BBQ and Kitchen Thermometer with Feather HUZZAH


From Roger Theriault on

Why did I make this?

My wife and I make cheese and yogurt at home. Both require multiple steps, a thermometer, and a bit of waiting. I had made a thermometer with an Adafruit Trinket Pro. It had an LCD, a button, and would beep when we reached specific temperatures to remind us when next steps were needed. We’d set it, forget it, wait for the beep, press the button, shut off the heat, stir, or add cultures, and ignore again til the next beeps. Very handy.

Then the LCD just stopped working. Instead of fixing it, I created this next iteration to take advantage of multiple Alexa devices we have throughout our home, new capabilities available via Alexa Skills Kit and AWS IoT, Lambda, DynamoDB, and more-capable Arduino software and hardware.

We now have flexible ways for Alexa to help us monitor and control what’s cooking in the kitchen, outside in our smoker/grill, and from any room and device in the house.

How does it work?

The Alexa skill handles the user interaction – ask it to make yogurt, and it fetches the matching recipe and sends the request to start that recipe on step 1 to the device, by way of a device shadow and MQTT, a communication protocol for the Internet of Things.

The device watches for changes to the shadow, and uses recipe data onboard to set the set point and show its status on the display.

The device takes temperature readings, updates the display and device shadow, and when a set point is reached, alerts the user. The Alexa skill can tell the user what the temperature is at any time, even if the device is asleep, by accessing the shadow data in the AWS cloud.

When the user hears or sees the alarm they can ask Alexa to go to the next step, and then Alexa will send the desired state (same recipe, step 2) to the shadow, and the device will switch to that state using the recipe data it has on flash memory.

There’s a bit more to it, which I’ll go over after we get the project built

Read more and see more on YouTube

8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 30,000+ makers on Adafruit’s Discord channels and be part of the community!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more

CircuitPython – The easiest way to program microcontrollers –

Maker Business — Over 500,000 manufacturing jobs are going unfilled

Wearables — Stop the sweat

Electronics — Hummm… 60Hz noise in your amplifier driving you nuts?

Python for Microcontrollers — Python on Microcontrollers Newsletter: EuroPython 2021, CircuitPython 7.0.0 alpha 5 and more! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — Forest Fire Beacons, IoT for Beginners, and more!

Microsoft MakeCode — MakeCode for the micro:bit - 2021 Release!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 7/28/21 w/ Adafruit MCP9601 (MCP96L01) I2C Thermocouple Amplifier – STEMMA QT /Qwiic!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.