sim900a restarting frequently

[cheenu02]

hi,
I am using using SIM900a to send sms in my project.It was worked fine till yesterday.The problem is it is restarting continuously from today morning onwards.The output is like this



RDY

+CFUN: 1

+CPIN: READY

Call Ready

RDY

+CFUN: 1

+CPIN: READY

Call Ready

RDY

+CFUN: 1

+CPIN: READY


please help me

 

[elex101]

Can you share your schematic.

 

[sukumar]

Check the input voltage to the module. It must be atleast 4.1.

 

[nandhu015]

Commonly it happens when the supply voltage drops below the brown out level of the module.

Increase the supply current (the power supply should able to supply around 1.5Amps for a short period)