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Simple sump pump monitoring task for use with DrMem control system.

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rneswold/sump-monitor

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dbd7ab4 · Feb 21, 2025

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drmem-drv-sump

Introduction

This project contains the source for a RaspberryPi Pico W microcontroller to be used in monitoring sump pumps. It uses its GPIO to read the state of the pumps and has a WiFi interface so a DrMem node can connect and monitor them.

A major requirement is the sump pump cannot be affected by the presence or absense of the RaspberryPi. This was accomplished by using a "current switch" (I am a happy customer of the Dwyer MCS-111050, but there are other, similar products.) I ran the hot wire through the current switch so when the sump pump runs, the relay closes. I configured GPIO4 to be an input with a pull-up resistor so the RaspberryPi can sense the relay's state.

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Simple sump pump monitoring task for use with DrMem control system.

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