Arduino serial communication many unsigned long

General
1

Hi guys,
I need to send more than 40 unsigned long int (they come from hex color) trough serial com from a Photon to an Arduino Mega, but after 11 unsigned long I start getting errors and 4 ou 5 commas (see In the code bellow) after I don’t receive anything. I seems to happened after 100 chars received.

Any idea of the problem ?

Code of the transmitter (Photon):

unsigned long  var[55] = {
          L1L, L1R,
          L2L, L2R,
          L3L, L3R,
          L4L, L4R,
          L5L, L5R,
          L6L, L6R,
          L7L, L7R,
          L8L, L8R,
          L9L, L9R,
          L10L, L10R,
          BGL1L, BGL1R,
          BGL2L, BGL2R,
          BGL3L, BGL3R,
          BGL4L, BGL4R,
          BGL5L, BGL5R,
          BGL6L, BGL6R,
          BGL7L, BGL7R,
          BGL8L, BGL8R,
          BGL9L, BGL9R,
          BGL10L, BGL10R,
          Mode, Pwr, 
          Rot, RotO, 
          RotT, Rdm, 
          RdmT,Mood, 
          MoodT, MoodS, 
          IndexColorS
        };
        

Serial.println("Sending values to arduino");
Serial1.print("<");
    for(int i = 0; i < 51; i++){
        Serial1.print(var[i]);   
        Serial1.print(",");
        Serial.println(var[i]);
    } 
Serial1.print(">");    
Serial.println("Data sent");

Code of the receiver (Arduino mega):

void recvWithStartEndMarkers() {
  static boolean recvInProgress = false;
  static byte ndx = 0;
  char startMarker = '<';
  char endMarker = '>';
  char rc;

        while (Serial1.available() > 0 && newData == false) {
    rc = Serial1.read();

    if (recvInProgress == true) {
      if (rc != endMarker) {
        receivedChars[ndx] = rc;
        ndx++;
        if (ndx >= numChars) {
          ndx = numChars - 1;
        }
      }
      else {
        receivedChars[ndx] = '\0'; // terminate the string
        recvInProgress = false;
        ndx = 0;
        newData = true;
      }
    }

    else if (rc == startMarker) {
      recvInProgress = true;
    }
  }
}

void parseData() {
if (newData == true) {
    // split the data into its parts

  char * strtokIndx; // this is used by strtok() as an index

  strtokIndx = strtok(receivedChars,",");      // get the first part - the string
  var[0] = atoi(strtokIndx);   // copy it to messageFromPC


  for(int i = 1; i<51; i++) {
  strtokIndx = strtok(NULL, ","); // this continues where the previous call left off
  var[i] = atoi(strtokIndx);     // convert this part to an integer
  }
  for(int i = 0; i<51; i++) {
      Serial.println(var[i]);
      EEPROM.write(i, var[i]);
     }

LL[0] = var[0];
LR[0] = var[1];
LL[1] = var[2];
LR[1] = var[3];
LL[2] = var[4];
LR[2] = var[5];
LL[3] = var[6];
LR[3] = var[7];
LL[4] = var[8];
LR[4] = var[9];
LL[5] = var[10];
LR[5] = var[11];
LL[6] = var[12];
LR[6] = var[13];
LL[7] = var[14];
LR[7] = var[15];
LL[8] = var[16];
LR[8] = var[17];
LL[9] = var[18];
LR[9] = var[19];

BGLL[0] = var[20];
BGLR[0] = var[21];
BGLL[1] = var[22];
BGLR[1] = var[23];
BGLL[2] = var[24];
BGLR[2] = var[25];
BGLL[3] = var[26];
BGLR[3] = var[27];
BGLL[4] = var[28];
BGLR[4] = var[29];
BGLL[5] = var[30];
BGLR[5] = var[31];
BGLL[6] = var[32];
BGLR[6] = var[33];
BGLL[7] = var[34];
BGLR[7] = var[35];
BGLL[8] = var[36];
BGLR[8] = var[37];
BGLL[9] = var[38];
BGLR[9] = var[39];

ActiveMode =  var[40];
power = var[41];
rotation = var[42];
rotation_order = var[43];
rotation_time = var[44];
random_mode = var[45];
mode_time = var[46];
mood = var[47];
mood_type = var[48];
moodSpeed = var[49];
colorIndexSpeed = var[50];

newData = false;

}

Reception test code (Mega):

void setup() {
  Serial.begin(9600);
   Serial1.begin(9600);
  Serial.println("SERIAL: BEGIN");  
}

void loop() {
 if(Serial1.available()){
Serial.println(Serial1.read());
    } 
 }