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Topic: Issues starting up my SIM800L  (Read 106 times) previous topic - next topic

crystalh

My first problem is that when i went through the datasheet of the SIM800l it says it requires a maximum voltage 4.2V. But each time i step down the voltage below 5v, the device does not come on. It only powers when the voltage is 5v. Please what can be the reason for this. I am powering my device using arduino uno.

Secondly, could this be the reason why my sim card does not communicate with GPRS but works with voice calls and sends SMS.

knut_ny

Which module ?
Arduino power may not be sufficient.. 
Ny

crystalh

its a Sim800L and with and an Arduino UNO mega. Please do you know the minimum power expected for the SIM 800L

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