Weather On Micro:bit

Introduction

With this skill, kids can ask Amazon Alexa the current weather. The result will display on BBC micro:bit LEDs. This is a sample that connects Amazon Alexa and BBC micro:bit.

Application Id: amzn1.ask.skill.3d69813d-d47b-4cf7-8e79-af25b589b8f6

Step 1 : Make Amazon Alexa Skill (Amazon Alexa herself. )

• Go to https://developer.amazon.com/edw/home.html#/skills/list and click "Add a New Skill ".

• Select Skill Type: Custom Interaction Model , and input Name and Invocation Name , Click Next .

• Input Intent Schema and Sample Utterances, and click Next .

• Input AWS Lambda ARN (See Step 2 : Make AWS Lambda), click Next

• Then you can test the skill, if you finish Publishing Information and Privacy & Compliance, you can submit for Certification .

Step 2 : Make AWS Lambda (amazon Alexa's logic.)

• Go to https://console.aws.amazon.com/lambda/home?region=us-east-1#/functions?display=list ,and click Create a Lambda function

• Select Blank Function

• Select Alexa Skills Kit, and click Next

• Input Name, and copy the lambda source to the source area, and input the other fields, click Next

• In the next screen, click Create function.

• Then you will see ARN, fill the arn to Step 1's arn field.

Step 3: Get weather information

• Go to http://openweathermap.org, and sign up a account, and you can find API key at your member page. Replace your app id by the key.

Step 4 : Send weather information to Android Device

• Go to https://console.aws.amazon.com/sns/v2/home?region=us-east-1#/applications, click Create platform application

• Input Application name, select Push notification platform to Google Cloud Messaging(GCM), input API key (You can get this key from firebase. See Step 5 : build for Android Device), click Create platform application

• Now you can find the ARN, replace android source by this arn (if necessary, modify Region field to your region).

• Go to https://console.aws.amazon.com/sns/v2/home?region=us-east-1#/topics , click Create new topic

• Input Topic name and Display name, then click Create topic.

• You can find topic ARN, and replace lambda source and android source. (if necessary, modify Region field to your region).

• Go to https://console.aws.amazon.com/cognito/federated/?region=us-east-1 ,click Create new identity pool .

• Input Identity pool name and check Enable access to unauthenticated identities .click Create Pool .

• In the next screen click Allow.

• You will find the cognito ARN, and replace android source by this arn (if necessary, modify Region field to your region).

• Go to https://console.aws.amazon.com/iam/home?region=us-east-1#/roles , select your cognito role name such as Cognito_xxxxxUnauth_Role.

• Click Edit Policy

• Add SNS permission such as below picture.

Step 5 : Build for Android Device

• Go to https://firebase.google.com ,you can Create new project ,and you can find Server key on Settings ' CLOUD MESSAGING tab. Fill this information to Step 4 : Send weather information to Android Device.

• Get the android source from https://github.com/tbchen/microbit-meets-alexa/tree/master/android

• Create firebase android app ,then download the google-services.json file from your firebase console, replace android source file.

• Use Android Studio import downloaded project, modify the arn information and firebase information, build app to android device.

Step 6 : Let micro:bit run!

• Go to https://pxt.microbit.org, add Bluetooth support, then click JavaScript, replace the source by micro:bit source.

• When you back to Blocks, you will see like below picture.

• Transfer this program to micro:bit. and DONE!