A fix for the PWM mode of units shipped prior to January 15, 2015
Problem: Some users have noticed a problem with the PWM read mode of LIDAR-Lite in the 5-6cm range. When an object is in that range it can cause the unit to read a really really really long value that effectively locks up the unit. On Arduino's this produces a "0" value that takes a long time to read.
Software Solution: The software solution for this is to reset the sensor via the PWR_EN line when a zero value is read from the sensor. See details below.
Hardware Solution: If the software solution is not a good fit for your application simply send your unit back to PulsedLight Inc and we'll reprogram it and send it back, please be sure to include a return address.
PulsedLight Inc.
P.O. Box 691
Bend, OR 97709
- Arduino Uno compatible Board
- Arduino IDE (1.0.6 or newer)
- USB Cable
- LIDAR-Lite Sensor made prior to January 15, 2015
Download repository, open with Arduino IDE and upload to Arduino
| LIDAR-Lite Cable | Arduino Pin |
|---|---|
| 5V | 5v |
| PWR_EN | Digital Pin 4 |
| MODE | Connect to 1k ohm resistor and Digital Pin 3 |
| SCL | Unused |
| SDA | Unused |
| GND | GND |
- Connect to Arduino and upload code
- Open the serial monitor (make sure the baud rate is set to 9600)
- The distance will be measured in cm, if a "0" is recieved by the Arduino it will reset the LIDAR-Lite and start reading again (rather than lockup)