I maaaay have just gone full SCADA on my sump pump.pic.twitter.com/YUDD2RhRNM
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After a bit more digging to direct sump pump runoff into the trench, it appeared that the immediate danger of flooding was gone. The next step was to improve monitoring and alerting so that if it came back, I'd be able to respond rapidly before too much flooding occurred.
The parts I ordered after the Christmas flooding incident had come in, so I set to work building a proper monitoring system. I started with a DIN rail mount kit for a Raspberry Pi, a couple of I/O boards, and a 4-20 mA submersible liquid level sensor. Here's the dev setup.pic.twitter.com/9ngVHzesr7
Note the water on the floor in the bottom right corner of the previous pic. That's not spillage from the bucket I was testing the sensor on, that's an active leak into my lab. I also grabbed a Gentex horn/strobe and some water-sensing cables to place along walls in trouble spotspic.twitter.com/XvwvhWa5eU
The only remaining step was to code up a nice touchscreen HMI to crunch the data. It collects water level measurements at 1 Hz, does some averaging to reduce noise, then calculates tank volume and flow rate in L/hr.pic.twitter.com/QH79c5Ka8l
I plan to also track pump duty cycle over the long term (seconds on vs off over the past hour or something). Current/planned alarm conditions include water on the floor, tank level above the float, and flow rate approaching the pump's capacity.
Then the only remaining piece will be adding logging so I can collect trends over time and test effectiveness of outdoor drainage upgrades, and installing a 24V UPS so that I still get alarms even if the power goes out.
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