An Arduino-Based Sump Monitor (Part 1: Hardware) [Version 2]

February 26th, 2014

Several months ago I did another post on this, but it turns out it had significant problems due to galvanic corrosion. The solution seems to have been to switch from a DC circuit to an AC circuit. I've left that post around for reference, but this posting otherwise replaces it.

We have a below-grade basement. We have a sump, but we've had problems with the pumps, or more precisely, the pump switches. Note the use of the plural: several years ago we installed a second pump on a separate switch, but we have still had both of them fail.

So, I decided to build a monitor for the sump to measure both the height of the water in the sump and when (and if!) the pumps turn on. This needs to be able to send us alerts when something goes wrong, and may give us an idea of whether our sumps should be upgraded to something higher power.

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An Arduino-Based Sump Monitor (Part 2: Arduino Software)

July 10th, 2013

This posting describes the Arduino software and protocol used for my sump monitor. The previous posting describes the hardware. I may do an additional one later for the FreeBSD-based host software.

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IPv6 on a m0n0wall box using a Sonic.net-provided tunnel

July 6th, 2013

(I started this post in December 2011 but didn't finish it and then managed to forget about it. I figured I might as well finish it and get it out.)

I recently returned from the LISA 2011 conference, which was very good. One of the recurring themes was IPv6. That fired me up enough to try to get IPv6 fully working when I got home.

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An Arduino-Based Sump Monitor (Part 1: Hardware) [Updated]

July 3rd, 2013

This post is obsolete; please see the update here.

We have a below-grade basement. We have a sump, but we’ve had problems with the pumps, or more precisely, the pump switches. Note the use of the plural: several years ago we installed a second pump on a separate switch, but we have still had both of them fail.

So, I decided to build a monitor for the sump to measure both the height of the water in the sump and when (and if!) the pumps turn on. This needs to be able to send us alerts when something goes wrong, and may give us an idea of whether our sumps should be upgraded to something higher power.

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A Summary of My Computing/Communication Environment

December 11th, 2011

I'm writing this mostly so I can refer to it from other postings. It's not all that interesting in itself.

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