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I am new for this forum. I need some help to do my final final year project.
I am doing an automatic meter reading system for Electricity meters by GSM network by sending SMS. The important functionalities are; - sending sms through GSM network - Have to maintain common timing for all the people
So that i thought to use the GSM module for send SMS and GPS time for the timing requirement. I need to produce a low cost unit ultimately. I selected SIM548C since it has both GSM+GPS module. Is that selection is OK???
If not can you pls suggest a module for this requirement? But i need to be low cost. And also can you please suggest me what microcontrller i can use for this SIM548C?
Please help me. Your help will be very useful to me. thank you in advance.
No.
You told us this is a final-year college project; the goal of a final-year college project is to demonstrate that you can apply what you've learned during the course.
Of course, in your final Project Report, you could consider what would be required to take the concept into large-scale, low-cost volume production...
"... the expected cost of final product have to be around 25USD"
The only way you will achieve that kind of price-point is by manufacturing in huge volumes - clearly, you just can't do that in a final-year project!
"if I can't asure that I can get time from GSM network providers, what can do for my timing requirement?"
For a commercial project being deployed in huge volumes, you could try to negotiate with a network provider - but, again, that won't work with a final-year project.
There are many time-reference broadcasts around the world; eg, "MSF" in the UK: en.wikipedia.org/.../Time_from_NPL
BTW: on a per-byte basis, SMS does not (usually) work out as a "low-cost" channel...