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'use strict';
var config = {};
var AWS = require('aws-sdk');
var Alexa = require('alexa-sdk');
//replace with endpoint from AWS IoT Device
var iotData = new AWS.IotData({endpoint: 'a22iwj71w43omu.iot.us-east-2.amazonaws.com', region: 'us-east-2'});
var APP_ID = undefined; //OPTIONAL: replace with 'amzn1.echo-sdk-ams.app.[your-unique-value-here]';
var SKILL_NAME = 'gateway-demo';
exports.handler = function(event, context, callback) {
var alexa = Alexa.handler(event, context);
alexa.APP_ID = APP_ID;
alexa.registerHandlers(handlers);
alexa.execute();
};
var led_state = 0;
var handlers = {
'LaunchRequest': function () {
var LEDState = [
{"state":{ "desired":{"device":"minnowboard_1","led":0}}}
];
var speechOutput="Gateway Operational";
AWSIoT.sendMessage(this, LEDState,speechOutput);
},
'DeviceStateIntent': function () {
var speechOutput;
var itemSlot = this.event.request.intent.slots.LEDState;
console.log("itemSlot: "+itemSlot);
var LED_State="none";
if (itemSlot && itemSlot.value) {
LED_State = itemSlot.value.toLowerCase();
}
console.log("LED_State: "+ LED_State);
var deviceState=null;
switch (LED_State) {
case "on":
led_state = 1;
deviceState = [
{'state':{ 'desired':{'device':'minnowboard_1','led_state':led_state}}}
];
speechOutput="L E D on";
console.log('on recieved')
break;
case "off":
led_state = 0;
deviceState = [
{'state':{ 'desired':{'device':'minnowboard_1','led_state':led_state}}}
];
speechOutput="L E D off";
break;
default:
speechOutput="no L E D state";
break;
}
if (deviceState===null) {
this.emit(':tell',speechOutput);
} else {
AWSIoT.sendMessage(this, deviceState, speechOutput);
console.log("message sent: ", deviceState )
}
},
'AMAZON.HelpIntent': function () {
this.attributes['speechOutput'] = 'You can ask questions such as, what\'s the L E D state, or, you can say exit... ' +
'Now, what can I help you with?';
this.attributes['repromptSpeech'] = 'You can say things like, what\'s the L E D state, or you can say exit...' +
' Now, what can I help you with?';
this.emit(':ask', this.attributes['speechOutput'], this.attributes['repromptSpeech'])
},
'AMAZON.RepeatIntent': function () {
this.emit(':ask', this.attributes['speechOutput'], this.attributes['repromptSpeech'])
},
'AMAZON.StopIntent': function () {
this.emit('SessionEndedRequest');
},
'AMAZON.CancelIntent': function () {
this.emit('SessionEndedRequest');
},
'SessionEndedRequest':function () {
this.emit(':tell', 'Goodbye!');
}
};
var AWSIoT = {
postSendMessage: function (thisOfParent,speechOutput) {
console.log('doot doot, all doot');
thisOfParent.emit(':tell', speechOutput);
},
sendMessage: function (thisOfParent, deviceState, speechOutput) {
var itemsProcessed = 0;
deviceState.forEach((item, index, array) => {
console.log("item "+index+": "+JSON.stringify(item));
console.log("device "+index+": "+item.state.desired.device)
var thingNameAndPayload= {
thingName: 'minnowboard_1',
payload: JSON.stringify(item)
};
iotData.updateThingShadow(thingNameAndPayload, function(err, data) {
console.log('sent shadow update')
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
if (err){
console.log("update error: ");
console.log(err);
//Handle the error here
speechOutput += " - Error updating device state: " + err + " ";
speechOutput += thingNameAndPayload.thingName + " ";
speechOutput += thingNameAndPayload.payload;
}
else {
console.log("update success: ");
console.log(data);
}
itemsProcessed++;
if(itemsProcessed === array.length) {
AWSIoT.postSendMessage(thisOfParent, speechOutput);
}
});
});
}
};
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