Survey on an efficient model for real time drop box tracking system using WSN

Computer engineering

With technological advances in the telecommunications sector, everything around the world would like to be connected seamlessly anytime, anywhere through the best network. WSN have the potential to become the pervasive sensing technology of the future WDTS is a Smart letter box system where we are going to track whether there is any letter is dropped in the drop box. When somebody drops letter in letter box then LED connected to output stops glowing indicating that you have letter. To detect the presence of a letter we have used a LDR and a source of light which has resistance of about 1 mohm in total darkness and 2-5kohm in bright light. This gives you a visual alarm when somebody drops a letter in drop box. By using Arduino and LDR,It will update the postman or Post office manager regarding, in which letter drop box has letter through our system on Postman Mobile Dashboard by using GPS. So it will save time of postman of unnecessary visiting.This paper provides systematic exploration of existing research and suggest further research direction

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