AWS Lambda Function (Node.js) から AWS IoT に publish する （aws-iot-device-sdk使用） https://blog.r3it.com/

handler.js

const awsIot = require('aws-iot-device-sdk');

const device = awsIot.device({
    keyPath: '9xxxx9x999-private.pem.key',
    certPath: '9xxxx9x999-certificate.pem.crt',
    caPath: 'root.pem',
    clientId: 'iotTest',
    host: 'endpoint.iot.ap-northeast-1.amazonaws.com'
});

device.on('connect', () => {
    device.publish('topic_1', JSON.stringify({ message_id: 1, Message: 'Hello World' }));
});