HDB mail notifier device?

[MBBSclinic]

HDB Letter Box notification using GSM and Arduino

pls quote/advise if can do it as per below video or have better setup?

 

[hexanol]

how is it detecting the new letters? For HDB mailboxes, postman would not throw the letter in the slot, they would open up the main mailbox door and throw the letters in. How about multiple letters?

 

[MBBSclinic]

how is it detecting the new letters? For HDB mailboxes, postman would not throw the letter in the slot, they would open up the main mailbox door and throw the letters in. How about multiple letters?

as long slot get new item, device will activate.

 

[wwenze]

I'm thinking of building a locker for delivery man to put stuff inside, complete with online and camera

But then I remember I don't have landed, and police says corridor doesn't count as your property.

 

[hexanol]

motion? Weight?

 

[MBBSclinic]

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