Ultra sonic Hcsb sr04 sensor connected to a raspi zero w to monitor the level of chlorine water s...

[G+_Dan Baldwin]

Ultra sonic Hcsb sr04 sensor connected to a raspi zero w to monitor the level of chlorine/water solution and send an email to warn when level falls below 2/3 of tank volume, thus preventing the level from running empty. When above 2/3, it prints cm below the sensor every 30 seconds. Once below 2/3, it emails at 30 minute intervals to keep from blowing up my email! 3D printed cases using PLA from thingverse; kudos to the designers as they fit like a glove! Next up: to send output to a second pi being used as a home security device using MQTTool.

[G+_Peter Hanse]

That's cool use of PI. What is solution used for? I am looking at ways to automate and monitor my pool and this could be used for auto chemical add level monitor.

[G+_Dan Baldwin]

Peter Hanse I use this for a whole house chlorination system where it adds a metered amount of chlorine/water solution injected into the house supply side then gets held to in a holding tank to kill the sulfur bacteria, then filtered out using charcoal tank filters and whole house filtration system before being used in house.

[G+_Dan Baldwin]

Peter Hanse I'll take a picture of whole system for you as soon as I get a chance.

[G+_Peter Hanse]

Interacting way to treat your water. Similar for pool but need to monitor pool free chlorine and available chlorine. Been trying to find pool chemical sensors that are cost effective and can be feed to controller with standard analog or digital signals.

[G+_Jason Perry]

Super cool. I maintained a pool for quite a few years and would have loved to have something like that.

 

My only question, why a pi? Would an Arduino to your MQTT broker, then to some automated email process not have streamlined it more?

 

PS. if you have any links to more information I would be interested.

[G+_Jason Perry]

Peter Hanse?, most systems use a ORP for the pH, and good luck with the chlorine sensor. Let me know if you find a reasonable one that gives reliable ones. Be cautious if it shocks the pool most chemical tests read 0 and you need to dilute the water 50% with distilled water to get a reading.

[G+_Dan Baldwin]

Jason Perry I've purchased a arduino uno and several versions of the esp8266 to "self learn" (no formal education) although ive had success getting them working I do have a hard time wrapping my head around understanding them. It's frustrating to say the least to many languages trying to communicate between the various devices. My goal is sensors and actuators that all report to a central device with a control panel some purchased some put together. Cost of the new pi zero at 10$ seemed like a good choice.

[G+_Peter Hanse]

Jason Perry I have seen some sensors but have to revisit this year and see if I can't find any in budget that will work at a budget price.

[G+_Gregory Hyder]

Peter Hanse I've also been unsuccessfully looking for a chlorine sensor to automate pool maintenance. A high chlorine metered bucket might be a workable solution that would require tweaking over time to get the levels correct. I intended to put a solar, Arduino or Pi float w/ sensors to monitor chemicals, and control metered output as needed, but the chlorine sensor has been a planning show stopper.

[G+_Peter Hanse]

Gregory Hyder I have found a the one bellow but need to get cost still

sbcontrol.com - CHEMTROL 255 PPM/pH POOL CONTROLLER

[G+_Jason Perry]

https://m.aliexpress.com/price/chlorine-sensor_price.html#/

[G+_Jason Perry]

A lot of them are chlorine gas sensors. The aqueous sensors are $1000+ and one for $18. I have seen them for $800CAD.

[G+_Jason Perry]

If you are looking to go the route of a pump and controlling the rate, the best ones I have used are made of a malleable tube I side a hard plastic ring, and have a bearing that travels around the inside. Other types of pumps corrode. After you set the rate, just make sure you keep an eye on the level, it's more important than if you don't have an automated system because the level can spike to unreadable levels.

[G+_Jason Perry]

I have always been interested in seeing how many variables I could monitor to try and predict the chlorine level before I take it.

[G+_Jason Perry]

Sorry for the rant