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SIM300C reset/halt problem

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zamroo

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Friends, I design a gsm module with GPRS connectivity. It often problem when data table read and close the server,

1. then some time it become halt until reset the power
2. It reset itself
3. produce bad character on LCD and very late to register.
4. some time it is halt on any one at command state

I am using 5V/3A switch mode adopter power supply.

Plz Help me how i get out from this problem.
 

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