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Question of the Day: What is the ultimate French toast topping?
Smart (2.4ghz) non-cloud based water meter?
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HibiscusTunes
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Also interested
I've emailed these guys https://www.driy.co.za/ to see if the device has a local (LAN) website/page / API that can be used to scrape readings etc.
Dairyfarmer
Executive Member
R5K!!!!
An electronic flow meter and an Arduino or RasPi would set you back less than R1000. Nice little diy project. heaps of tutorials on line.
indeed.. found this - https://www.instructables.com/id/Flowmeter-NodeMcu-Counting-Litres/
looks pretty good - just need a solenoid as well
check if your meter supports a reed switch?
So I first bought one of these:
www.robotics.org.za
Fitted it, then realised that the pulses change in frequency depending on how hard the water flows through it, saw on https://github.com/sekdiy/FlowMeter/wiki/Sensors#fs400a this guy did some testing with the same one and wrote custom firmware to try calculate it based on flow etc;
I decided to rather get a proper meter that sent a pulse every X litres so found this bad boy that has a reed switch option: http://transducers.co.za/categories.../trantech-ttmjv-b-multi-jet-water-meter/#1076
Ordered it (R1437.50 incl vat and delivery to CPT)
Fitted it, the 25mm one gives a pulse every 10 litres if you use the single reed, or every 5 litres if you use both reeds (it comes with 3 cables (1) common (2) reed 1 (3) reed 2). Wired it to a Sonoff SV with Tasmota and now I get a pulse every 5 litres.
Spent a lot of time figuring out how to wire it but it's basically Common >> Ground then each reed to a GPIO, setup the counter on one of the GPIO's and it works (no voltage).
Also initially wired it up to an ESP32 running ESPEasy but when I fitted it, every time I saved the counter settings the board would corrupt and go into a boot loop which I found was a bug from ESPEasy's github pages and I assume the experimental ESP32 release of ESPEasy was affected by it.
It is 25mm and our mains pipes are 20mm so you do need a reducer and to cut out a piece of pipe to fit it in, luckily mine is easily accessible as it comes into the house and I have sheltered power right next to it.
FS400A-G1 flow meter - Micro Robotics
FS400A-G1 Flow MeterWater flow sensors consists of magnetic core, rotating
www.robotics.org.za
I decided to rather get a proper meter that sent a pulse every X litres so found this bad boy that has a reed switch option: http://transducers.co.za/categories.../trantech-ttmjv-b-multi-jet-water-meter/#1076
Ordered it (R1437.50 incl vat and delivery to CPT)
Fitted it, the 25mm one gives a pulse every 10 litres if you use the single reed, or every 5 litres if you use both reeds (it comes with 3 cables (1) common (2) reed 1 (3) reed 2). Wired it to a Sonoff SV with Tasmota and now I get a pulse every 5 litres.
Spent a lot of time figuring out how to wire it but it's basically Common >> Ground then each reed to a GPIO, setup the counter on one of the GPIO's and it works (no voltage).
Also initially wired it up to an ESP32 running ESPEasy but when I fitted it, every time I saved the counter settings the board would corrupt and go into a boot loop which I found was a bug from ESPEasy's github pages and I assume the experimental ESP32 release of ESPEasy was affected by it.
It is 25mm and our mains pipes are 20mm so you do need a reducer and to cut out a piece of pipe to fit it in, luckily mine is easily accessible as it comes into the house and I have sheltered power right next to it.
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i realise there are cheaper meters that claim pulses per X litres - and some people have tested out too (eg: https://www.robotics.org.za/YF-S401?search=flow meter) - they say they can withstand 8 bar etc. but I'm not very comfortable fitting some cheap plastic meter to my mains - fluctuations in pressure etc. that we have in CPT I don't want it to blow apart - despite how low the chances may be.