Externally control I/O pin

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psrkiran

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My project is SMS based device control in this i'm able to control devices through relays but when a person is at home he must be able to control the devices manually (through switch), when switch is turned off the state should be reflected to remote user (SMS sender)
Is this possible ??
 

Yes, You can use switches connected to microcontroller directly to control the devices.

On change of any output you have to send a sms to the remote user
 
nandhu015 said:
Yes, You can use switches connected to microcontroller directly to control the devices.

On change of any output you have to send a sms to the remote user
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Thanks for the reply

For the same pin can i connect both switch and the relay ?
if so please provide details
 

As i told earlier you have to connect the switches to microcontroller free pins, and not to the output pins or relay
 
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