Wawa:
Shouldn't a SIM800L be powered directly with a single cell LiPo battery.
A 1117 surrely can't supply the ~2Amp transmit current of that module.
Leo..
LiPo batteries will not last 1 year which is my target for the batteries. The device is used just once a week to send sms or email
Maybe I will need a different regulator.
The purpose of using this regulator is to remove the ripple.