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Ohmtech.io

186 orders since Mar 05, 2019

Berlin, Berlin, Germany

Ships from Germany.

Custom Work Available

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Overall Rating:

Review Breakdown

5
6 4
6 3
0 2
0 1
0

Average Ratings

Product: (4.75)

Documentation: (4.50)

Shipping: (4.75)

Communication: (4.92)

All Reviews

Stefan | June 28, 2021

Fine little thing

For uThing::VOC Air Quality USB dongle

It is working like described, but I didn't change anything so far nor did I integrated it in my HA.
The messured values seem to be ok, no runaways noticed so far.
Documentation is -as I see- complete.
Nice feature is the online dashboard. You can read the Sensor without software installed. Its a bit hidden in the documentation..
Well, one negative:
the Firmware wasn't the newest.
I like the sensor and its handling. Plug'n'Play.
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Response from Ohmtech.io | July 1, 2021
Hi Stefan,
Thanks for your review! Good to know that you found interesting the online dashboard.
Regarding the FW version: which version does the devices output? v1.2.5 is the latest one for the first revision of Hardware, new boards (rev.2) should have v.1.3.2 (I should probably have changed the mayor version in order to identify the hardware revision, sorry for the confusion).
In any case, you can find the instructions for firmware update here: https://docs.ohmtech.io/uThingVOC/fwUpdate/ and the binary releases here: https://github.com/ohmtech-io/uThingVOC/releases

All the best,
Daniel.

Stephen | March 3, 2021

Great little device that does exactly what it says it will

For uThing::VOC Air Quality USB dongle

We've been using these for collecting environment information for months without any issues. A small script and an openTSDB instance is all it takes to do things like alert on heat and humidity near server cabinets, and display environment trends over time in grafana.

I'm a software engineer and not so good with electrical engineering, so this kind of hackable-but-complete product is really useful! The documentation is clear and Daniel has also been super-responsive to any questions I sent his way.

John | Jan. 16, 2021

Neat tool

For uThing::VOC Air Quality USB dongle

I ordered this last year and it arrived in the USA recently, after a very lengthy delay (I was warned, so it was expected).

This is a very nice little product with a simple serial readout interface. I verified higher IAC and VOC readings by sticking some solvent underneath it and watching the numbers go up while I let it run. I have it hooked up to my Raspberry Pi and am looking forward to making some nice dashboards for it! Thanks for a nice little product, I hope you make (and sell) more of them.
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Response from Ohmtech.io | Jan. 25, 2021
Thanks for your feedback John! We are happy to hear that you find it useful. Thanks for understanding the shipping delay. Unfortunately due to the COVID situation, shipping times and components supply issues are out of our hands, lets hope that things will get better soon.
Stay healthy!
Daniel.

Christian | Sept. 25, 2020

Works perfectly

For uThing::VOC Air Quality USB dongle

Well designed and manufactured, perfect for prototyping.
Although on older (Win7 and similar) machines you still have to write the reg file to make it work, which could be provided, it just works from that point on and the interface is quite clean.
The standard protocol is quite clean and the three formatting options seem more than enough for getting stuff going.
I havent gotten into the firmware yet, but the whole device is designed with "hackability" in mind, so I am looking forward to that!

Thank you for making this thing.
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Response from Ohmtech.io | Oct. 1, 2020
Thanks for your feedback Christian!

Sampsa | Aug. 20, 2020

Works straight out of box, right level of integration

For uThing::VOC Air Quality USB dongle

Works straight out of box, right level of integration. Just cat /dev/acm0 and enjoy json data. Pleasurable simple sensor system :>
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Response from Ohmtech.io | Aug. 20, 2020
Thanks for your feedback Sampsa!

