Ultrasonic distance sensor URM37 v5 2-800cm with temperature correction

Specification

• Supply voltage: from 3.3 V to 5.5 V
• Average current consumption: less than 20 mA
• Measuring range: 2 - 800 cm
• Resolution: 1 cm
• Communication interface:
  • RS232 (TTL - RX,TX pins)
  • PWM - from 0 to 25 000 μs with the change of 1 cm / 50 µS
  • Analog output - signal is proportional to the distance of 6.8 mV at 1 cm
• Measurement time: 100 ms
• The possibility to control modelling servo
• Protection against reverse connection of supply voltage
• Compensation of temperature influence on the measured value
• Working temperature: from -10°C to 70°C
• Dimensions: 51 x 22 mm
• Weight: 25 g

Description

Ultrasonic sensor from DFRobot operating in the range from 2 cm to 800 cm. It is powered with the voltage from 3,3 V to 5,5 V. Communication is via serial interface UART (RX, TX) and has an analog and frequency output as well as compensation temperature. The new modified algorithm provides high accuracy (1 cm) and small dead zone (up to 2 cm). Thanks to the introduction of MOTO, the user can directly controlthe modelling servo.

 

The product is compatible with Arduino

The manufacturer has prepared a user manualalong witha libraryfor Arduino users.

 

Connection Pin Description VCC Supply voltage from 3.3 V to 5.5 V. GND The ground of the system

NRST

The system reset.

ECHO

The frequency output: from 0 to 25,000μs, with the change of 1 cm / 50 µS.

SERVO

Output for controlling the modelling servo.

COMP/

Trig

COMP - digital output - when the measured value is smaller than a certain threshold, the output goes into a low status.

Trig - starting the measurement with the PWM signal.

DAC_

OUT

Analog output voltage proportional to the measured distance: 6.8 mV at 1 cm. RXD The receiver of the serial interface. TXD The transmitter of the serial interface.

 

Detailed description of the pins along with examples of connections available in the user manual.

 

Useful links

• The website of the manufacturer: DFRobot SEN0001
• User guide Wiki Doc
• The Arduino library
• Example of software "HelpMate"