AWS IoT Core's shadow updator (Invoke from 1-Click)

1click-updateAWSIoTCoreShadow.js

/* based on https://github.com/j3tm0t0/1-click/blob/master/functions/aws-iot-shadow/index.js */
/* required placement params in AWS IoT 1-click
    - thingName: for AWS IoT Core's thingName
*/
const endpoint = process.env['ENDPOINT'];
const accessKeyId = process.env['ACCESS_KEY_ID'];
const secretAccessKey = process.env['SECRET_ACCESS_KEY'];

const AWS = require('aws-sdk');
const iotdata = new AWS.IotData({endpoint, accessKeyId, secretAccessKey, region:'us-west-2'});

exports.handler = async (event) => {
    const clickType = event.deviceEvent.buttonClicked.clickType;
    const v = clickType === 'SINGLE' ? 1 : 0;
    const payload = JSON.stringify({state:{desired:{relay:v}}});

    const thingName = event.placementInfo.attributes.thingName;
    const params = {thingName, payload};
    console.log(params);
    try {
        const result = await iotdata.updateThingShadow(params).promise();
        console.log(result);
        return {statusCode: 200, body: JSON.stringify('Success')};
    } catch (err) {
        console.log(err);
        return {statusCode: 501, body: JSON.stringify(err)};
    }
};

changing line 10 to specify region: 'us-west-2', attendees do not need to care which region to place lambda function ( for better latency, us-west-2 will be the best though)

10c10
< const iotdata = new AWS.IotData({endpoint, accessKeyId, secretAccessKey});
---
> const iotdata = new AWS.IotData({endpoint, accessKeyId, secretAccessKey, region:'us-west-2'});