Include leading zeros of a 32 bit variable, sent over serial port on Arduino Uno board

Question

i want to send a long variable over the serial port. This code is working as pure C code:

long var = 1000000;
char arr[32];
sprintf(arr,"%.8X",var);
printf("%s",arr);

wich produces the desired output 000F4240

However on the Arduino i cannot get the equivalent code working correctly

long var = 1000000;
char arr[32];
sprintf(arr,"%.8X",var);
Serial.print("%s",arr);

This always results in 00004240, neglecting the MSB and 3rd byte.

Thanks for all your time and help!!!

Answer 1

seems that the arduino's implementation of sprintf only converts in hexadecimal representation only an int number, not a long ... But I'm not sure...

Strange... this question is the inverse