With this project, you can ask Alexa, if your door is open. It uses a magnetic sensor attached to ESP8266 to do detect if the door is open. Alexa skill can access the information using AWS Lambda function, Azure REST API, and SignalR via Raspberry Pi. When a user asks Alexa the state of the door, it invokes a lambda function. The function calls a REST API method hosted in Azure. The REST API method uses SignalR technology to query Raspberry Pi, which in turn requests that information from ESP8266.
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!
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.