Human detection sensor in Raspberry pi

[sanaaa]

Hi,
I'm doing my first Raspberry pi project in which I'm counting number of customers coming into the shop. Other scenario is that whenever a customer come close to Ad screen in the shop the screen will show some particular As e.g daily deals, ongoing sales etc. For counting customers I'm using PIR sensor but I´m not sure what kind of proximity sensor i should use for other scenario.
Really looking forward for your suggestions

[topguy]

Accurate people counting is a billion dollar industry. Many different methods are in use, from laser curtains to A.I driven cameras.

An ultrasonic distance sensor might be a suitable cheap solution,you mount it in the ceiling looking down and hopefully it will register "heads" passing underneath it. If the entrance area to your shop is large you might need multiple sensors, and of course the sensor cant really tell you if people is coming or going.

[PiGraham]

Hi,
I'm doing my first Raspberry pi project in which I'm counting number of customers coming into the shop.

That's a bit ambitious for a first project. Why not try some simpler projects to get to know the Pi?