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在TB购买的液晶模块，运行按照文档无法安装，后自己查找资料完成安装
参考文档Adafruit PiOLED - 128x32 Mini OLED for Raspberry Pi
接线示意如下图：一般线材颜色VCC红色，GND黑色，SDA蓝色，SCL黄色
# 1. 硬件连接完成开始配置树莓派
sudo raspi-config
开启树莓派配置工具，选择 Interface Options 选项
然后选择I2C选项会进入确认页面，选择yes或是确认开启，开启I2C。
然后执行
sudo reboot 重启树莓派，然后执行sudo i2cdetect -y 1 查看oled是否被识别。
出现如下0x3c 说明已被识别。
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
注：如果没有识别到请确认连线是否良好，线材是否有问题。 执行
sudo i2cdetect -l查看i2c列表,如下图，编号1的i2c已经加载i2c-1 i2c Synopsys DesignWare I2C adapter I2C adapter执行sudo i2cdetect -y 1查看oled被识别
2. 安装Python程序依赖，驱动oled
执行依赖安装命令 更新系统依赖
-
sudo apt-get update -
sudo apt-get upgrade -
sudo apt-get install vim
安装ssd1306驱动
sudo pip3 install adafruit-circuitpython-ssd1306
sudo apt-get install python3-pip
Python图像处理库
sudo apt-get install python3-pil
3. 执行数据显示程序，并配置到系统开机启动
程序代码如下：写入python代码 sudo vim oled.py
import time
import os
from board import SCL, SDA
import busio
import adafruit_ssd1306
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import subprocess
i2c = busio.I2C(SCL, SDA)
# Raspberry Pi pin configuration:
RST = None # on the PiOLED this pin isnt used
# 128x32 display with hardware I2C:
disp = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c)
# Initialize library.
disp.show()
# Create blank image for drawing.
# Make sure to create image with mode '1' for 1-bit color.
width = disp.width
height = disp.height
image = Image.new('1', (width, height))
# Get drawing object to draw on image.
draw = ImageDraw.Draw(image)
# Draw a black filled box to clear the image.
draw.rectangle((0,0,width,height), outline=0, fill=0)
# Draw some shapes.
# First define some constants to allow easy resizing of shapes.
padding = -2
top = padding
bottom = height-padding
# Move left to right keeping track of the current x position for drawing shapes.
x = 0
# Load default font.
font = ImageFont.load_default()
def getCPULoadRate():
f1 = os.popen("cat /proc/stat", 'r')
stat1 = f1.readline()
count = 10
data_1 = []
for i in range (count):
data_1.append(int(stat1.split(' ')[i+2]))
total_1 = data_1[0]+data_1[1]+data_1[2]+data_1[3]+data_1[4]+data_1[5]+data_1[6]+data_1[7]+data_1[8]+data_1[9]
idle_1 = data_1[3]
time.sleep(1)
f2 = os.popen("cat /proc/stat", 'r')
stat2 = f2.readline()
data_2 = []
for i in range (count):
data_2.append(int(stat2.split(' ')[i+2]))
total_2 = data_2[0]+data_2[1]+data_2[2]+data_2[3]+data_2[4]+data_2[5]+data_2[6]+data_2[7]+data_2[8]+data_2[9]
idle_2 = data_2[3]
total = int(total_2-total_1)
idle = int(idle_2-idle_1)
usage = int(total-idle)
# print("idle:"+str(idle)+" total:"+str(total))
usageRate = int(float(usage * 100 / total))
return "CPU:"+str(usageRate)+"%"
while True:
# Draw a black filled box to clear the image.
draw.rectangle((0,0,width,height), outline=0, fill=0)
CPU = getCPULoadRate()
cmd = os.popen('vcgencmd measure_temp').readline()
CPU_TEMP = cmd.replace("temp=","Temp:").replace("'C\n","C")
cmd = "free -m | awk 'NR==2{printf "Ram: %s /%s MB ", $2-$3,$2}'"
MemUsage = subprocess.check_output(cmd, shell = True )
MemUsage = MemUsage.decode('UTF-8','strict')
cmd = "df -h | awk '$NF=="/"{printf "Disk: %d /%d MB", ($2-$3)*1024,$2*1024}'"
Disk = subprocess.check_output(cmd, shell = True )
Disk = Disk.decode('UTF-8','strict')
cmd = "hostname -I | cut -d' ' -f1"
IP = subprocess.check_output(cmd, shell = True )
IP = IP.decode('UTF-8','strict')
# Write two lines of text.
draw.text((x, top), str(CPU), font=font, fill=255)
draw.text((x+66, top), str(CPU_TEMP), font=font, fill=255)
draw.text((x, top+8), str(MemUsage), font=font, fill=255)
draw.text((x, top+16), str(Disk), font=font, fill=255)
draw.text((x, top+24), "IP:" + str(IP), font=font, fill=255)
# Display image.
disp.image(image)
disp.show()
time.sleep(.1)
编写启动脚本 sudo vim start.sh
#!/bin/sh
sleep 5s
python /home/pi/oled/oled.py &
注：请确认启动脚本中oled.py是否与你创建的路径保持一致
配置开机启动
sudo vim /etc/rc.local
在 exit 0 上添加一行
/home/pi/oled/start.sh
执行重启 测试是否正常。
sudo reboot