Sim800l does not work (power supply problem)

vittorioexp / Sim800L-Arduino-Library-revised

The SIM800L Arduino Library is a simple and easy-to-use library for the SIM800L module, allowing for quick and efficient communication with the module using the Arduino platform.

GNU General Public License v3.0

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Sim800l does not work (power supply problem) #15

Closed vonhuhieunghia closed 1 year ago

vonhuhieunghia commented 5 years ago

I've connected my arduino nano to sim800l in a correct order but the LED on sim800l didn't turn on, and also the sim800l was heated a little. (I used a 12V-15A power source with a Module LM2596 to lower the voltage) Please help me, thank you

Byt3x commented 4 years ago

The Sim800l needs 3.4-4.4 volts, otherwise it won't work