[raspberry] VNC 遠端控制

一知半解,試了好久,終於找到如下範例,一試就成功了

I failed to remote connect to Raspberry Pi 3 from Ubuntuhttps://raspberrypi.stackexchange.com/questions/68838/i-failed-to-remote-connect-to-raspberry-pi-3-from-ubuntu

不錯的文章:
安裝與設定Raspberry Pi的RealVNC伺服器
 https://swf.com.tw/?p=795

[raspberry]設定網路固定IP位址

cd /etc/network
sudo nano interfaces

打入如下內容:
auto eth0
iface eth0 inet static
address 1192.168.1.XX(希望的位址)
gateway 192.168.1.254
netmask 255.255.255.0
network 192.168.1.1
broadcast 192.168.1.125

按 Ctrl+O ,然後按 Enter 存檔
按 Ctrl+X 離開

重新開機

不錯的文章:
树莓派设置固定IP地址的三种方法 https://www.jianshu.com/p/308fb22a7dab

[python]time AND subprocess function

簡單的 time 範例:

import time
now=time.localtime()
print(now)
print(now.tm_hour)
print(now.tm_min)
print(now.tm_sec)

不錯的文章:
Python 日期和時間

http://www.runoob.com/python/python-date-time.html

Python多进程（1）——subprocess与Popen()

https://www.cnblogs.com/Security-Darren/p/4733368.html

Cheatsheet for Python subprocess

https://blog.aweimeow.tw/Cheatsheet-for-python-subprocess/

[python] feedparser

不太了解,先記著:

Python解析RSS（feedparser安裝與使用）
https://www.twblogs.net/a/5c600b1fbd9eee06ef3712ce


Using Feedparser in Pythonhttps://www.pythonforbeginners.com/feedparser/using-feedparser-in-python


嘗試建立gamil  有新郵件通知

USERNAME="mymain@gmail.com" 

PASSWORD="mypassword" 

PROTO="https://" 

SERVER="mail.google.com"

 PATH="/gmail/feed/atom"

newmails = int(feedparser.parse( PROTO + USERNAME + ":" + PASSWORD + "@" + SERVER + PATH )["feed"]["fullcount"])

一直都失敗,找不到原因 ???




[python]攝影機檔案儲存

cap=cv2.VideoCapture(0)

#decode
fourcc=cv2.VideoWriter_fourcc('I', '4', '2', '0')

#image save
out=cv2.VideoWriter('out.avi',fourcc,20.0,(640,480))

while(cap.isOpened()):
    ret,frame=cap.read()
    if ret==True:
        out.write(frame)
        cv2.imshow('frame',frame)
        if cv2.waitKey(1)& 0xFF==ord('q'):
            break
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()

[python]開啟攝影機

cap=cv2.VideoCapture(0)
while(cap.isOpened()):
    ret,frame=cap.read()
    cv2.imshow('frame',frame)
    if cv2.waitKey(1)& 0xFF==ord('q'):
            break

[python]使用opencv 秀圖

在 visual studio ,安裝 opencv,必須在安裝 packeage 的搜尋地方打入 opencv-python 才行

簡單的程式:

import cv2
import numpy as np
import os
mywd="c:\pydata"
os.chdir(mywd)
cv2.namedWindow("test_show",1)
img=cv2.imread("1.jpg",1)
cv2.imshow("test_show",img)
cv2.waitKey(0)  ==>沒寫這欄,只會有框,不會秀圖........

成功!!!