Coffee Roaster

A Raspberry Pi 3 coffee roaster running on Windows IoT.

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### Purpose Coffee roasting at home allows complete control over the final flavor of a cup of coffee.

Although many manual methods can be used for roasting coffee beans at home, I wanted a precise and mostly automated way of roasting small batches of beans.

Features

• Operated via web app on a mobile device
• Ability to control fan and heating elements separately
• Ability to hold a steady temperature
• Chart to display roasting profile
• Automatic safety cool-down if temperature is too high
• REST API control of hardware for easy integration across platforms

Hardware

• Raspberry Pi 3
• MAX31855 Thermocouple
• 1040 watt heating element from Nostalgia hot air popper
• 18 volt fan from Nostalgia hot air popper
• 25A 24-380VAC relay for controlling heating element
• 25A 5-200VDC relay for controlling fan
• Glass hurricane lamp chimney
• PC power supply for easy power management

Software

• Windows IoT Core
• jQuery Mobile
• Restup REST api for Windows UWP