Daniel | Nov. 4, 2019

Great device to quickly get started measuring air quality

For uThing::VOC Air Quality USB dongle

Since I live in a densely populated area, I wanted to get a feel for the local air quality and possibly invest in an air filter if the data looked bad. I ran across some nice guides using this dongle and purchased it to use with my Raspberry Pi 3.
The data is extremely easy to read requiring just a few lines of Python. It enumerates as a serial port that sends updated measurements every ~2 seconds.
The big seller of the sensor is its air quality index. It's proprietary and Bosch doesn't tell you the formula in their datasheet but it's pretty useful for getting a quick read of how all the measurements equate to the air around it!
Check my blog for a more detailed write up:
https://technicallydeclined.com/bme-680-voc-sensor-long-term-review/

Steve | Oct. 9, 2019

Informative product

For uThing::VOC Air Quality USB dongle

Great device to measure air quality levels. Inexpensive and could create a fun project. I have 3 sometimes 4 monitoring the air quality around the house. A great way to re-purpose an old computer to be an air quality monitor station.

Stephen | July 31, 2019

Does not work on raspberry pi 3 buster

For uThing::VOC Air Quality USB dongle

It is a great little ‘thing’, works perfectly with my Ubuntu laptop, works fine with ubuntu mate on raspberry pi (though mate on raspberry pi is very sluggish and not really an option) but I cannot get it to work on the same pi running Buster. I get one line of readout then multiple messages of “invalid option” until it just stops altogether?????
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Response from Ohmtech.io | Aug. 11, 2020
Dear Stephen,
Thanks again for your comment. There was an issue with the older firmware (boards shipped previous to March 2020) and some Linux distributions, caused by specifically the ModemManager service which takes over any newly connected serial port. The new firmware fixes that and we've found that it plays well with Windows, Linux and OSX. The updated documentation along with instructions to update the firmware can be found here:
https://docs.ohmtech.io

Jorge Iii | June 7, 2019

Amazingly easy to integrate: totally libre design

For uThing::VOC Air Quality USB dongle

It worked out of the box. Ohmtech.io is completely responsive to customers, always there for support. They shipped the product ASAP! The documentation was very complete and easy to understand, even if it's a bit like reading shampoo instructions as you just plug in and point to /dev/ttyACMnn in Linux (Fedora 30 and with my Raspberry Pi). Readings and sensors seem to be very accurate according to my readings, specially the Bosch IAQ. Completely recommend.

Jan | April 30, 2019

A nifty little sensor

For uThing::VOC Air Quality USB dongle

This is a professional quality device, and was delivered quite quickly.
It works very well, precisely as described in the (quite detailed and well written) documentation online. The firmware is stable, simple to interact with and functional.
Overall, this is an excellent device to use, if the use case (USB attached indoor environment sensor) fits your requirements! If in doubt, have a look at the pdf documentation, it describes the functionality quite thoroughly.

Thomas | April 17, 2019

Works like it should, but no documentation

For uThing::VOC Air Quality USB dongle

This is a really cool sensor chip! It’s quite easy to get started with since it’s USB and sends data in high level formats like json.
Still it just comes as a chip in an anti static bag so you will need to search the Internet for information on how to use it.
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Response from Ohmtech.io | April 17, 2019
Hi Thomas,
Thanks for supporting this project and for the review :)
Have you checked the "Datasheet" file (link below)? There it's detailed documentation about how to use it.
Please let me know if there is any information missing and I'll add it.
All the best,
Daniel.

Klaus | March 28, 2019

Works like a charm!

For uThing::VOC Air Quality USB dongle

I ordered the item just to play around with it and to make some first steps in the area of air quality measurement.
Ordering and shipment was, simple, straightforward and quick.
The product itself works like a charm, just as described in the documentation. I have used it with my Linux computer, a Rasperry Pi and a Windows 7 machine. The connection over the virtual serial port is reliable and without any issues.
In the beginning, I was not sure how to interpret the "IAQ Accuracy" data item. But there are documentation files for the BOSCH BME 680 sensor online that did answer my question.
So far, I did not change the firmware, so can't say anything about that.
All in all, I am very happy with the uThing::VOC, definitely recommended!
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