Hey everyone,
Just wanted to share a temp sensor that's pretty new: the BleBox tempSensor DIN.
It's a DIN-mounted, 4-channel WiFi device. The main thing that makes it stand out is the probe length – you can connect up to 4 separate probes, each one up to 100 meters long. Seems ideal for large properties, monitoring pools, outbuildings, or underfloor heating systems from one spot.
You can check it out here:
Hmm. That's quite expensive for a WiFi based device which allows you to connect a ds18b20...
Horses // courses
Well, with some ESP inside you get:
A device of this complexity, especially one that uses a radio module (WiFi) and connects to the mains (230V), must be certified according to several strict European Union directives. The testing, documentation, and use of compliant components required to pass these standards significantly contribute to the final price.
The primary EU certifications required are symbolized by the CE Marking and include compliance with:
Plus you get a webserver so you can connect to the device without the internet, mobile apps (Android, iOS) and a PC Windows app. And some more features 
Hi,
I wouldn't argue with any of that. The standard alexa market may take a bite. I'd suspect those who may have a need for temp measurement of this nature may either
(A) seek something non-wifi, or
(B) be savvy enough to go the DIY route.
Good luck, I hope you have many happy customers. Personally, I might have been tempted by a neatly packaged, din-mounted zigbee product. Maybe. If it had native hubitat drivers, which it doesn't look like it does.
But as it is, good luck, but...
A long read but it may be worth it
When people compare a professional building-automation module like the BleBox tempSensor DIN with a cheap Chinese board built around a cloned ESP8266, they usually focus only on the fact that “both read temperature.” In reality, they are completely different devices designed for completely different environments.
1. Made for 230V installations — with proper safety
The tempSensor is designed to be mounted in an electrical distribution board and powered directly from 230V. That requires correct creepage/clearance distances, certified high-voltage design, and components suitable for permanent installation inside an electrical cabinet.
2. Fire-resistant enclosure
The module uses a non-flammable, fire-resistant housing, which is essential for devices installed in breaker panels. Cheap modules usually have none of this — they use generic plastic that can melt or ignite under fault conditions.
3. Multiple high-efficiency switching converters (not a random low-cost supply)
Inside the tempSensor there are three high-efficiency isolated/DC-DC converters, each with a dedicated role (mains conversion, logic supply, 1-Wire bus power).
They’re designed to withstand surges, dips, brownouts, and to keep the module stable during disturbances.
Cheap clones rely on the cheapest possible, non-isolated supply solutions that are neither safe nor durable.
4. Proper galvanic isolation (critical for safety)
The device provides full galvanic isolation between the 230V side and the low-voltage bus.
This dramatically reduces shock risk — e.g., if a temperature probe’s insulation failed or moisture caused a conductive path, the high voltage wouldn’t reach the user or the bus side.
Clone boards have zero isolation. Everything is referenced to the mains.
5. Real support for long 1-Wire buses
Driving long 1-Wire lines (for example 4 Ă— 100 m) is not trivial. Long cables act as transmission lines, introducing:
The tempSensor includes signal shaping, timing conditioning, controlled current drive, and power-line voltage-drop compensation. This makes long-line installations stable.
Typical $3 modules are designed for short wires and often fail completely on long distances.
6. Surge and transient immunity
The module is tested for:
This is essential in real electrical installations full of inductive loads and switching spikes. Cheap boards are not tested and typically die the first time a spike appears.
7. Genuine DS18B20 sensors, not $1 counterfeits
tempSensor is engineered to work with original Maxim DS18B20 devices.
Most ultra-cheap probes contain clones with incorrect timing, unstable temperature readings, or ROM-code issues — which cause problems especially on long bus lines.
8. Mature firmware: secure communication, local logic, API, cloud
BleBox provides:
Clone modules run recycled firmware with no security or proper testing.
In short:
The BleBox tempSensor is a professional, isolated, surge-tested, fire-safe, long-distance 1-Wire module with proper power electronics and genuine sensors in mind.
A cloned ESP8266 board is just a hobby module — not a device suitable for building automation.
I'd already agreed with your claims of higher specs and certification.
However, that last comment from you is absolute rubbish. There are a huge number of hobbyists happily using esp8266's for temperature-related home automation. I'm also not so sure about your claims of "real ds18b20s" either.
I suspect what you're offering is a cloud-based, a powered wifi device. I'd already decided the device wasn't for me. Your continued efforts to dismiss existing solutions raises questions on integrity.
I'm definitely not one of your target customers, I'm afraid.
FYI WiFi devices don’t have to be cloud-based.
This one appears to have a local as well as remote interface (according to the manufacturer’s site).
Yeah, aware of that.
Check these comments out too.
Seems the hardware is solid, the software isn't. At least that was the general feeling within that other post.
Also, check out the reality behind the "long run" claims. I only had a quick look, but for lengths of longer than 15m, you need to "contact us".
So Christ knows what the actual costs are.
I think it's best I leave this, as it's probably coming across like I have some kind of personal issue with this product. Which I don't. Everything I've read about it sets off alarm bells for overpriced, pointless and lacking integrity. Of course people are free to make up their own mind, as always.
That post is 11 months old, I’m sure it’s possible the software has matured since then.
