &data, sizeof(data));

    // Print received data
    //Serial.println("Received data:");
    recdata[0] = data[0],0;
    recdata[1] = data[1],0;
    recdata[2] = data[2],1;
    recdata[3] = data[3];
    recdata[4] = data[4];
    recdata[5] = data[5],0;

   
    

    screen();
     delay(50);
     digitalWrite(greenLED, HIGH);
     datawriting();     
   }   
}

//----------------------------------------------------------store data on the SD card
void datawriting(){
  int y=0; // teller
  char *place[] = {"huiskam.csv", "overloop.csv", "achterpl.csv", "badkamer.csv","keuken.csv" };
  if (recdata[0] == 10010) {
    Serial.println("huiskam");
     myFile = SD.open(place[0], FILE_WRITE);
  }                      
  if (recdata[0] == 10020) {
    Serial.println("overloop");
     myFile = SD.open(place[1], FILE_WRITE);
  }
  if (recdata[0] == 10030) {
    Serial.println("achterpl");
     myFile = SD.open(place[2], FILE_WRITE);
  }
  if (recdata[0] == 10040) {
    Serial.println("badkamer");
     myFile = SD.open(place[3], FILE_WRITE);
  }
  if (recdata[0] == 10050) {
    Serial.println("keuken");
     myFile = SD.open(place[4], FILE_WRITE);
  }
  Serial.println("start data writing");

   /*
  if (myFile) {
    y=y+1;
    myFile.print(rtc.getDateStr());
    myFile.print(";");
    myFile.print(rtc.getTimeStr());
    myFile.print(";");
    myFile.print(data[0]);
    myFile.print(";");
    myFile.print(data[1]);
    myFile.print(";");
    myFile.print(data[2]);
    myFile.print(";");
    myFile.print(data[3]);
    myFile.print(";");
    myFile.print(data[4]);
    myFile.print(";");
    myFile.print(data[5]);
    myFile.print(";");
    myFile.print(y);
    myFile.println(";");
  }
  */
  myFile.close();

  delay(500);
  digitalWrite(greenLED, LOW);
  Serial.println("end data writing");
  delay(500);
  Serial.println(" ");
}

void screen(){
     Serial.print(rtc.getDateStr()); Serial.print("\t");
     Serial.print(rtc.getTimeStr()); Serial.print("\t");
     Serial.print(data[0],0); Serial.print("\t");
     Serial.print(data[1],0); Serial.print("\t");
     Serial.print(data[2],1); Serial.print("\t");
     Serial.print(data[3],1); Serial.print("\t");
     Serial.print(data[4],1); Serial.print("\t");
     Serial.println(data[5],0);
     //Serial.println(" ");
}

node 011

// pin Lay out
// ----------------------
// pin 2 LED green
// pin 3 LED red
// pin 4 CS SD card
// pin 8 CSN nrf24
// pin 9 CE  nrf24
// pin 11 MOSI SD, MOSI NRF24
// pin 12 MISO SD, MISO NRF24
// pin 13 CLK  SD, CLK  NRF24 
// A4, A5 DS3231

//   1         2      3       4       5       6
// bmp280    DHT22   DHT2   FC37    bmp280   teller
// luchtdruk vochtig temp   regen   temp     teller

//nrf2401 receiver
#include <SPI.h>
#include <Wire.h>
#include <RF24.h>
#include <RF24Network.h>

// Define Radio Pins
#define CE_PIN  9
#define CSN_PIN 8

// Create RF24 and RF24Network objects
RF24 radio(CE_PIN, CSN_PIN);
RF24Network network(radio);

// Define Node Addresses

const uint16_t MASTER_NODE = 00 ;  // Node address of the receiver
const uint16_t SENDER_NODE = 011; // Node address of the sender

#include <DS3231.h>
DS3231  rtc(SDA, SCL);

const byte greenLED = 2; 
const byte redLED = 3; 

float data[6];
float recdata[6];

/////////////////////////////////////////////////////////////////////
void setup()
{
  Serial.begin(9600); 
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  Serial.println("Starting");
  if (!radio.begin()) {
    Serial.println(F("radio hardware is not responding!!"));
    while (1) {
      digitalWrite(4, HIGH);   // turn the LED on (HIGH is the voltage level)
      delay(100);                       // wait for a second
      digitalWrite(4, LOW);    // turn the LED off by making the voltage LOW
      delay(100);
    }  // hold in infinite loop
  }
  network.begin(90, SENDER_NODE);  // Start the network with node address 1
  //radio.setDataRate(RF24_2MBPS); deze gaf problemen en werkt het zenden niet meer
  
  radio.setPALevel(RF24_PA_LOW);
  Serial.println(F("radio hardware is responding!!"));
 
  
  //rtc.begin();
  digitalWrite(redLED, HIGH);  
  delay(500);                       
  digitalWrite(redLED, LOW);  
  delay(500);
  digitalWrite(redLED, HIGH);   
  delay(500);                      
  digitalWrite(redLED, LOW);  
  delay(500);
  digitalWrite(redLED, HIGH);
  delay(500);            
  digitalWrite(redLED, LOW);

  Serial.println("end setup");
}

//---------------------------------------------------------------------------------------------------
void loop()
{ 
  digitalWrite(greenLED, LOW);
  network.update();  // Check for incoming messages

  // Check if we received a message
  RF24NetworkHeader header;
  
  if (network.available()) {
    network.read(header, &data, sizeof(data));  // Read the incoming message

    // Print received data
    //Serial.println("Received data:");
    recdata[0] = data[0],0;
    recdata[1] = data[1],0;
    recdata[2] = data[2],1;
    recdata[3] = data[3];
    recdata[4] = data[4];
    recdata[5] = data[5],0;

    screen();
    delay(50);
    
