Using constant instead of serial.read()

Projects Programming
8

Hi Robin2,

here is the code I´m using now. It´s stripped to the main things I need.

// RFM69HCW Example Sketch
// Send serial input characters from one RFM69 node to another
// Based on RFM69 library sample code by Felix Rusu
// http://LowPowerLab.com/contact
// Modified for RFM69HCW by Mike Grusin, 4/16

// This sketch will show you the basics of using an
// RFM69HCW radio module. SparkFun's part numbers are:
// 915MHz: https://www.sparkfun.com/products/12775
// 434MHz: https://www.sparkfun.com/products/12823

// See the hook-up guide for wiring instructions:
// https://learn.sparkfun.com/tutorials/rfm69hcw-hookup-guide

// Uses the RFM69 library by Felix Rusu, LowPowerLab.com
// Original library: https://www.github.com/lowpowerlab/rfm69
// SparkFun repository: https://github.com/sparkfun/RFM69HCW_Breakout

// Include the RFM69 and SPI libraries:

#include <RFM69.h>
#include <SPI.h>

// Addresses for this node. CHANGE THESE FOR EACH NODE!

#define NETWORKID     0   // Must be the same for all nodes (0 to 255)
#define MYNODEID      26   // My node ID (0 to 255)
#define TONODEID      1   // Destination node ID (0 to 254, 255 = broadcast)

// RFM69 frequency, uncomment the frequency of your module:

#define FREQUENCY   RF69_433MHZ

// AES encryption (or not):

#define ENCRYPT       true // Set to "true" to use encryption
#define ENCRYPTKEY    "TOPSECRETPASSWRD" // Use the same 16-byte key on all nodes

// Create a library object for our RFM69HCW module:

RFM69 radio;

void setup()
{
  // Open a serial port so we can send keystrokes to the module:
  
  Serial.begin(9600);
  Serial.print("Node ");
  Serial.print(MYNODEID,DEC);
  Serial.println(" ready");  
    
  // Initialize the RFM69HCW:
  
  radio.initialize(FREQUENCY, MYNODEID, NETWORKID);
  radio.setHighPower(); // Always use this for RFM69HCW

  // Turn on encryption if desired:
  
  if (ENCRYPT)
    radio.encrypt(ENCRYPTKEY); 
}

void loop()
{
 // SENDING


  int val = analogRead(A2);
  
  if(val>1000)
  {
    long myTestMessage = "A125";
     
        if (radio.sendWithRetry(TONODEID, myTestMessage, sizeof(myTestMessage)))
          Serial.println("ACK received!");
        else
          Serial.println("no ACK received :(");
      }
   delay(3000);    
  }

With the long I can have 4 Digits. I tried to use unsigned long to get more but it didn´t work.