How to Use Garmin LIDAR-Lite v4: Examples, Pinouts, and Specs

The Garmin LIDAR-Lite v4 (Part ID: 010-02022-00) is a compact and lightweight laser rangefinder designed for accurate distance measurements using LIDAR (Light Detection and Ranging) technology. This versatile sensor is ideal for applications such as robotics, drones, automation, and other systems requiring precise distance sensing. Its small form factor and low power consumption make it suitable for both hobbyist and professional projects.

• Obstacle detection and avoidance in robotics and drones
• Terrain mapping and navigation
• Industrial automation and object detection
• Distance measurement in IoT devices
• Educational and research projects

The following table outlines the key technical specifications of the Garmin LIDAR-Lite v4:

The Garmin LIDAR-Lite v4 features a 6-pin connector for interfacing. The pin configuration is as follows:

1. Power Supply: Connect the +5V pin to a 5V power source and the GND pin to ground.
2. Interface Selection: Use the MODE pin to select the desired interface:
   • Leave the MODE pin unconnected for I2C communication.
   • Connect the MODE pin to ground for PWM output.
3. I2C Communication:
   • Connect the I2C_SCL pin to the SCL pin of your microcontroller.
   • Connect the I2C_SDA pin to the SDA pin of your microcontroller.
4. PWM Output:
   • Connect the PWM_OUT pin to a digital input pin on your microcontroller to read distance measurements.

• Ensure the power supply voltage is within the specified range (4.75 V to 5.5 V).
• Avoid exposing the sensor to direct sunlight or reflective surfaces, as this may affect accuracy.
• Use pull-up resistors (typically 4.7 kΩ) on the I2C lines if your microcontroller does not have internal pull-ups.
• Mount the sensor securely to minimize vibrations, which can interfere with measurements.

Below is an example Arduino sketch to interface the LIDAR-Lite v4 using I2C:

#include <Wire.h> // Include the Wire library for I2C communication

#define LIDAR_ADDRESS 0x62 // Default I2C address for LIDAR-Lite v4
#define MEASURE_REGISTER 0x00 // Register to initiate measurement
#define DISTANCE_REGISTER 0x10 // Register to read distance

void setup() {
  Wire.begin(); // Initialize I2C communication
  Serial.begin(9600); // Start serial communication for debugging
  Serial.println("LIDAR-Lite v4 Initialization...");
}

void loop() {
  // Initiate a measurement
  Wire.beginTransmission(LIDAR_ADDRESS);
  Wire.write(MEASURE_REGISTER); // Write to the measurement register
  Wire.write(0x04); // Command to start measurement
  Wire.endTransmission();

  delay(20); // Wait for measurement to complete

  // Read the distance value
  Wire.beginTransmission(LIDAR_ADDRESS);
  Wire.write(DISTANCE_REGISTER); // Set register pointer to distance register
  Wire.endTransmission(false); // Restart I2C communication

  Wire.requestFrom(LIDAR_ADDRESS, 2); // Request 2 bytes of data
  if (Wire.available() == 2) {
    uint16_t distance = Wire.read() << 8; // Read high byte
    distance |= Wire.read(); // Read low byte
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
  }

  delay(100); // Delay before the next measurement
}

• Ensure the LIDAR-Lite v4 is connected to the correct I2C pins on the Arduino UNO (A4 for SDA and A5 for SCL).
• Use a logic level shifter if your microcontroller operates at 3.3V logic levels.

1. No Response from the Sensor:

   • Verify the power supply voltage and connections.
   • Check the I2C address (default is 0x62) and ensure no address conflicts.
   • Ensure pull-up resistors are present on the I2C lines.

2. Inaccurate Measurements:

   • Avoid reflective or transparent surfaces in the sensor's field of view.
   • Ensure the sensor is mounted securely to reduce vibrations.

3. PWM Output Not Working:

   • Confirm the MODE pin is connected to ground.
   • Verify the microcontroller's digital input pin configuration.

Q: Can the LIDAR-Lite v4 measure distances beyond 10 meters?
A: No, the maximum measurement range is 10 meters. For longer ranges, consider other LIDAR models.

Q: Is the sensor compatible with 3.3V microcontrollers?
A: Yes, but you must use a logic level shifter for the I2C lines to avoid damaging the sensor.

Q: How can I reduce measurement noise?
A: Use averaging techniques in your code and ensure the sensor is not exposed to excessive vibrations or environmental interference.

Q: Can I use multiple LIDAR-Lite v4 sensors on the same I2C bus?
A: Yes, but you must configure each sensor with a unique I2C address. Refer to the sensor's datasheet for instructions on changing the address.