#HA water quality monitor

1 messages · Page 1 of 1 (latest)

tulip orbit
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I am not familiar with these exact sensors, but I am sure that they are no big deal. However using a full size Pi seems overkill for a job that any ESP or Pi Pico W could do for 2-5 bucks. Also they are not only cheap but available unlike the Pi.
Do you have an idea of how many things you want to connect?
2x PH sensor
1x Pump control relay
2x temp sensor
...whatever

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HA water quality monitor

honest turret
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Dont have any experience with ESP, but seems to be the best option....

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Project consists of the following for now

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Reef Tank:

  • PH Sensor
  • Temp Sensor
  • NH3 Sensor
  • Salinity Sensor
  • Water Level Sensor (Return pump chamber of sump filter)

Koi Pond:

  • PH Sensor
  • Temp Sensor
  • NH3 Sensor
  • Water Level Sensor

Pool:

  • PH Sensor
  • Temp Sensor
honest turret
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SO in this thread im going to try and create a BOM/Build of Materials.

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And try to document it as detailed as possible.

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First choice is the foundation.... Andrino or ESP... and im going ESP

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is ESP32 overkill? im considering it because of the CPU and extra GPIO pins

tulip orbit
honest turret
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The PH sensors seem to be th emost exspensive part of this project

tulip orbit
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~15 bucks for the cheapest, yes

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I have experience with coding MQTT esp8266 devices so I could help with that because esp32 is pretty much the same and most libraries support both.

honest turret
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I have NO coding experience with Either... So its going to be a huge learning curve....

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I just want to get the correct components . Thats my biggest concern

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Found a local supplier for ESP32 boards..... BUT for th esame price as 1 unit, I can get 10 from Aliexpress including shipping.....

tulip orbit
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As long as you have the sensors with reasonable readings and wifi the rest is coding magic. I like to put OTA update code into my boards so I don't even need to move to refresh code version.
Most important is to get example code to read the sensors one at a time. then just add all the wifi and combine it all.

honest turret
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Im based in South Africa, so shipping via Alliexpress takes 30-50 days...

tulip orbit
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keep in mind ESP boards have 3.3v analog pins so you may need a voltage divider (2 resistors) to not damage the input pin

honest turret
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This is what I need?

tulip orbit
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all of them seem to be the same with power and an analog output

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I recommend looking at tutorials to see what kind of code and sensors people use. these tutorials should also show how good/bad a sensor is at reporting values.

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also with this specific sensor you sent there should be no issue as long as PH does not go below 4 (aka go above 3.2v)

Screenshot_from_2022-08-16_16-18-04.png
honest turret
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IF it does go below that, My fish will be allready dead 😂

tulip orbit
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yeah

honest turret
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Temp Sensors? DS18B20 is most common.....

tulip orbit
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the voltage change is very small (just 1v between PH4 and PH10) with 12bit analog reading on esp32 (0-4095) 4095/3.3/6 gives you ~206 readings between each PH level. seems decent if we assume it is linear but there might be some reading inaccuracies

honest turret
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Seems that you have a lot of experience with this... Im practically new to all this....

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Stupid Question.... *Suitable platform: for Arduino and Raspberry Pi will it work with ESP32 module?

tulip orbit
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well I want to make sure you don't end up buying a sensor that gives you +- 1PH readings at best because as far as I know fish are very sensitive to these conditions. I guess at least 1 decimal place with decent accuracy after calibration should do.

tulip orbit
honest turret
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👍

tulip orbit
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and make sure it is meant for microelectronics so 5v or 3.3v and not 12v or mains voltage as those need extra hardware to safely hook up

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Also feel free to DM me, but you wanna keep it in this thread that is fine too

honest turret
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Temp Sensors some are just the probes....

