Wireless Visualisation

Hi guys,
So I am working on a project with a toy car
we are going to measure the speed of it and we need to visualize the Sensor Data on the computer or on Smartphone, and the range is between 150-200m.
So is that feasible and what do you recommend.

Definitely feasible. Just have a microprocessor measure the speed and send it over a wireless link to your phone.

WiFi could work but the range is a bit high unless you have more hotspots around that the car can use.