I have an arduino uno card linked with a shield Sim808 and I want to feed it at the beginning I chose a 9v battery arduino uno card was well fed after I press the button (PWRKEY) so that the LED net flashes but the problem the LED starts flashing but after it goes out gold it must always flash for t…

problem with power shield sim808

enizar May 27, 2018, 12:21am 6

i think the problem is not from the SIM CARD because it work with electricity

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