Hello , i want to make keyless entry system using two esp8266 module with its wifi capabilities.
Is it possible to make a keyfob using esp32. When this keyfob(esp32) comes near to the another esp32(lock) than this lock operates a relay/electronic lock.
Is it possible?
It’s possible , but these are wi fi modules , so you would need to wait for your fob to connect to the network and use , say a magnet and Reed switch to show the fob is next to the lock , then some code to validate and unlock . A simple Rf module , such as RF69 might be better .
Packaging is always an issue .
But … you can buy car remote fobs and receivers cheaply on eBay , which work !!
Tell your house insurance about such locks ( they may not like it )
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Possible, yes - but probably not a great idea.
Why do you want to have an ESP32 in the fob?
Why not just use RFID/NFC? That'll give you a far simpler & cheaper fob ...
how are you going to define "near"?
With RFID/NFC, it's part of the technology; but much harder to do with WiFi (or Bluetooth).
And you've heard all the problems with keyless entry on cars - where criminals manage to "spoof" the signal and gain entry (it's a "man-in-the-middle" attack) ... ?
Would you? 
Don't they support peer-to-peer - ie, without a "network"?
Never tried this, so no idea, sorry.
Just googled and got this so guess you can !
(not sure about it being magic tho lol)
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