Wifi Water Temperature Sensor

[chubrok]

I am looking to add a WIFI pool water sensor so I can remotely check my water temp from my iPhone... Doing research... it looks like I can use a Sonoff TH16 and a ds18b20 sensor plumed into my system to achieve this... I am not looking to do any type of automation... just read water temp... I see lots of confusing posts on here regarding automation and I got lost... can someone confirm if this will work?

https://www.amazon.com/Temperature-thermowell-Stainless-fermenter-Homebrew/dp/B07F3GDQHY/ref=pd_sbs_196_t_0/147-5585320-5677206?_encoding=UTF8&pd_rd_i=B07F32MT97&pd_rd_r=496f0ed2-ccd1-495a-a0b7-5af3a39aa5ff&pd_rd_w=DceZI&pd_rd_wg=EXj6q&pf_rd_p=5cfcfe89-300f-47d2-b1ad-a4e27203a02a&pf_rd_r=GY40YRYRAQNH573XKFFW&refRID=GY40YRYRAQNH573XKFFW&th=1

https://www.amazon.com/dp/B06XTNSJ46/?coliid=I2AAP34QQS3F90&colid=2HTTXVZU071SE&psc=0&ref_=gv_ov_lig_pi_dp

Can the temp reading in the app be changed to Fahrenheit instead of Celsius?

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[magiteck]

I’m not sure about those components specifically, but giving you a bump.

I personally use this thermometer:

https://smile.amazon.com/dp/B08GFZS475

It is not Wi-Fi enabled by itself, but they sell a WiFi gateway that will make it so.

https://smile.amazon.com/dp/B08352XHWV

I haven’t bought the gateway yet; have been content just being able to see the temp from inside the house. Thinking about it though.

 

[Rancho Cost-a-Lotta]

I installed the Sonoff TH-16 with DS18B20 probe. I use it to monitor temps and control my heater. I used a thermowell threaded into a tee-fitting. It works with the eWelink app, Alexa, HA, Smart Things and others. Mine is connected to 120 volts.

The temp probe plugs into the TH-16, so I don't think the probe you linked will work.

 

[Rancho Cost-a-Lotta]

Can the temp reading in the app be changed to Fahrenheit instead of Celsius?

Forgot to answer this.

Yes.

 

[chubrok]

Thanks for the info. Now I just have to find the TH-16 in stock. Out at Amazon & the ones from eBay take like a month to arrive from China.

Thanks for the info about the thermowell. Do you know what size is needed for the DS18B20?

 

[Rancho Cost-a-Lotta]

Do you know what size is needed for the DS18B20?

The 50mm thermowell fit perfect. The probe was a little loose inside, so I was concerned about the accuracy. No issues there; the temps are within one degree of my heater's reading.

Just another tidbit of info. The cord on the probe is short, about one meter. I ordered a Sonoff (packaging showed a Sonoff product/part number) extension cord for the probe despite reviews that it didn't work. I lost that gamble and ended up returning it. I was able to wire the switch close enough to make the cord work. I didn't want to take the chance of splicing into the factory cord and couldn't find a suitable extension cord.

I paid $36 for the TH-16 w/ probe. I shopped around and found much better pricing, but didn't want to wait for a ship to deliver it. I just paid the premium. I'll keep my eyes open and will ping you if it shows back up on Amazon.

 

[chubrok]

The 50mm thermowell fit perfect. The probe was a little loose inside, so I was concerned about the accuracy. No issues there; the temps are within one degree of my heater's reading.

Just another tidbit of info. The cord on the probe is short, about one meter. I ordered a Sonoff (packaging showed a Sonoff product/part number) extension cord for the probe despite reviews that it didn't work. I lost that gamble and ended up returning it. I was able to wire the switch close enough to make the cord work. I didn't want to take the chance of splicing into the factory cord and couldn't find a suitable extension cord.

I paid $36 for the TH-16 w/ probe. I shopped around and found much better pricing, but didn't want to wait for a ship to deliver it. I just paid the premium. I'll keep my eyes open and will ping you if it shows back up on Amazon.

I just wanted to say thank you for your help… I was able to find one on letgo for $12 shipping included with the probe and after about five dollars in Home Depot parts and 10 minutes of work I now have a Wi-Fi thermostat. Works awesome. Now just waiting for the waterproof closure and extension cable to come in and I’m set.

 

[Rancho Cost-a-Lotta]

That's great! The extension cord I used would not work. Let me know if you're able to get yours to work.

 

[chubrok]

That's great! The extension cord I used would not work. Let me know if you're able to get yours to work.

I just wish I knew what size connector that is as I only need about 3 feet in the cable it’s coming as about 15 feet

 

[chubrok]

That's great! The extension cord I used would not work. Let me know if you're able to get yours to work.

https://www.amazon.com/gp/aw/d/B08J42YSHC?psc=1&ref=ppx_pop_mob_b_asin_image

Just arrived… so far so good.

 

[Rancho Cost-a-Lotta]

https://www.amazon.com/gp/aw/d/B08J42YSHC?psc=1&ref=ppx_pop_mob_b_asin_image

Just arrived… so far so good.

Good find. Thanks for the tip!

 

[chubrok]

Good find. Thanks for the tip!

You had mentioned that you use the Sonoff to control your heater... I know you can wire a 110v device into it to turn it on/off at certain thresholds... how did you wire in your heater for controlling remotely?

 

[Rancho Cost-a-Lotta]

I can't type much right now. For now, check out the link below. Take a look at your heater's manual for connecting to automation or remote control.

Smart Wifi Pool Timer with Fireman's Switch?

Happy summer pool season, everyone! Just opened my pool with a quick SLAM and was looking to upgrade my setup. Does a 220V "Smart" Wifi pool timer with a Fireman's switch for the heater exist? One that can be synced/programmed via Google Home, for example. Thanks for any leads!

www.troublefreepool.com

 

[Rancho Cost-a-Lotta]

You had mentioned that you use the Sonoff to control your heater... I know you can wire a 110v device into it to turn it on/off at certain thresholds... how did you wire in your heater for controlling remotely?

Your heater has a fireman's switch that carries its own 24 volt power. When this circuit is opened, it turns off the heating function but other functions remain. When the circuit is closed, the heating function turns on. No external power should be applied to this circuit; it just needs to be opened and closed. The Sonoff TH16 does not have "dry" contacts. It passes the voltage powering the device to the contacts. To connect to the heater, the relay side needs to be converted from 120v to dry contacts. I used the OONO Power Relay Module between the Sonoff switch and the Fireman's switch.

With my heater, for external control, I turn on the heater to pool mode and set to max temp (104). The Sonoff switch then takes over control of the heating function. When switched back on, the heater resumes the call for heat to 104 degrees until switched back off.

Hopefully this makes sense. Let me know if you have any questions.

 

[chubrok]

Your heater has a fireman's switch that carries its own 24 volt power. When this circuit is opened, it turns off the heating function but other functions remain. When the circuit is closed, the heating function turns on. No external power should be applied to this circuit; it just needs to be opened and closed. The Sonoff TH16 does not have "dry" contacts. It passes the voltage powering the device to the contacts. To connect to the heater, the relay side needs to be converted from 120v to dry contacts. I used the OONO Power Relay Module between the Sonoff switch and the Fireman's switch.

With my heater, for external control, I turn on the heater to pool mode and set to max temp (104). The Sonoff switch then takes over control of the heating function. When switched back on, the heater resumes the call for heat to 104 degrees until switched back off.

Hopefully this makes sense. Let me know if you have any questions.

Thank you.. This makes perfect sense. I ordered the same relay module.. it should arrive today. I'll let you know how it goes...