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8051 to control GSM modem
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Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph
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Ajay
Thu Jun 26 2008, 07:29AM
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timers? or any hardware clock for better accuracy...


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Judgement
Thu Jun 26 2008, 06:20PM
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Ajay wrote ...

timers? or any hardware clock for better accuracy...

Hmm..trying not to add any additional hardware.
Its more like a delayed SMS. The user sends the time by SMS for the SMS to be sent by the GSM modem to be delayed. eg.1 hour
And the modem sends an SMS to the sender after 1 hour has passed.
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Judgement
Sun Jun 29 2008, 06:25AM
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Also, how can I program it so that the GSM modem only continues with the program when the correct SMS text is sent?

eg. 1 hour

When the GSM modem receives something else, it will ignore it. Thanks. I need it kind of urgently.
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Shailesh NAYAK
Tue Aug 12 2008, 11:14PM

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You can use this +6512345678 directly as ASCII charachter with AT+CMGS for exmple

AT+CMGS="+6512345678"\r
Best Regards

Shailesh S. NAYAK
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8051 Microcontroller Projects 8051 AVR tutorials PIC microcontroller, 8051 assembly language programming electronics and communication ECE CSE pdf ebooks library BE final year project ideas Embedded systems