Tech learning

This is my second useful thing done through Alexa after simple implementation of switching on/off light. This is not just applicable to Sony Bravia TVs but any device which can be controlled through HTTP/JSON request or via any other protocol. Hardware prerequisites for making whole thing work are as follows: 1. Sony Bravia Android TV or other devices which can accept input through HTTP or different protocol. 2. Raspberry Pi to keep running program/service. 3. Alexa device. Software prerequisites: 1. Alexa Skill: https://developer.amazon.com/edw/home.html#/skills 2. Lambda: https://console.aws.amazon.com/lambda/home?region=us-east-1#/functions 3. AWS IoT: https://console.aws.amazon.com/iot/home?region=us-east-1 How the whole process would work? Alexa would accept voice commands and converts it to intend to make a request to Lambda function. Lambda function would use converted user-friendly commands to MQTT request on AWS IoT service which would be listened through MQTT ...

Raspberry Pi is a small, low powered motherboard contains 512 RAM, combined CPU and GPU. It has LAN, 2 USB, HDMI input, Audio Out, SD Card reader and S-Video connectors. We can have many Linux distribution OS on it. To configure, we just need to attach SD Card to it. SD Card could range from class 4 to class 10. In some cases Raspberry Pi could support less then class 4 cards too. It could be powered through mini USB mobile charger. Let's get started with installing OS on SD Card. There are various ways to install OS. Like we can download OSes through  http://www.raspberrypi.org/downloads  and follow the instructions given on it. There is something BerryBoot multi-boot loader through which we can have more then one OS on Raspberry Pi and boot OS according to our need.  http://www.berryterminal.com/doku.php/berryboot  instructions could be followed to install OS with very simple steps. You need to have internet connection on Raspberry Pi to install OS. It coul...