Fermion: URM37 Ultrasonic Distance Sensor Breakout (2~800cm, RS232 / UART)

URM37 V5.0 ultrasonic distance sensor with temperature compensation and 2–800cm range. Supports RS232 and UART output; compatible with various microcontroller boards.

Logical pinout · physical placement not verified

VCCOfficial table 2 row 1
Power input (3.3V-5.5V)
Type · Power
GNDOfficial table 2 row 2
Ground
Type · Ground
NRSTOfficial table 2 row 3
Reset
Type · Control
ECHOOfficial table 2 row 4
Measured distance presented by the Data Output0-25000US by PWM pulse width,1 CM /50US representative
Type · GPIO
SERVOOfficial table 2 row 5
Servo Control Pin
Type · Unknown
COMPTRIGOfficial table 2 row 6
COMP：On/OFF mode, when the detected distance is smaller than a pre-set value, this pin pulls low./TRIG：PWM mode trigger input
Type · GPIO
DAC_OUTOfficial table 2 row 7
Analog voltage output; the voltage is proportional to the distance
Type · Analog
RXDOfficial table 2 row 8
Asynchronous communication module data receiving pin: RS232/TTL level
Type · UART
TXDOfficial table 2 row 9
Asynchronous communication module data receiving pin: RS232/TTL level
Type · UART

Pin	Position	Type	Function
VCC	Official table 2 row 1	Power	Power input (3.3V-5.5V)
GND	Official table 2 row 2	Ground	Ground
NRST	Official table 2 row 3	Control	Reset
ECHO	Official table 2 row 4	GPIO	Measured distance presented by the Data Output0-25000US by PWM pulse width,1 CM /50US representative
SERVO	Official table 2 row 5	Unknown	Servo Control Pin
COMPTRIG	Official table 2 row 6	GPIO	COMP：On/OFF mode, when the detected distance is smaller than a pre-set value, this pin pulls low./TRIG：PWM mode trigger input
DAC_OUT	Official table 2 row 7	Analog	Analog voltage output; the voltage is proportional to the distance
RXD	Official table 2 row 8	UART	Asynchronous communication module data receiving pin: RS232/TTL level
TXD	Official table 2 row 9	UART	Asynchronous communication module data receiving pin: RS232/TTL level

Logical pinout · physical placement not verified

Pin details

9 connections

VCC
Power input (3.3V-5.5V)
Power
Official table 2 row 1
GND
Ground
Ground
Official table 2 row 2
NRST
Reset
Control
Official table 2 row 3
ECHO
Measured distance presented by the Data Output0-25000US by PWM pulse width,1 CM /50US representative
GPIO
Official table 2 row 4
SERVO
Servo Control Pin
Unknown
Official table 2 row 5
COMPTRIG
COMP：On/OFF mode, when the detected distance is smaller than a pre-set value, this pin pulls low./TRIG：PWM mode trigger input
GPIO
Official table 2 row 6
DAC_OUT
Analog voltage output; the voltage is proportional to the distance
Analog
Official table 2 row 7
RXD
Asynchronous communication module data receiving pin: RS232/TTL level
UART
Official table 2 row 8
TXD
Asynchronous communication module data receiving pin: RS232/TTL level
UART
Official table 2 row 9

Start wiring

I2C · SPI · Single data line · 3.3 – 5 V · Breakout

Pimoroni describes its VL53L1X breakout as a compact time-of-flight distance sensor with I²C address 0x29, 4–400 cm range, 27° field of v…

Module pins: VCC, RXD, TXD, GND, DAC_OUT. Schematik maps them to your board in the app.

Distance sensors

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