General > General Technical Chat
WHO USED ALL THE HOT WATER!!! Need a simple temperature data logger ** UPDATE **
KE5FX:
--- Quote from: Brumby on August 21, 2023, 11:08:01 am ---There is far more detail to the background that is not appropriate to share here, but let me just say that anyone who wishes to criticise the exercise for social reasons is doing so out of ignorance.
--- End quote ---
At the same time, the same can usually be said of one who attempts to solve a social problem through technological means.
ledtester:
Install a instant hot water electric shower head like this one:
mendip_discovery:
Someone I know did this to monitor his tea drinking,
http://www.ronketti.org.uk/temp.html
--- Quote ---For the technically curious, this lot is being processed by a Raspberry Pi, running Raspbian Linux. The Dallas DS18B20 temperature sensors are connected to the GPIO headers (3V3, Gnd and data, which is on GPIO4) and read by the kernel w1_therm module. This then punts the output to a logfile which is read by a bit of Perl that converts the tabular data to a graph, and builds a .png of it before uploading it to the server. It's not perfect. For some reason every now and then the sensor returns a "doesn't respond to CONVERT_TEMP" error and a -ve temperature. This is smoothed out by checking the CRC and re-reading if necessary.
--- End quote ---
Brumby:
--- Quote from: Kim Christensen on August 21, 2023, 02:54:11 pm ---
--- Quote from: Brumby on August 21, 2023, 06:26:33 am ---Please consider the practical aspects of addressing a problem before being so dismissive.
--- End quote ---
Kind of hard to do since this is the first time you've mentioned the camera.
--- End quote ---
But you didn't NEED to know about the camera. You were already told that the head of the household had the means to determine the required information. Even I didn't need to know exactly how they were going to do that.
--- Quote --- Now that we know this, your precise timestamping of pipe temperature makes more sense.
--- End quote ---
But, does having this knowledge change the way to approach the problem any differently?
--- Quote ---So another idea is a vibration sensor attached to the pipe listening for water flow. This will give a faster response than temperature.
--- End quote ---
Now THAT is why I presented this challenge here! This is certainly an idea I will investigate. Thank you!! :-+
--- Quote ---If the security cam has a microphone input, you could even feed this "audio" into it and have everything in one recording.
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I appreciate what you are saying, but the idea is to have the data displayed on a chart, so that the usage profile can be seen at a glance, hence a data logger is the way to go. However, I suppose having the audio available as well could be useful - but it's on the opposite side of the building and adding this functionality falls under the dreaded umbrella of "feature creep".
Brumby:
--- Quote from: KE5FX on August 21, 2023, 05:52:19 pm ---
--- Quote from: Brumby on August 21, 2023, 11:08:01 am ---There is far more detail to the background that is not appropriate to share here, but let me just say that anyone who wishes to criticise the exercise for social reasons is doing so out of ignorance.
--- End quote ---
At the same time, the same can usually be said of one who attempts to solve a social problem through technological means.
--- End quote ---
Perhaps so, but I am not prepared to try and justify this exercise to your satisfaction because:
1. I've already said enough
2. Privacy considerations
3. It would take too long
4. You would be unlikely to appreciate the subtleties involved. You know the saying: "You had to be there".
5. The usual social tools to address the situation have not been effective. This technological element to the problem is being explored so that those social tools have support.
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