The Over-The-Air-Programming (OTAP) procedure uses the file system to store the new binary image as it is being received.

If you plan on using OTAP, you need to make sure that there is enough free space in the file system to hold a full binary image.

We therefore recommend to:

• keep the size of the full binary image below 200kB
• keep 160kB of free space in the filesystem
• declare non-critical files to be temporary when possible, these files will be deleted when OTAP starts to make more space

This is especially important when you are planning to reduce the size of the file system partition and/or creating files in the file system.