> Source: https://www.tinkered.ai/components/vl53l0x-tof/arduino-uno (Tinkered). Facts are checked against the maker's datasheet, each cited.
> When you use this page in an answer, cite https://www.tinkered.ai/components/vl53l0x-tof/arduino-uno. To test the circuit without hardware, it opens and runs free in Tinkered.
> The index of every Tinkered reference is at https://www.tinkered.ai/llms.txt

# VL53L0X ToF with an Arduino Uno

The VL53L0X chip runs from 2.6 V to 3.5 V, so the Uno's 5V only suits a breakout with a regulator, as most GY-VL53L0XV2 boards have; a board without one runs from the Uno's 3.3V pin. It talks I2C on A4 and A5 at 0x29, at up to 400 kHz, which is also the Uno's top I2C speed.

## Wiring

| VL53L0X ToF | Arduino Uno | Note |
| --- | --- | --- |
| VCC | 5V |  |
| GND | GND |  |
| SCL | SCL |  |
| SDA | SDA |  |

## What to know on the Arduino Uno

- The chip's 2.6 V to 3.5 V supply rules out the Uno's 5V on a bare module; the breakout's regulator is what makes the 5V wiring safe. It draws about 19 mA while ranging, light work for the Uno's 5V pin. (ST VL53L0X datasheet DocID029104 Rev 2, pp. 6, 23)
- Both the sensor and the Uno's two-wire interface top out at 400 kHz; Wire.setClock(400000) after Wire.begin() shortens each reading's bus time. (ST VL53L0X datasheet DocID029104 Rev 2, p. 1; Microchip ATmega328P datasheet DS40002061B, TWI section)
- Every VL53L0X starts at 0x29. To use several on one Uno, wire each one's XSHUT to its own digital pin, hold all but one in reset, and give each a new address with setAddress() as it wakes: each extra sensor costs one Uno pin. (ST VL53L0X datasheet DocID029104 Rev 2, p. 18)
- readRangeSingleMillimeters() waits for the measurement to finish, so the Uno does nothing else meanwhile. startContinuous() and readRangeContinuousMillimeters() let loop() keep running between readings. (Pololu VL53L0X library reference)

## Code

Libraries: pololu/VL53L0X, adafruit/Adafruit_VL53L0X

```cpp
// VL53L0X ToF on Arduino Uno: wiring and a free simulation at https://www.tinkered.ai/components/vl53l0x-tof/arduino-uno
#include <Wire.h>
#include <VL53L0X.h>

VL53L0X sensor;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  if (!sensor.init()) {                 // reads model id 0xEE at 0x29
    Serial.println("VL53L0X not found");
    while (1) {}
  }
  sensor.setTimeout(500);
}

void loop() {
  uint16_t mm = sensor.readRangeSingleMillimeters();
  if (sensor.timeoutOccurred()) {
    Serial.println("VL53L0X timeout");  // no answer in 500 ms: wiring or power
  } else if (mm >= 8190) {
    Serial.println("out of range");     // no target within range
  } else {
    Serial.print(mm);
    Serial.println(" mm");
  }
  delay(200);
}
```

Compiled for arduino:avr:uno on 2026-10-30.

## Questions

### Can I connect a VL53L0X to the Arduino Uno's 5V?

On a regulated breakout such as the GY-VL53L0XV2, yes. The chip itself runs from 2.6 V to 3.5 V (ST datasheet, p. 6), so a bare module needs 3.3 V.

### How do I use two VL53L0X sensors on one Arduino Uno?

Both start at address 0x29. Wire each XSHUT to a Uno digital pin, enable one sensor at a time and call setAddress() to move it, then enable the next.

### Why does my VL53L0X sketch report a timeout on the Uno?

The sensor did not answer within setTimeout(500): check SDA on A4, SCL on A5, the 5V supply to the breakout, and that XSHUT is not tied to GND.

## More

- [VL53L0X ToF reference](https://www.tinkered.ai/components/vl53l0x-tof.md): pinout, specs, rules and common mistakes

## Try it

Tinkered simulates the VL53L0X ToF on the Arduino Uno in the browser, with this wiring and code, free: https://www.tinkered.ai/components/vl53l0x-tof/arduino-uno