DIY Build A Remote Surveillance App Using Bluemix, Cloudant, And Raspberry Pi #piday #raspberrypi @Raspberry_Pi
Do it yourself: Build A Remote Surveillance App Using Bluemix, Cloudant, And Raspberry Pi. via developer works
Bluemix is an open-standards, cloud-based platform for building, managing, and running applications of all types (web, mobile, big data, and smart devices, for example).
To implement a home security system, you can create an app that sends pictures taken by a Raspberry Pi device to Cloudant. By using Node.js, you can display the picture on a web page that you can monitor remotely.
The home-security app performs the following actions:
1. Using Python, the app opens a web socket on the Raspberry Pi device.
2. The Node.js app running on Bluemix connects to that web socket.
3. The Python HGServerProtocol.onConnect event calls the function that takes the picture.
4. The picture is taken and uploaded to Cloudant.
5. The web socket returns the document ID to Node.js.
6. Node.js connects to Cloudant and uses the document ID to retrieve the image from the database.
7. Node.js displays the image on the web page.
This app uses the following protocols and classes:
The class HGServerProtocol, which implements the WebSocketServerProtocol on the Raspberry PI and defines what to do when the following events are encountered:
onConnect
onOpen
onMessage
onClose
The class HGCloudantDB, which handles the connection to the Cloudant database and handles the manipulation of the JSON documents (including the calls GET, PUT, POST, and so on)
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!