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Home / Sensors / GY-US42 Ultrasonic Distance Measurement Sensor Module, Compatible with MB1242/SRF02
Sensors

Attributes

Brand -
Category Robotics / STEM Teaching Tools / Sensors
Origin -
Operating Voltage 3.3V - 5.5V DC
Measurement Range 20 cm to 700 cm
Interface Type I2C, PWM, Serial (UART)
Beam Angle Approx. 15 degrees
Resolution 1 cm
Dimensions 44mm x 20mm x 15mm
Weight 8 grams
Compatibility MB1242, SRF02, Arduino, Raspberry Pi
Operating Temperature -20°C to +70°C
Package Contents 1x GY-US42 Sensor Module, 1x Pin Header

6 reviews

A

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for robotics projects

This sensor works flawlessly with my Arduino robot. The I2C interface is very easy to implement, and the readings are stable even in varying light conditions.

A

Anonymous

Mar 21, 2026

Rating: 5/5

Compact and reliable

Used this for altitude hold on a small DIY drone. It's lightweight and the response time is quick enough for basic stabilization tasks.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Excellent replacement part

Bought this to replace a faulty SRF02 in an old project. Pinout is compatible and it required zero changes to my existing code. Saved my project!

A

Anonymous

Mar 19, 2026

Rating: 4/5

Good value but needs calibration

Great little module for the price. I had to do a bit of software calibration to get the distances spot-on, but once set up, it performs reliably.

A

Anonymous

Mar 06, 2026

Rating: 4/5

Solid performance indoors

Works great for indoor automation tasks. Note that soft surfaces like fabric can sometimes absorb the ultrasonic waves, leading to occasional missed readings.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Easy to use for beginners

I found plenty of libraries online that support this specific model. Got it working within an hour of unboxing. Highly recommended for students.

5 FAQ

Q: Does this come with jumper wires included?

A: The package includes the sensor module and a pin header strip. Jumper wires are not included but are standard components available separately.

Q: How does it perform in direct sunlight?

A: Ultrasonic sensors generally perform well in sunlight as they do not rely on light. However, extreme heat or strong wind outdoors can occasionally affect sound wave propagation and accuracy.

Q: Can this sensor be used directly with a 3.3V microcontroller?

A: Yes, the GY-US42 operates on a voltage range of 3.3V to 5.5V, making it fully compatible with 3.3V logic systems without needing a level shifter.

Q: Is there a library available for Python/Raspberry Pi?

A: Yes, since it supports I2C and UART, you can use standard Python libraries like smbus or pySerial. There are also several community-maintained GitHub repositories specifically for the GY-US42.

Q: What is the maximum update rate for distance measurements?

A: The sensor can provide updates at approximately 20Hz, though this may vary slightly depending on the interface mode (PWM vs Serial) and the distance to the target.

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