Recently, I'm working on a project about module SIM800L. But I got some serious trouble to get
I use a Li-po battery. In my house, it only needs 3.8V to get 24-25 but in other places the led blink 7 times after 3 seconds, it's mean that the module can't get signal. But I accidentally connect the power supply from the laptop -> Arduino -> SIM800L and it's work. But the voltage is 4.8V while the operating voltage of the chip is from 3.4V to 4.4V.
So I wonder if I can use 4.8V to supply for SIM800L without receiving any damage to my circuit?
Sorry for my English, it's not my nature language.