Memory issue on EHS5 | Thales IoT Developer Community

I have a memory problem with EHS5, REVISION 03.001, A-REVISION 00.000.14.

I need to monitor network status periodically, but I observe that on every execution of an AT command the amount of free memory decreases. I have this issue with all commands I've tried (AT+CREG?, AT, ATI, for example).

After some days the free memory becomes dangerously low, although periodically the garbage collector seems to clean some kilobytes.

Furthermore, I've seen that free memory is about 13000000 bytes, but the EHS5 has only 10MB of user memory; can you explain me these numbers, please?

I paste here a code example:

while(true) {
  free = rt.freeMemory();
  serialOut.write(("Free memory: " + free + " - Diff: " + (free-lastFreeMemory) + "\r\n").getBytes());
  lastFreeMemory = free;
  atc.send("AT+CREG?\r");
  System.gc();
  Thread.sleep(5000);
}