Ajasra
8/17/2019 - 6:52 AM

VL53L0X distance sensor

Link to description https://learn.adafruit.com/adafruit-vl53l0x-micro-lidar-distance-sensor-breakout/arduino-code

To begin reading sensor data, you will need to install the Adafruit_VL53L0X Library.

Don't forget to remove the protective plastic cover from the sensor before using!

Connecting Multiple Sensors

I2C only allows one address-per-device so you have to make sure each I2C device has a unique address. The default address for the VL53L0X is 0x29 but you can change this in software.

To set the new address you can do it one of two ways. During initialization, instead of calling lox.begin(), call lox.begin(0x30) to set the address to 0x30. Or you can, later, call lox.setAddress(0x30) at any time.

The good news is its easy to change, the annoying part is each other sensor has to be in shutdown. You can shutdown each sensor by wiring up to the XSHUT pin to a microcontroller pin. Then perform something like this pseudo-code:

  • Reset all sensors by setting all of their XSHUT pins low for delay(10), then set all XSHUT high to bring out of reset
  • Keep sensor #1 awake by keeping XSHUT pin high
  • Put all other sensors into shutdown by pulling XSHUT pins low
  • Initialize sensor #1 with lox.begin(new_i2c_address) Pick any number but 0x29 and it must be under 0x7F. Going with 0x30 to 0x3F is probably OK.
  • Keep sensor #1 awake, and now bring sensor #2 out of reset by setting its XSHUT pin high.
  • Initialize sensor #2 with lox.begin(new_i2c_address) Pick any number but 0x29 and whatever you set the first sensor to
  • Repeat for each sensor, turning each one on, setting a unique address. Note you must do this every time you turn on the power, the addresses are not permanent!
VL53L0X.ino
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#include "Adafruit_VL53L0X.h"

Adafruit_VL53L0X lox = Adafruit_VL53L0X();

void setup() {
  Serial.begin(115200);

  // wait until serial port opens for native USB devices
  while (! Serial) {
    delay(1);
  }
  
  Serial.println("Adafruit VL53L0X test");
  if (!lox.begin()) {
    Serial.println(F("Failed to boot VL53L0X"));
    while(1);
  }
  // power 
  Serial.println(F("VL53L0X API Simple Ranging example\n\n")); 
}


void loop() {
  VL53L0X_RangingMeasurementData_t measure;
    
  Serial.print("Reading a measurement... ");
  lox.rangingTest(&measure, false); // pass in 'true' to get debug data printout!

  if (measure.RangeStatus != 4) {  // phase failures have incorrect data
    Serial.print("Distance (mm): "); Serial.println(measure.RangeMilliMeter);
  } else {
    Serial.println(" out of range ");
  }
    
  delay(100);
}