accoding to the manual
the SD command cannot be used in Micropython. 5% of My modules no longer function after 6 months. ( they cannot read their own IMEI) I was told by Ankur at Digi to not use Airplane mode when putting the module to sleep but instead use "SD" how do I properly put the module to sleep if I cannot use ATSD command? I have been using
x.atcmd('AM', 1) # Airplane mode before sleep
but this does not prevent corruption of the cellular module.
also afterwards I use:
this also does not prevent corruption of the cellular module. In 200 units, 12 have become corrupt within 6 months.