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What micro_mon does

micro_mon is a project for the Raspberry pi pico, specifically the wavershare RP2040-Zero. This is essentially a smaller PCB version of the rapsberry pi pico, with a color LED on it.

The project monitors current using a current transformer feeding into the A/D converter on the pico. It can detect microwaving by the high current draw, and opening the microwave door by the current draw from the light bulb inside the oven.

If something is microwaved, but we miss the microwave oven's beep for when its done because the kids are making a rukus, we often forget about the food. Our microwave will only beep once after its done.

This hack will periodically beep after microwaving until the microwave door is opened to retrieve the food.

Schematic

Build environment

This relies on a command line based build environment, either running on a Raspberry PI 4 or under windows WSL.

Please see "P4 dev env setup notes.txt" for how to set this up on a pi.

Or see "windows dev env setup.txt" for how to set up the build environment under windows.

Pieces you might want to re-use

Simple code to program the 3-color LED on the wavershare RP2040-Zero

Code to compute a measure of current from A/D readings from the current transformer

Code to beep a piezo speaker connected to the pico.

License

micro_mon is licensed under the GPL version 2 (not version 3) For details, please see here:
http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details (docs/license.txt)

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Microwave oven food reminder

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