Forked from dave-malone/aws-iot-update-thing-shadow-lambda-function.js
Created
January 15, 2021 07:38
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AWS Lambda function example of how to update IoT Thing Shadows
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const AWS = require('aws-sdk') | |
AWS.config.region = process.env.AWS_REGION | |
const iotdata = new AWS.IotData({ | |
endpoint: process.env.MQTT_BROKER_ENDPOINT, | |
accessKeyId: process.env.ACCESS_KEY_ID, | |
secretAccessKey: process.env.SECRET_ACCESS_KEY | |
}) | |
const openState = "open" | |
const closedState = "closed" | |
let currentState = closedState | |
function toggleGarageDoor() { | |
return new Promise((resolve, reject) => { | |
let desiredState = (currentState === closedState) ? openState : closedState | |
var params = { | |
payload: `{"state":{"desired":{"door":"${desiredState}"}}}`, | |
thingName: process.env.THING_NAME | |
} | |
iotdata.updateThingShadow(params, (err, data) => { | |
if (err){ | |
console.log(err, err.stack) | |
reject(`Failed to update thing shadow: ${err.errorMessage}`) | |
}else{ | |
console.log(`update thing shadow response: ${JSON.stringify(data)}`) | |
currentState = desiredState | |
resolve({"update thing shadow response": data}) | |
} | |
}) | |
}) | |
} | |
exports.handler = async (event, context, callback) => { | |
await toggleGarageDoor() | |
.then((result) => callback(null, result)) | |
.catch((err) => callback(err)) | |
} |
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