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WGOT: World's Greatest Oven (Appliance?) Thermometer
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WGOT: World's Greatest Oven (Appliance?) Thermometer

by wolfer649 on Sun Feb 24, 2019 11:15 pm

WGOT Photo smallest.jpg
WGOT Photo smallest.jpg (41.32 KiB) Viewed 280 times

This is a standalone Raspberry Pi, Adafruit-based hardware assembly project and associated Python software that can be used to measure, chart and record appliance temperatures over time.

The beta software and associated hardware/software documentation can be found at the following link.
https://github.com/wolfer649/WGOT.

On the the 2.8" PiTFT capacitive touchscreen, this device will show the current temperature, with the option of an additional save/hold temperature value or even a graph of the temperature over time.
The selections are made by pressing associated buttons on the PiTFT screen's board and by touching the PiTFT screen.

- You can reset the timer, in case you want to start recording again – say after a false start or changing adjustment values.
- It creates a csv log file that can later be used offline, to build fancy graphs or spreadsheets for analysis purposes.
- Optionally, this Linux-based device can be shutdown and/or restarted at the touch of a single button, to avoid having to remove and replace the power supply connection.
- There is a handy flashing LED activity indicator, so that you can check if the software is alive: especially useful in "headless" mode.
- No Internet connection is required, because all of the timing is relative.
- Typical CPU utilization is less than 10% on a Raspberry Pi 3 B+.

For development purposes, the software can be tested on an attached X11 HDMI screen/keyboard (or via VNC) without access to the Adafruit PiTFT itself, by changing a single Python statement, though you will need the Adafruit Perma-Proto PiHat board with the Adafruit MAX31855 board attached to it.

The following are some sample screen shots.

tempex.png
Sample temperature vs time display
tempex.png (5.13 KiB) Viewed 280 times

graphex.png
Sample chart display
graphex.png (9.28 KiB) Viewed 280 times

wolfer649
 
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Re: WGOT: World's Greatest Oven (Appliance?) Thermometer

by adafruit_support_mike on Mon Feb 25, 2019 6:37 am

Nice! Thanks for posting!

I like the fact that you used a thermocouple, so it's good for high-temperature operation.

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Re: WGOT: World's Greatest Oven (Appliance?) Thermometer

by wolfer649 on Thu Jul 18, 2019 5:32 pm

FYI, the GitHub content has been updated to include updates, bug fixes, better documentation and how to make an actual enclosure case.
(Photos have been vastly improved too, eh.)

wolfer649
 
Posts: 12
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Re: WGOT: World's Greatest Oven (Appliance?) Thermometer

by adafruit_support_mike on Sun Jul 21, 2019 2:32 pm

Thanks for posting the update!

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Please be positive and constructive with your questions and comments.