I made two of those floating boxes, one for the hot tub and one for the pool skimmer. One I drilled out a little on the large size, the other I drilled a nearly exact fit hole for the probe, sealed both up with silicone gasket maker. The larger-holed box ended up leaking through the sealant and killed the sensor. I think the probe could wiggle around in the hole a little bit and eventually wore a hole in the sealant.
The exact-fit box is still going strong 
FWIW, I’ve found a great easy solution for monitoring multiple thermometers at once (including pool/spa sensors). For less than $100, I got the Ambient Weather TX-3107 floating pool sensor bundled with the WS-8482 wifi weather station. The sensor broadcasts about 200 feet from my pool to the weather station in my house, which then connects to wifi. Then there’s a 3rd party smart app which integrates Ambient Weather with Smartthings. I set it up on ActionTiles and now I can see my pool temperature on my dashboard. It’s great! Cheap! And pretty easy to set up!
My Fibaro died, so I cannot figure out another solution at this point. Anyone using a different sensor? I dont really have power to pull from, so it needs to be battery. I maybe can use a low voltage device.
I use a Fibaro door sensor ( the older one) with a remote temperature sensor to monitor a freezer.
If you can find one on eBay you could put that in a waterproof box.
Thats the solution I was using, but mine died. Cant find a replacement
Personally I went with the La Crosse solution (eg https://www.amazon.com/gp/product/B06ZYJ5L5B) – it’s a probe (and a basic external temperature as a bonus) + wifi based hub reporting to lacrossealertsmobile.com. The latter can easily be hooked up via webhooks to other systems (Alexa+Google Assistant in my case). Had it outside measuring the tub temperature every ~5 minutes for the last 6 months.
For the people using the sonoff th16, I would love to see pics on how its setup, its hard wired right?
Are you able to pull the data into anything that can be consumed by ST?
I would think if it can get into IFTTT then it can get into ST.
In my case I just did Alexa/Google Home, but theoretically yes, you can simply hook whatever you want to that AlertsMobile API that powers their website and app, it’s a very simple JSON output. Having said that, it’s an “undocumented feature”, so who knows how long it’d last (beyond running strong for like 7+ years up till now…).
Do you have any sample or format that could assist?
Was going to write something up - but here’s a quick sample:
{
“device0”: {
“success”: true,
“device_type”: “TX60”,
“obs”: [
{
“device_id”: “0001G31FA1B23FA1”,
“device_type”: “TX60”,
“u_timestamp”: “1582178094”,
“ambient_temp”: “52.4”,
“probe_temp”: “58.1”,
“humidity”: “80”,
“linkquality”: “100”,
“lowbattery”: “0”,
“success”: “9”,
“s_interval”: “99”,
“timestamp”: “2/19/2020 9:54 PM”,
“utctime”: 1582178094
}
],
“alerts”: {
“miss”: {
“id”: “501703”,
“alert_type”: “miss”,
“s_id”: “0001G31FA1B23FA1”,
“max”: “-100”,
“min”: “120”,
“wet”: “0”,
“alert_id”: “1”,
“phone”: “”,
“email”: “yes”,
“state”: null
},
“batt”: {
“id”: “501704”,
“alert_type”: “batt”,
“s_id”: “0001G31FA1B23FA1”,
“max”: “-100”,
“min”: “-100”,
“wet”: “0”,
“alert_id”: “1”,
“phone”: “”,
“email”: “yes”,
“state”: null
}
},
“ispws”: 0,
“unit”: {
“temp”: “°F”,
“temp2”: “°F”,
“rh”: “%”
},
“device_id”: “0001G31FA1B23FA1”,
“expired”: “1”
}
}
So is that the json string that comes in the webhook that can be ingested into IFTTT?
Or is that what you can pull into ST?
I get mine on Friday to try out.
I guess I can use webcore to GET the json and then response.probe_temp.
What is the URL?
Yes, you’d have to do a pull (get) on the URL (API) to pull this info down when needed.
I did my implementation via a chatbot that hits a custom glitch.com app (was a good excuse to test them) – I pull temp, probe temp, humidity, timestamp, and calculate the delay in minutes off the latter. This way, whenever I ask for it, I get my Alexa and Google Home devices reply with {temp} outside, {probe} water, {humidity}% humidity, as of {delay}.
The URL I got off the mobile app you will install to enable the bridge - when you “register” it via the app, you will be given your unique bride id, so the URL will look something like this: laxservices/device_info.php?&limit=1&timezone=8&metric=0&deviceid=XYZ
Ill post more details later, but I got this working with webcore and even got it into action tiles.
Ds1820b on Amazon with Smart implant fibaro and the DH https://community.smartthings.com/u/ovidiu.pruteanu
The best solution
I use a d1 mini flashed with Tasmota and a ds1820. Works well with my own or various other tasmota integrations.
Not sure how to start a new thread, but I need to monitor 4-250 gallon wine tank temperatures using Z-Wave Plus. Any ideas? Internal to the tanks, food grade, outside tanks, well covered???