I don’t think anyone would dispute that this isn’t the product for you or anyone else handy enough to roll their own solution (including sourcing all the components, assembling/soldering etc.) who prioritizes the most inexpensive possible options.
But why do you keep calling into question the integrity of people who make or resell this device?
Because these statements are wildly misleading.
...Cheap clones...neither safe nor durable...
...galvanic isolation (critical for safety)...
Clone boards have zero isolation...
...Cheap boards are not tested and typically die the first time a spike appears...
...Genuine DS18B20 sensors...not $1 counterfeits**
...Most ultra-cheap probes contain...
...incorrect timing, unstable temperature readings, or ROM-code issues — which cause problems...
...Clone modules run recycled firmware with no security or proper testing...
...ESP8266 board is just a hobby module — not a device suitable for building automation...
I've had mine set up for years. No issues.
@djh_wolf This is an open thread and anyone may want to take a look. I do not reply strictly to you. It's a gneral informative reply made for those who may be interested in the product.
@Ultrasmart.pl : I think it is blatantly dishonest of you to NOT disclose that Ultrasmart.pl is in fact an affiliate of BleBox and resells their devices. As such, your post is ADVERTISEMENT and absolutely not a community message where you "just wanted to share ...".
I have purchased Hubitat devices and several other items from you before, and been a happy customer so far. But posting "advice" in the community forum and failing to disclose your direct commercial interest in selling BleBox devices is IMO a total no-go. Don't do that! For returning customers in the IoT space, your credibility is EVERYTHING!
As for the BleBox devices themselves, I just took a couple of them out of mothball. The software is still a mess, official installation guide still wants you to use their mobile app, and the app still pushes you to create a user cloud account. Hard pass. Again.
UPDATE from this weekend (November 2025).
Unfortunately, the software has still not improved, and there is no sign BleBox has decided to cater to a developer/tinkerer community.
I took a couple of units out of mothball. Here is an updated experience.
1.) The official installation guide still pushes you to use the companion app on Android or iOS. There is no local web interface that exposes the full capabilities of the devices.
2.) The HTTP interface for local operation has seemingly not returned. So the devices have a web server, but still can't be operated in solo mode from a browser.
3.) The API of the device is still not fully published.
4.) The community drivers available do not work out of the box with dual-relay devices. I am sure some tinkering with the Groovy code can fix the problem, but essentially that means the breaking API changes have not been reverted. I have better uses for my time than spending hours fixing this when a SONOFF Zigbee device for 15 EUR will solve the problem.
5.) I understand the OP cares about what is or isn't a "suitable device for building automation". If you want to build automations using BleBox’s own cloud services and stray off your offline-friendly Hubitat ecosystem, I’m sure you’ll be happy. BleBox is still pushing people HARD into their app and ecosystem, making this a cloud-first product. Personally, that is NOT why I deployed a Hubitat device. I want my units to work offline with no data scraping and no external dependencies. I want stable APIs so the community drivers keep working (second best would be a vendor-supplied driver that’s kept up to date — we don’t have this, and I don’t see the point in trying to keep it updated either).
So, after a few hours tinkering with this, my verdict is still: PASS!
Hardware is sound. Software ecosystem still feels pretty terrible. Mobile app with cloud connection still part of the official setup; cloud account required for full functionality. Local API exists but with no official guarantee that they won’t break it again on a whim. Not tinker-friendly if you ask me.
Thanks for sharing your experience with the device.
@Ultrasmart.pl has been a partner with Hubitat for years. They don’t exactly try to hide the fact that they sell Hubitat hubs and other home automation gear in the EU.
That's not what I meant, @marktheknife 
I meant that they are not disclosing that they are a BleBox affiliate, and have a direct interest in selling BleBox devices.
I purchased several Hubitat devices from them, some of my own BleBox devices, and several Zigbee devices. It's great that they are selling and promoting Hubitat. But in this case they wrote a post that poses as simple community-based advice, along the lines of "hey check out this new BleBox stuff because they're really great - and also the primary competitor sucks and isn't a reliable alternative". I am not a moderator and I am not saying they can't promote their products here. That's not for me to decide. My call was for them to be open and honest about their commercial interest in actively promoting BleBox.
I feel the Hubitat community thrives on openness, honesty and tinker-friendly hardware. I think most of us have chosen Hubitat specifically because it's free of external dependencies. People can only make informed choices if they are exactly that: informed.
I did not write that. Instead I wrote: The main thing that makes it stand out is the probe length – you can connect up to 4 separate probes, each one up to 100 meters long .
Where did I mention a name of any competitor?
I also don't try to hide who I am. I'm sure ultrasmart(dot)pl rings a bell and it's not difficult to figure it sounds like an address.
If you know the device's IP address then you get this:
It means that if you want to have access to 12 month history and get notifications on your phone you need to register. What's wrong with that?
Regarding the integration - It will be polished. I will work on that.
You absolutely 100% did alude to the primary competitor being unreliable, untested... Even potentially dangerous... Etc.
This whole thread is really bad crack, and due to the content, it's heading into argumentative waters.
What are you talking about? I only mentioned:
"cheap Chinese board built around a cloned ESP8266"
If that is, in your opinion, a primary competitor of Blebox then good luck with your projects.
See my post above.
As I said some time ago, good luck with the product.
Download the Hubitat app
