Coffee Roaster Arduino Shield

Coffee Roaster Arduino Shield

The TC-4 shield won’t roast coffee for you, but this project will help you gather data from up to four thermocouples. From the related code repository:

Probably best to think of the TC4 as programmable interface hardware for multiple thermocouple sensors.
…support(s) both standalone operation using an LCD display and/or data logger operation if the TC4 is attached via USB cable to a PC.

Bourbon is a straightforward monitoring and logging application. When used as part of a standalone system it displays elapsed time, BT, ET, and BT-RoR on a 2-line LCD. Since Bourbon creates and sends a continuous data stream over the USB serial interface, realtime graphic display of roast history as well as CSV format data logging can be done if you connect the TC4 to your computer.

Here is forum member Rama’s implementation:

I roast my own coffee and would love to add better (more obsessive) temperature measurement to the mix.

You can get a bare PCB here, as well as a bill of materials for the necessary components.

Discuss this article with the rest of the community on our Discord server!

John Edgar Park likes to make things and tell people about it. He builds project for Adafruit Industries. You can find him at and twitter/IG @johnedgarpark

View more articles by John Edgar Park


Ready to dive into the realm of hands-on innovation? This collection serves as your passport to an exhilarating journey of cutting-edge tinkering and technological marvels, encompassing 15 indispensable books tailored for budding creators.