This repository contains sample code demonstrating how to zero the LIDAR-Lite unit. LIDAR-Lite is not "zeroed" at the factory but we have a register (0x13) for zeroing the unit. If you want to offset the readings simply write a calibration offset value to 0x13.
The calibration offset is a two's compliment.
For postive offset... i.e. to add a constant to the distance output... simply convert the decimal number to hex.
- Example... if i want to add 5 to all distance readings... the CalibrationOffsetValue would be 0x05
For negative offset... i.e. to subtract a constant from the distance output, you need to subtract the value from 256 and convert that to hex.
- Example 1... if i want to remove 5 from all distance readings: 256-5 = 251 so the CalibrationOffsetValue would be 0xFB.
- Example 2... if i want to remove 12 from all distance readings: 256-12 = 244 so the CalibrationOffsetValue would be 0xF4
Use this page to get the hex values: http://www.cs.princeton.edu/courses/archive/fall07/cos109/bc.html
- Arduino Uno compatible Board
- Arduino IDE (1.0.6 or newer)
- USB Cable
- LIDAR-Lite Sensor
- The 'Arduino I2C Master Library' from DSS Circuits: http://www.dsscircuits.com/index.php/articles/66-arduino-i2c-master-library
- Download Repository and open with Arduino IDE
- Install DSS "Arduino I2C Master Library" - Information about installing libraries can be found:
http://arduino.cc/en/Guide/Libraries
| LIDARLite Cable | Arduino Pins |
|---|---|
| 5V | 5V |
| PWR EN | (Unused) |
| MODE | (Unused) |
| SCL | SCL (topmost pin on the right hand side of Arduino) |
| SDA | SDA (second pin from the top on the right hand side of Arduino) |
| GND | GND |