Wireless Parking Sensor System


I am attempting to build a parking sensor unit which will measure the distance a vehicle is from an object. I will explain the system and the issues I have encountered.

The system currently comprises of a Sender unit and Receiver unit.

The Sender will house the following:

  • Arduino Uno R3
  • Transmitter (Xbee Series S2B)
  • Ultrasonic Sensor (Maxbotix HRLV-EZ4)

The Receiver will house the following:

  • Arduino Uno R3
  • Transmitter (Xbee Series S2B)
  • Sparkfun Basic 16x2 Character LCD
  • RGB LED (Common Anode) - Added at a future date
  • Latching Switch - Added at a future date

The Sender unit will have an externally positioned Ultrasonic sensor which is connected to an Arduino Uno, the Arduino will then process the measured value and send this to the Xbee (S2B) transmitter (via Serial) and transmit this to the Receiver unit.

The Receiver unit will receive the signal from the Xbee (S2B) Receiver and use the Arduino Uno to send the measured value to be displayed on the 16x2 LCD Display along with some other text. I intend to include an RGB LED and Latching Switch in a future revision of the receiver unit, the LED will change from Green-to-Red to indicate a hazard approaching, while the switch will turn the LCD display on and off.

Currently I have got the system working without the wireless feature present, but when this is added I cannot get the measured value to correctly display on the LCD (this is either unknown values/ unknown characters or just a single value on its one (I know this is from the Serial data coming over one byte at a time).

I have searched the Arduino Forum along with Google but I cannot find anything specifically related to this. Unless I have just totally missed it!!

I would greatly appreciate any help given to get the system functioning as intended.

Many Thanks, GhostGamer