Raspberry Piのカメラで遊ぼう(初期編)

raspistill -o test.jpg

raspivid -o test.h264　

git clone https://github.com/silvanmelchior/RPi_Cam_Web_Interface.git

cd RPi_Cam_Web_Interface
sudo ./install.sh

http://[Raspberry Piのipアドレス]/

mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC
mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x92e820 (ENOSPC)
mmal: mmal_connection_enable: output port couldn't be enabled
Traceback (most recent call last):
  File "camera.py", line 6, in <module>
    camera = PiCamera()
  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 433, in __init__
    self._init_preview()
  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 513, in _init_preview
    self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
  File "/usr/lib/python3/dist-packages/picamera/renderers.py", line 558, in __init__
    self.renderer.inputs[0].connect(source).enable()
  File "/usr/lib/python3/dist-packages/picamera/mmalobj.py", line 2212, in enable
    prefix="Failed to enable connection")
  File "/usr/lib/python3/dist-packages/picamera/exc.py", line 184, in mmal_check
    raise PiCameraMMALError(status, prefix)
picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources

$ ls
'DoNot UseRPi_Cam_Web_Interface_Installer.sh'   config.txt          remove.sh
 LICENSE.txt                                    debug.sh            start.sh
 README.md                                      etc                 start.txt
 SECURITY.md                                    install.sh          stop.sh
 bin                                            install.txt         update.sh
 cam.sh                                         installreadme.txt   www

$ ./stop.sh

./start.sh

from picamera import PiCamera
from time import sleep

camera = PiCamera()

camera.start_preview()
sleep(5)
camera.capture('/home/[ユーザー名]/Pictures/image.jpg')
camera.stop_preview()

from picamera import PiCamera
from time import sleep
import datetime
import RPi.GPIO as GPIO

camera = PiCamera()

GPIO.setmode(GPIO.BCM)
GPIO.setup(24,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)


try:
    while True:
        if GPIO.input(24)==GPIO.HIGH:
            dt_now = datetime.datetime.now()
            filn = '/home/kazuhiro/Pictures/' + dt_now.strftime('%Y%m%d%H%M%S')
+ '.jpg'
            camera.capture(filn)
        sleep(1)

except KeyboardInterrupt:
        pass
GPIO.cleanup()

$ crontab -e

*/5 * * * * python3 /home/kazuhiro/Documents/camera_cron.py
※これを記述して保存する
内容は、5分事に/home/kazuhiro/Documents/camera_cron.pyをpython3で実行するという内容

from picamera import PiCamera
from time import sleep
import datetime

camera = PiCamera()

sleep(5)
dt_now = datetime.datetime.now()
filn = '/home/kazuhiro/Pictures/' + dt_now.strftime('%Y%m%d%H%M%S') + '.jpg'
camera.capture(filn)

import RPi.GPIO as GPIO
import requests
import os
import json
from picamera import PiCamera
from time import sleep
from urllib.parse import urljoin
import datetime

camera = PiCamera()

GPIO.setmode(GPIO.BCM)
GPIO.setup(24,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)

filename = ''
unique_id = 0
img_url = 0
img_width = 0
img_height = 0

url_base = '[投稿するWordPressのドメイン]'# アプリケーションパスワードで発行したパスワード

user = 'raspberry_pi' # ユーザー名
password = '[先ほど発行したアプリケーションパスワード]' # アプリケーションパスワードで発行したパスワード

pic_path = '/home/kazuhiro/Pictures/'

def wp_post():
    url = urljoin(url_base, 'wp-json/wp/v2/posts/')

    content = '<h2>Raspberry Piから自動投稿する</h2>'
    content += '<p>Raspberry Piの専用カメラモジュールがで撮影した写真を、pythonで自動投稿しています。</p>'
    content += '<figure class="wp-block-image size-full is-resized">'
    content += '<a href="https://yoshisyou.com/wordpress/wp-content/uploads/'
    content += img_url
    content += '"><img src="https://yoshisyou.com/wordpress/wp-content/uploads/'
    content += img_url
    content += '" alt="" class="wp-image-'
    content += str(unique_id)
    content += '" width="'
    content += str(img_width / 2)
    content += '" height="'
    content += str(img_height / 2)
    content += '"/></a></figure>'

    post = {
        'title': 'WordPress自動投稿テスト',
        'status': 'draft', # draft(下書き), publish(公開)
        'slug': 'wordpress-auto-post-test', # パーマリンク
        'categories': 1, # カテゴリID
        'date': datetime.datetime.now().isoformat(),
        'content': content,
    }

    res = requests.post(
        url,
        json=post,
        auth=(user, password),
        )
    return

def wp_upload_media():
    url = urljoin(url_base, 'wp-json/wp/v2/media/')

    file_path = os.path.join(pic_path, filename)

    f = open(file_path, 'rb')
    image_data = f.read()
    f.close()

    headers = {
        'Content-Type': 'image/png',
        'Content-Disposition': 'attachment; filename=' + filename,
    }

    res = requests.post(
        url,
        data=image_data,
        headers=headers,
        auth=(user, password),
        )
    res_dict = res.json()

    global unique_id
    unique_id = res_dict['id'] # アップロードした画像のID
    global img_url
    img_url = res_dict['media_details']['file']
    global img_width
    img_width = res_dict['media_details']['width']
    global img_height
    img_height = res_dict['media_details']['height']

    return

def photographing():
    dt_now = datetime.datetime.now()
    global filename
    filename = dt_now.strftime('%Y%m%d%H%M%S') + '.png'
    camera.capture(os.path.join(pic_path, filename))
    return

def main():
    try:
        while True:
            if GPIO.input(24)==GPIO.HIGH:
                photographing()
                wp_upload_media()
                wp_post()
            sleep(1)

    except KeyboardInterrupt:
        pass

if __name__ == '__main__':
    main()