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GSM S modem restarted when load is Turn ON/OFF manually?

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N.Karthick

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Hi friends,

i'm doing a project is used to control our pump motors which is used for agriculture, i completed everything in my project.

small intro about my project: It's fully gsm based pump control, i'm using sim900a module , pic18f4520 controller, ds1307,etc

power supply details.
transformer 240v/12v-2A
gsm i/p is 4.13v,

we can turn on/off the pump by manually or by using gsm(call/sms),

motor will turn off , manually,using mobile phones(call/sms), dryrun pff,overload off,

my circuit connection is attached with this post,

my question is when i turn the pump through mobile 100% working,but when turn i manually modem will reset the network registration,for few miceoseconds. connection.png
gsm connection diagram,


pls any give the solution for me
 

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  • 0900_Schema.bmp
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