# Pixhawk Ultrasonic Module, Time of Flight, GY-US42, I2C, TTL, PWM, 3-5V

> GY-US42 ultrasonic module for Pixhawk, Arduino and other boards, calculates distance using time of flight. Measurement range 20-720 cm, resolution 1 cm, response frequency 15 Hz. Supply voltage 3-5 V, current draw 9 mA. Communication via I2C (default address 0x70), TTL UART (9600-115200bps) or PWM, selectable via jumper. I2C modes: Direct, Pixhawk, APM.

- Page: https://sigmanortec.ro/en/pixhawk-ultrasonic-module-time-of-flight-gy-us42-i2c-ttl-pwm-3-5v
- Price: 72.18 RON
- Availability: In stock; 1-2 zile
- Reference: 9572 · EAN: 5946195117497
- Category: Mechatronics and IoT > Sensors and Modules > Distance and Presence Sensors
- Specifications: Supply Voltage: 3; Maximum Input Voltage: 5; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.008 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 06:34 (Europe/Bucharest)

## Description

Ultrasonic distance measurement module for Pixhawk, Arduino and other boards, calculates distance by time of flight and provides stable readings between 20 and 720 cm, with 1 cm resolution and fast response up to 15 Hz. Operates at 3-5 V, low consumption 9 mA, flexible communication on I2C, TTL UART or PWM, default I2C address 0x70.
The ultrasonic distance measurement module, compatible with Arduino and other development boards, which works with voltages between 3 and 5VDC.
It works on the principle of ultrasounds, the emitter emitting ultrasounds, which hit an object and are reflected back, so that the receiver can then detect them. The distance measurement is performed by the module measuring the time required for the wave to reach back to the receiver after it was emitted.
The module can communicate in 3 ways: TTL (Serial UART), I2C/IIC and PWM mode. The serial port supports a speed between 9600bps and 115200bps.
The I2C address can be changed, this allows connecting several modules at the same time to the same development board. The modification of the I2C address is of Software type. Since changing the I2C address has not been tested yet, we do not guarantee that this is possible.
The module integrates a microcontroller that calculates the distance by itself.
Changing the operating mode is done by tinning the jumpers as follows:
The PWM mode makes it similar to the classic SR-04 modules, the transmitted information can be recorded on a digital pin that will interpret the PWM signal received from the module.
Ultrasonic modules do not work properly in environments with noticeable levels of EMR (electromagnetic interference). For example, they cannot be used near switching sources.
Description of pins:
VCC: Power supply 3-5VDC
GND: GND
CR: RX serial UART / SCL I2C / Trig
DT: TX serial UART / SDA I2C / Echo
INT: Status
PS: Mode selector: Serial / I2C / PWM
Specifications:
Supply voltage: 3 - 5VDC
Current consumption: 9mA
Measurement range: 20 - 720cm maximum (varies depending on the target surface)
Resolution: 1cm
Frequency response: 15Hz
Free measured frequency: 50Hz
I2C mode: Direct, Pixhawk, APM
Default I2C address: 0x70
Operating modes: Serial UART, I2C, PWM
Serial speed: 9600 - 115200bps, configurable