Example aws/aws-sdk-js IotData API Lambda usage

index.js

// An usage of AWS.IotData in Lambdas
//
// This example assumes some things
// 1. That you have a environment variable AWS_IOT_ENDPOINT. This is the url that you can find in AWS IoT dashboard settings
// 2. The lambda and your aws iot devices are on the same account and region

const AWS = require('aws-sdk');
const iotData = new AWS.IotData({ endpoint: process.env.AWS_IOT_ENDPOINT });

const handler = (event, context) => {
  const params = {
    topic: 'my/cool/topic',
    payload: JSON.stringify(event)
  }
  
  iotData.publish(params, (err, res) => {
    if (err) return context.fail(err);
    
    console.log(res);
    return context.succeed();
  });
};

exports.handler = handler;

nevermind, I solved adding this to roles

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "iot:*" ], "Resource": [ "*" ] } ] }