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https://www.aliexpress.com/item/1005004412646322.html?spm=a2g0o.detail.1000014.7.52a63468YOx9P5&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40000.267768.0&scm_id=1007.40000.267768.0&scm-url=1007.40000.267768.0&pvid=633105d7-c327-4920-878d-c3a29ba66d20&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.40000.267768.0,pvid:633105d7-c327-4920-878d-c3a29ba66d20,tpp_buckets:668%232846%238110%23325&pdp_ext_f={"sku_id"%3A"12000029092710723"%2C"sceneId"%3A"30050"}&pdp_npi=2%40dis!ZAR!18.15!14.55!!!!!%40210323a716606602356523187e3df5!12000029092710723!rec

aliexpress.com
0.88US $ 20% OFF|Ds18b20 Temperature Sensor Stainless Steel Package...

Smarter Shopping, Better Living! Aliexpress.com

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Other option

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https://www.aliexpress.com/item/1005004510890825.html?spm=a2g0o.detail.1000014.8.52a63468YOx9P5&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40000.267768.0&scm_id=1007.40000.267768.0&scm-url=1007.40000.267768.0&pvid=633105d7-c327-4920-878d-c3a29ba66d20&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.40000.267768.0,pvid:633105d7-c327-4920-878d-c3a29ba66d20,tpp_buckets:668%232846%238110%23325&pdp_ext_f={"sku_id"%3A"12000029421574061"%2C"sceneId"%3A"30050"}&pdp_npi=2%40dis!ZAR!7.36!6.54!!!!!%40210323a716606602356523187e3df5!12000029421574061!rec

aliexpress.com
0.4US $ 12% OFF|DS18B20 Temperature Sensor Module Kit Waterproof 10...

Smarter Shopping, Better Living! Aliexpress.com

tulip orbit
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yep, they don't need a converter board

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same code should work. the fact they use an arduino is not very different

honest turret
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I have alot of research still to do....

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But thanx so much for your help thus far...

tulip orbit
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you just need a (waterproof) temp probe there may be some with 3 wires (2 power + analog data) it just changes resistance with temperature and gives a different volatge output.

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others have 2 wires if it is just the bare thermo-couple, but try to avoid those because they need external resistors

honest turret
tulip orbit
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float sensors (triggers at a specific level) are also very simple and cheap. they are just water activated switches

honest turret
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difficulty i sgoing to be the Salinity sensor

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is going

tulip orbit
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so it just needs to tell you if the level good (triggered) or below (open)

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all these sensors will need a lot of analog pins, poor digital pins will not be used

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well float sensors are digital, but the rest all seem to be analog

honest turret
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Temp and PH is the most important for my Reef Tank.

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Salinity is a nice to have

tulip orbit
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3x temp sensor (3 analog pins)
3x PH sensor (3 analog pins)
? float water level sensors (digital)
? salininty sensor (?)

honest turret
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I will have 3 ESP32 Boards

tulip orbit
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oh because of the different tank locations, that makes sense and also makes it easier to assign appropriate pins

honest turret
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Yip

honest turret
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Water Level Sensor...

tulip orbit
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it gives you a range of water levels? I think it is simpler to have a float switch or 2 that just reports water/no_water. also depends on price and what you want

honest turret
honest turret
tulip orbit
honest turret
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Hence I will use ur advice and go with Float Sensors

tulip orbit
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so one board would need:
2x float sensor
1x temp sensor
1x PH sensor
1x NH3 sensor
1x salinity sensor
at maximum (in case of the reef tank)

honest turret
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Yip....

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But Salinity and NH3 Sensors I cant find

tulip orbit
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not sure if it is worth putting redundant sensors in there. what is the worst that could happen if a sensor goes bad?

honest turret
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Reef tank and Koi Pond has been runninh 3 & 5 yrs respectively without any sensors.... So thi sis just for me to keep an eye in betwen Bi-Weekly Testing of the water

tulip orbit
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We could do it like in an airplane, have 2 of everything and if they have different readings you get an error, but I don't think it is worth the extra cost by any means

tulip orbit
honest turret
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Im gonna call it a night.

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Thanx so much for your advice and help today...

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Will let you know once I received everything..... in +-30days from now 😂