DQ连接树莓派的物理引脚7
打开总线后，在sys bus w1 devices 中有以28-开头的文件
第二行末尾除以1000为当前温度
import OS device_file =‘/sys/bus/w1/devices/28-012029929465/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
返回温度值的函数
打开i2c，载入luma库
$ sudo apt-get update $ sudo apt-get install python3 python3-pip python3-pil libjpeg-dev zlib1g-dev libfreetype6-dev liblcms2-dev libopenjp2-7 libtiff5 -y $ sudo -H pip3 install luma.oled
在屏幕上打印字符串
from luma.core.interface.serial import i2c, spi from luma.core.render import canvas from luma.oled.device import ssd1306, ssd1325, ssd1331, sh1106 serial = i2c(port=1, address=0x3C) device = sh1106(serial) while True: with canvas(device) as dr: #print(‘temp C = %f‘%read_temp()) dr.text((30, 40), str(read_temp()), fill="white")
最终程序
#!/usr/bin/python3 import os,time from luma.core.interface.serial import i2c, spi from luma.core.render import canvas from luma.oled.device import ssd1306, ssd1325, ssd1331, sh1106 serial = i2c(port=1, address=0x3C) device = sh1106(serial) device_file =‘/sys/bus/w1/devices/28-012029929465/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: with canvas(device) as dr: #print(‘temp C = %f‘%read_temp()) dr.text((30, 40), str(read_temp()), fill="white")
原文：https://www.cnblogs.com/SFWR-YOU/p/14483726.html