Cloudy with a chance of Toast

Toaster Stationary box for the masses... IN THE CLOUD

Hardware

• 1x - IMK 2 Slice Toaster : $9.95
• 1x - NodeMCU ESP8266 : $5.01
• 16x - Red, Blue, Green, Yellow LEDs

Setup

Cert / AWS

Create the src/main.h file based on src/main.h.example with the relevant information for your project and save it.

#ifndef MAIN_H

// Wifi Details
const char *ssid = "YourWifiSSID";
const char *password = "YourWifiPassword";

const String thing_id = "YourThingID";

// AWS MQTT Details
char *aws_mqtt_server = "YourAWSThingID.iot.us-east-1.amazonaws.com";
char *aws_mqtt_client_id = "YourMQTTClientID";
char *aws_mqtt_thing_topic_pub = "Your/MQTT/Topic";
char *aws_mqtt_thing_topic_sub = "Your/MQTT/Topic";

#endif

Uploading Certificates

You will also need to create the cert files based on the output from the CloudFormation deploy of the vending machine

openssl x509 -in certs/certificate.pem.crt -out data/cert.der -outform DER
openssl rsa -in certs/private.pem.key -out data/private.der -outform DER
openssl x509 -in certs/root-CA.pem -out data/ca.der -outform DER

Then upload the certificates using SPIFFS

pio run -t uploadfs

MQTT Providers

AWS IoT

For more information on AWS IoT, check out the AWS IoT Setup guide

Platform IO

This project is build and run with PlatformIO. The library dependencies can be found in the platformio.ini file. Below is the current configuration targetting the NodeMCU varient of the ESP8266 development board.

[env:nodemcuv2]
platform = espressif8266
board = nodemcuv2
framework = arduino
monitor_speed = 115200

lib_deps =
    ArduinoJson@5.13.1
    PubSubClient@2.6

Audio Encoding

The audio clip within the /audio directory is used in main.h. This byte stream cannot exceed the Program Memory size of the microcontroller you have chosen to use.

The tutorial on setting up the audio clip for encoding can be founds here: http://highlowtech.org/?p=1963. It's important to note that you need a WAV/MP3 with a sample rate of 8Khz and a bit rate of 16Khz.

There's a copy of the EncodeAudio.exe binary in the /audio directory also incase the site mirror goes down.