raspberry pi (11) DS18B20温度传感器,DHT11数字温湿度传感器,BMP180气压传感器
作者:互联网
1.DS18B20温度传感器
#!/usr/bin/env python3
import os
ds18b20 = ''
def setup():
global ds18b20
for i in os.listdir('/sys/bus/w1/devices'):
if i != 'w1_bus_master1':
ds18b20 = i
def read():
# global ds18b20
location = '/sys/bus/w1/devices/' + ds18b20 + '/w1_slave'
tfile = open(location)
text = tfile.read()
tfile.close()
secondline = text.split("\n")[1]
temperaturedata = secondline.split(" ")[9]
temperature = float(temperaturedata[2:])
temperature = temperature / 1000
return temperature
def loop():
while True:
if read() != None:
print("Current temperature : %0.3f C" % read())
def destroy():
pass
if __name__ == '__main__':
try:
setup()
loop()
except KeyboardInterrupt:
destroy()
2.DHT11数字温湿度传感器
#!/usr/bin/env python
import Adafruit_DHT as DHT
import RPi.GPIO as GPIO
Sensor = 11
humiture = 17
def setup():
print 'Setting up, please wait...'
def loop():
while True:
humidity, temperature = DHT.read_retry(Sensor, humiture)
if humidity is not None and temperature is not None:
print 'Temp={0:0.1f}*C Humidity={1:0.1f}%'.format(temperature, humidity)
else:
print 'Failed to get reading. Try again!'
def destroy():
GPIO.cleanup()
if __name__ == "__main__":
setup()
try:
loop()
except KeyboardInterrupt:
destroy()
3.BMP180气压传感器
#!/usr/bin/env python
#---------------------------------------------------------
#
# This is a program for Barometer Pressure Sensor
# Module. It could measure the pressure and temperature.
#
# This program depend on BMP085.py writted by
# Adafruit.
#
# Barometer Module Pi
# VCC ----------------- 3.3V
# GND ------------------ GND
# SCL ----------------- SCL1
# SDA ----------------- SDA1
#
#---------------------------------------------------------
import Adafruit_BMP.BMP085 as BMP085
import time
def setup():
print '\n Barometer begins...'
def loop():
while True:
sensor = BMP085.BMP085()
temp = sensor.read_temperature() # Read temperature to veriable temp
pressure = sensor.read_pressure() # Read pressure to veriable pressure
print ''
print ' Temperature = {0:0.2f} C'.format(temp) # Print temperature
print ' Pressure = {0:0.2f} Pa'.format(pressure) # Print pressure
time.sleep(1)
print ''
def destory():
GPIO.cleanup() # Release resource
if __name__ == '__main__': # Program start from here
setup()
try:
loop()
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
destory()
标签:__,温度传感器,temperature,read,温湿度,pressure,传感器,print,def 来源: https://blog.csdn.net/guzhou_diaoke/article/details/89600475