檢視Application - AWS IoT的原始碼

* Setup your AWS CLI installation
** sudo apt  install awscli 
* Go to IAM service to get the Access keys
** aws configure
<pre>
$ aws configure
AWS Access Key ID [None]: AKIAIOSFODNN7EXAMPLE
AWS Secret Access Key [None]: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
Default region name [None]: us-west-2
Default output format [None]: json
</pre>
* AWS development package - boto3
** pip install tornado nose 
** pip install boto3
* Get AWS FreeRTOS 
** https://github.com/aws/amazon-freertos
* Create IoT thing
** vim freertos/tools/aws_config_quick_start/configure.json
** cd freertos/tools/aws_config_quick_start 
** python SetupAWS.py setup 
* Toolchain version(5.2.0 is better)
<pre>
$ xtensa-esp32-elf-gcc --version
xtensa-esp32-elf-gcc (crosstool-NG crosstool-ng-1.22.0-80-g6c4433a) 5.2.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
</pre>
* Build 
<pre>
cd freertos
mkdir build
cmake -DVENDOR=espressif -DBOARD=esp32_wrover_kit -DCOMPILER=xtensa-esp32 -DCMAKE_BUILD_TYPE=Debug  -S . -B build
cd build
make all -j4
</pre>


*lambda
<pre>

var AWS = require('aws-sdk');

var iotdata = new AWS.IotData({endpoint:"a1q79ntmqqqssy-ats.iot.us-west-2.amazonaws.com"});

exports.handler = function(event, context, callback) {

console.log("found iotdata",iotdata);

    var params = {
        topic: 'iotdemo/topic/2',
        payload: 'on',
        qos: 0
        };


    iotdata.publish(params, function(err, data){
        if(err){
            console.log("Error occured : ",err);
        }
        else{
            console.log("success.....");
        }
    });

    callback();
};
</pre>
** Trigger
*** Allow Alexa skill kit with ARN
** IAM Permission
*** AWSIoTFullAccess 

* Reference
https://docs.aws.amazon.com/zh_tw/freertos/latest/userguide/getting_started_espressif.html