First time user and poster.
Im needing some help and hoping you will be kind enough to provide me with some support.
A bit of background to what Im trying to achieve, We are about to open a new carwash which we would like to have a sensor that detects when a car is in the tunnel for its wash and provides information to the driver who is driving through the tunnel... for example before the car enters the tunnel we want to have information such as ensure antennas are down and windows are up. Then when the car drives over the sensor another screen appears showing please wait, keep engine running etc, once the car is off the sensor the screen reverts back to the first screen for the driver.
I will need a waterproof ultrasonic sensor like this http://www.ebay.com.au/itm/1Pcs-Waterproof-Ultrasonic-Module-Distance-Measuring-Sensor-for-Arduino-TE501-/331876257628?hash=item4d455dcf5c:g:qHoAAOSwvg9XV~oi and A computer running powerpoint with the Arduino plugged into the computer.
What I would like to achieve is that when there is no car over the sensor it will show the first slide and when the car is over the sensor the second slide appears.
What do I need to achieve this? What version of Arduino should I get, What coding do I need? (I'm assuming a keyboard code that would be a left and right arrow is enough?) If someone could show me where I can find this coding? How does the unit communicate with the computer as an input device?
If you could help me that would be amazing! It is something we are needing sooner than later and appreciate the help and support you can provide.