Example Code for Raspberry Pi-Distance and Temperature Measurement

Software Preparation

Download URM09 library. (About how to install the library?)

Other Preparation Work

Ensure the Raspberry Pi has I2C enabled (via raspi-config), the module is connected correctly to the Raspberry Pi's I2C pins (VCC to 3.3V/5V, GND to GND, C to SCL (GPIO 3), D to SDA (GPIO 2)), and the URM09 library is installed.

Sample Code

# -*- coding:utf-8 -*-
'''
    # PassiveMeasure.py
    #
    # Connect board with raspberryPi.
    # Make board power and URM09 connection correct.
    # Run this demo.
    #
    # Set the i2c communication device number.
    # Set test mode and distance.
    # Get temperature and distance data.
    #
    # Copyright   [DFRobot](http://www.dfrobot.com), 2016
    # Copyright   GNU Lesser General Public License
    #
    # version  V2.0
    # date  2019-7-09
'''
import sys
import time

import URM09

sys.path.append("../..")
''' Create a URM09 object to communicate with I2C. '''
URM09 = URM09.DFRobot_URM09()
''' Set the i2c device number '''
URM09.begin(0x11)
time.sleep(0.1)
'''
    # The module is configured in automatic mode or passive
    #  _MEASURE_MODE_AUTOMATIC        // automatic mode
    #  _MEASURE_MODE_PASSIVE          // passive mode

    # The measurement distance is set to 500,300,100
    #  _MEASURE_RANG_500              // Ranging from 500
    #  _MEASURE_RANG_300              // Ranging from 300
    #  _MEASURE_RANG_150              // Ranging from 100
'''
URM09.SetModeRange(URM09._MEASURE_MODE_PASSIVE, URM09._MEASURE_RANG_500)
while(1):
    ''' Write command register and send ranging command '''
    URM09.SetMeasurement()
    time.sleep(0.1)
    ''' Read distance register '''
    dist = URM09.i2cReadDistance()
    ''' Read temperature register '''
    temp = URM09.i2cReadTemperature()

    print("Temperature is %.2f .c    " % (temp / 10))
    print("Distance is %d cm         " % dist)
    time.sleep(0.1)

Result