Tutorial
Congratulations to you who bought our URM37 V4.0 Ultrasonic Sensor3, you now have the historical
most powerful ultrasonic ranging module.
First we have to understand this module basic function, there are three modes:
1. PWM triggered measurement mode
2. Automatically measure mode
3. Serial passive measurement
Then it also supports:
Simulation volume output (proportional with measurement distance, 6.8mV/cm )
Temperature read
Serial level choose(TTL or RS232 level)
Internal EEPROM without losing data
Serial EEPROM data read
The products have been conducted a set of rigorous tests by us, when you get your purchase, you
can do some setting according to your demands, firstly, you may have to set the serial port-level (or
RS232 TTL level), then we can access to the module through the serial port, then set the range
mode (0x02 writes data on the internal EEPROM address), after that, you can access to ultrasound
module through MCU or PC.
To begin with this Ultrasonic Sensor, there is a software could help to make it a lot of easier. And
there are some paramenters you may want to reverse to meet more situations.
NumLabel Description
1 VCC Power input (reference +5V)
2 GND Ground
3 NRST Reset
4 ECHO Measured distance presented by the Data Output 0-25000US by PWM pulse
width, 1 CM / 50US representative
5 MOTO Control the servo rotation angle
6 COMP/TRIG
COMP：On/OFF mode, when the detecting distance is smaller than a pre-set
value, this pin pulls low./TRIG：PWM mode trigger input
7 DAC
nalog voltage output ( each 6.8mV represents 1 cm )
8 RXD RS232/TTL mode
9 TXD RS232/TTL mode
