ESP8266 Community Forum

Hi everyone,

As I'm on the "Newbie Corner", I dont' need to explain I'm a newbie

I bought ESP8266 WeMoS device and should try to work with "IoT" at home.

I want the ESP8266 discover "new people" at home. I have a house on the field and want that, if someone is close to the house, the device discover this person and send me a message. With the MAC if it is possible... quite easy, eh??

Sorry for my poor english... I'm better "spanish spoker"

Regards

The problem with your idea is that a device of "New people" is a "Client" which don't advertise themselves; only a "Host" does this (if SSID broadcast is enabled, which by default is).

The only way I can think off at the moment (but I'm also still learning, so please correct me if I'm wrong), is to set up a "Fake" open AP (thus without a password) and wait until clients request a connection.
When it tries to connect, make note of its MAC and put it in a list (so you can ignore it the next time) and send you a message that "New people" have arrived.
After that you may do with the connection what you want (drop it, work as a gateway, etc...)

The only problem is that it will only work with clients that have enabled the "Always connect to open AP's"-option (don't know if that's enabled by default on Android, iPhone, etc), so it's not an infallible solution (if there's any, but I'm always open for enlightenment)

Look for radar sensors. Use the output to trigger the ESP.

https://www.limpkin.fr/public/HB100/HB1 ... n_Note.pdf

https://www.youtube.com/watch?v=PV6MZjUAsRY

A Wifi device does actually broadcast its presence while scanning for available Wifi networks so you can use that to detect people carrying a phone with Wifi enabled.

Most devices do active scanning that broadcasts a probe request which includes the devices MAC address. Read more about it in blogs eg here.

There's an ESP8266 example for that which comes with the latest code Arduino/ESP8266 code here.