用Python实现温度传感器
时间: 2024-03-06 12:43:09 浏览: 33
为了实现温度传感器,我们需要使用一些硬件设备,例如温度传感器和单片机等。在这里,我将提供一些Python代码示例,以便您了解如何使用Python读取温度传感器数据。
1. 使用Python的GPIO库读取DS18B20温度传感器数据
```python
import os
import glob
import time
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')
base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'
def read_temp_raw():
f = open(device_file, 'r')
lines = f.readlines()
f.close()
return lines
def read_temp():
lines = read_temp_raw()
while lines[0].strip()[-3:] != 'YES':
time.sleep(0.2)
lines = read_temp_raw()
equals_pos = lines[1].find('t=')
if equals_pos != -1:
temp_string = lines[1][equals_pos+2:]
temp_c = float(temp_string) / 1000.0
return temp_c
while True:
print(read_temp())
time.sleep(1)
```
2. 使用Python的smbus库读取LM75A温度传感器数据
```python
import smbus
import time
# Get I2C bus
bus = smbus.SMBus(1)
# LM75A address, 0x48(72)
# Select configuration register, 0x01(1)
# 0x00(0) Continuous conversion mode
bus.write_byte_data(0x48, 0x01, 0x00)
time.sleep(0.5)
# LM75A address, 0x48(72)
# Read data back from 0x00(0), 2 bytes
# temp MSB, temp LSB
data = bus.read_i2c_block_data(0x48, 0x00, 2)
# Convert the data to 9-bits
temp = (data[0] * 256 + (data[1] & 0x80)) / 128
if temp > 255 :
temp -= 512
# Output data to screen
print("Temperature : %.2f C" %temp)
```