Hi, I'm starting work with Digi xbee micro2.4 module interfacing with GSM module and my question is, 1. Can I access any NV memory to store GSM network credential for the xbee module? 2. I tried to configure GSM credential using file access by write and read text file, but here I have to remove the file before writing. Is there any suggestion write to file with append mode evey time can you kindly with these. Finally if there any micro pyton script let me know.