In this video, I am testing sim800l modules with with multimeter using 5v power supply. When sim800l connected to the network, then I test the voltages multi-meter and I find to know that voltages are between 4.6v - 4.8v. This is very strange. If you have issue like "Sim800L Not Registering To Network" or "Sim800l Power" then this video may be helpful to you. I am using capacitor (16v 470uf) connecting parallel to the sim800l.
According to the datasheet, it is not recommended to supply 5v dc to the sim800l gsm module. Let's see, I have connected 5v power supply directly to sim800l gsm module and test the voltages using multimeter around sim800l vcc and ground pin.
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Useful Video Links
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SIM800l Powering 5v DC
• SIM800l Powering 5v DC | SIM800L Not ...
SIM800L Blinks 3 Times and Stops
• SIM800L Not Connecting to Network | S...
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Disclaimer
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Disclaimer: All videos are for educational purposes and use them wisely. Any video may have a slight mistake, please take decisions based on your research. This video is not forcing anything on you.
Warning: In some countries it is required to register gsm module from govt authorities before using it. So, get proper understanding of govt laws related to gsm technologies.