At the same time, Pi keeps recording the moment for a few more seconds. If moving happens, The Pi will capture a still image and send notification to phone immediately. When the script launch, it takes 2 seconds to warm up the camera to make sure everything works properly. It means you can send a command from mobile or web to Raspberry Pi for particular action such as (for instantly take a photo) or (to get current system information of Pi). (1) RaspberryPi&Camera module as the data source that continuously scan for motion and recording video at the same time, (2) PushBullet as the message-broker to send messages(text, still image, and videos) back and forth between RaspberryPi and Mobile/Web, and (3) mobile/web acts as “notifyee” who receives the still image and video of motion. There are 3 actors play together to build up the application. You will have a clear vision about what application does. This section explains the specification of application including app structure, and general flow chart.
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