  }   
}


void screen (){/*
  //Serial.println("node  vochtigh.  temp          spare  spare   teller");
    Serial.print(recdata[0],0); 
    Serial.print("\t");
    Serial.print(recdata[1],0);
    Serial.print("%");
    Serial.print(" ");
    Serial.print("\t");
    Serial.print(recdata[2],1);
    Serial.print(" ");
    Serial.write(0xC2);
    Serial.write(0xB0);
    Serial.print("C  ");
    Serial.print("\t");
    Serial.print(recdata[3],0);
    Serial.print("\t");
    Serial.print(recdata[4],0);
    Serial.print("\t");
    Serial.println(recdata[5],0);
    Serial.println();
*/
     //Serial.print(rtc.getDateStr()); Serial.print("\t");
     //Serial.print(rtc.getTimeStr()); Serial.print("\t");
     Serial.print(data[0],1); Serial.print("\t");
     Serial.print(data[1],1); Serial.print("\t");
     Serial.print(data[2],1); Serial.print("\t");
     Serial.print(data[3],1); Serial.print("\t");
     Serial.print(data[4],1); Serial.print("\t");
     Serial.println(data[5],1);
}

node 01

// pin lay out
//
// pin 2 cs DHT22

// pin 4 LED 
// pin 8 CSN nrf24
// pin 9 CE  nrf24
// pin 11 MOSI NRF24
// pin 12 MISO NRF24
// pin 13 CLK  NRF24

//   1         2            3        4       5       6
//  node      DHT22       DHT22    spare   spare   teller
//   nr    vochtigheid    temp                     teller

#include <SPI.h>
#include <Wire.h>
#include <RF24.h>
#include <RF24Network.h>

// Define Radio Pins
#define CE_PIN  9
#define CSN_PIN 8

// Create RF24 and RF24Network objects
RF24 radio(CE_PIN, CSN_PIN);
RF24Network network(radio);

// Define Node Addresses
const uint16_t MASTER_NODE = 00 ;  // Node address of the receiver
const uint16_t SENDER_NODE = 01; // Node address of the sender

#include "DHT.h"
#define DHTPIN1 2
#define DHTTYPE1 DHT22   

DHT dht1(DHTPIN1, DHTTYPE1);

float hum1 = 0;      //  
float tempdht1 = 0; 
float cortemp1 = -0.3 ;// +0.2
float corhum1 = -1.1 ; // 0.0

float teller = 0.0;

// Define the size of the float array

float data[6] ;  // Example float array


void setup() {
  Serial.begin(9600);
  if (!radio.begin()) {
    Serial.println(F("radio hardware is not responding!!"));
    while (1) {
      digitalWrite(4, HIGH);   // turn the LED on (HIGH is the voltage level)
      delay(100);                       // wait for a second
      digitalWrite(4, LOW);    // turn the LED off by making the voltage LOW
      delay(100);
    }  // hold in infinite loop
  }

  network.begin(90, SENDER_NODE);  // Start the network with node address 1
  //radio.setDataRate(RF24_2MBPS); deze gaf problemen en werkt het zenden niet meer
  dht1.begin();

  radio.setPALevel(RF24_PA_LOW);
  Serial.println(F("radio hardware is responding!!"));
  Serial.println(" "); 
  Serial.println("node   vocht     temp         niets   niets   teller"); 
  Serial.println(" "); 

  digitalWrite(4, HIGH); 
  delay(100);       
  digitalWrite(4, LOW);   
  delay(100);
  digitalWrite(4, HIGH); 
  delay(100);       
  digitalWrite(4, LOW);   
  delay(100);
  digitalWrite(4, HIGH); 
  delay(100);       
  digitalWrite(4, LOW);   
  delay(1000);

}

void loop() {

  hum1 = dht1.readHumidity();
  tempdht1 = dht1.readTemperature();
  
  data[0] = 10010;  // node adress
  data[1] = hum1 + corhum1;
  data[2] = tempdht1 + cortemp1;
  data[3] = 0;
  data[4] = 0;
  data[5] = teller;

    // Send the data to the receiver node
  RF24NetworkHeader header(MASTER_NODE);
  network.write(header, &data, sizeof(data));

  //----- display on local monitor: ------------
  Serial.print(data[0],0);
  Serial.print(" "); 
  Serial.print("\t");

  Serial.print(data[1],0);
  Serial.print("%");
  Serial.print(" "); 
  
  Serial.print("\t");

  Serial.print(data[2],1);
  Serial.print(" "); 
  Serial.write(0xC2);  //send degree symbol
  Serial.write(0xB0);  //send degree symbol
  Serial.print("C   ");
  Serial.print("\t");

  Serial.print(data[3],0);
  Serial.print(" ");
  Serial.print("\t");

  Serial.print(data[4],0);
  Serial.print("\t");

  Serial.print(data[5],0);
  Serial.println("\t");
  
  delay(1000);
  digitalWrite(4, HIGH);
  delay(2000);  // was 8000 
  digitalWrite(4, LOW);
  delay(7000);  //elke  5 minuten een data was 290000
  
  teller=teller+1;
}

TMRh20 · November 25, 2024, 11:02pm

You just need to call network.update() in the loop on node 01. You may need to remove the delays and switch to a millis() approach in order to keep the network updated/handle routing.

Smitty12 · November 26, 2024, 7:17pm

Hello TMRh20,

Thanks for your response!
I followed your remarks and it is working great now.
What i do not understand is, if i want to send data from node 00 to node04 then it is also working without the network.update();

TMRh20 · November 26, 2024, 10:37pm

I don't quite understand that either, it shouldn't work without calling network.update().

The write() function does call network.update() in some cases while sending data, so it could be that. You should still be calling update() regularly for optimal performance though.

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