...with Arduino and a small OLED-Display!
You may download my complete archive (free) with (Eagle-)schematic, -board, drill-file+Toner-Direct + fotos and Arduino-sketch @:
https://www.nlohrmann.de/download/TSYS01-Module_0,1gC_with-OLED_nl.zip
Enjoy!!!

Maximilian | April 6, 2020

Seems to be a good and accurate sensor

For SHT35-D (Digital) Humidity & Temperature Sensor

I already had various different sensors before which had self-heating issues (up to +2°C to high), 'bad' accuracy (+/-0.5°C and lots of % humidity deviation), and all deviated to each other. This sensor finally has a very good accuracy for temperature and humidity (if i trust the data sheet). The sensor produces very stable values and doesn't fluctuate. It reacts fast to any changes (e.g. if i open the window). I have no calibrated measuring instruments, but compared to a 'good' thermometer/hygrometer this sensor shows (almost) identical values. The available library makes it very easy to use the sensor.

Russell | Jan. 23, 2020

Excellent

For Si7051 ±0.1°C (max) Digital Temperature Sensor

Well made, fast shipping and well packaged.

I wanted to use these to calibrate a bunch of DS18B20 1-wire waterproof sensors that were within spec (+/- 0.5C) but as a group spread over a ~1C range and they're doing the trick nicely.

I used the supplied library to add these to esphome as a custom component (files on github: https://github.com/esphome/feature-requests/issues/573) so I have a small battery driven device (ESP32 with integral battery) that I can plonk anywhere.

Once in a while they give an outlier reading (-6C) but that's easy to filter out.

Jan | Aug. 11, 2019

High quality sensor board

For SHT31-D (Digital) Humidity & Temperature Sensor

This is a well thought-out and tiny sensor (SHT31-D) breakout board. There are a few things which make this breakout stand out among the garden-variety-ebay breakouts:

* Design: the sensor piece is air-gapped from the surrounding board (as much as possible).
* Info: all the essential information is printed directly on the board (e.g. I2C addresses).
* Supplied filter cap!

Especially the filter cap was a big deal for me, since it was intended to go (and actually is) outdoors.

The SHT31-D itself is a pretty good sensor, especially for battery-powered projects: very very low power consumption in sleep/idle (0.2uA, confirmed), auto-fallback to this mode when measuring (so no hassle in putting to sleep), very simple formulas to get the actual temp/humidity values from the reported data.

All of this, together the quality of the build, definitely make this board worth the price for any "DIY environmental sensor" project.

Harlan | Feb. 22, 2019

Nice board, good soldering, quick shipping.

For SHT31-ARP Analog Humidity and Temperature Sensor

The summary says it all. The board is well designed and, if you opt for the soldered headers, they are well done. Wired up, I've compared the results to a calibrated RTD that has considerable cost associated with it and my numbers are right on target. I have experience with the Sensirion chips and know their value, but having this professionally installed on a board that I can easily wire up is fantastic.

Can't ask for more and I'll certainly order this again if I am in need of inexpensive, yet robust sensors.

Jeff | Nov. 19, 2018

Top-Quality Boards, Great Seller

For HDC1010 High Accuracy Humidity/Temperature Sensor

Purchased several of these HDC1010 boards and the design and fabrication quality is top notch. Packaging and shipment was professional and quick. Perfect to be able to evaluate these chips and the seller is great to work with. He's got more than the store itself shows and I'd suggest contacting him if there isn't exactly what you're looking for shown (or you're looking for something else). I'm looking forward to working with him again, perhaps for some custom work as well.

Jeff | Nov. 19, 2018

Highly Recommended Seller

For MAX30205 ±0.1°C Human Body Temperature Sensor

Normally I would just stick with the single review for both the products, but the product quality and service has been exceptional. Delivery time was very reasonable from the UK to California. If you don't see what you're looking for, drop him a line -- I discovered some boards of his that weren't listed on Tindie that are now on my "short list" for the next order. I will definitely be ordering from ClosedCube again.

Lorenzo | Nov. 5, 2018

Quick shipping (4 or 5 working days to Italy). The sensor is accurate yet quite stable, though I can't verify whether it matches the claimed ±0.1°C accuracy as I have no precision instrumentation to compare with. The response time is relatively slow (a few tens of seconds for a ~5 m/s airflow) when compared to thermistors or thermocouples, so I would not recommend it for applications like temperature control.

All in all, this breakout board is definitely the easiest way to embed a TSYS01 sensor in your DIY project.

Rui-Tang | July 9, 2018

GOOD!!

For TSYS01 ±0.1°C 24bit ADC Digital Temperature Sensor

GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!GOOD!!

Aidan | May 8, 2018

Just a note for say thanks for excellent service.

For TPS61221 Low Input (from 0.7V) Boost 3.3V Breakout

Fast delivery, high quality design and manufactoring at reasonable cost.
everything works as specified.

(Tindie wanted 100 chars - so here a few more)

Ross | Dec. 18, 2017

Very Accurate Sensor !

For SHT35-D (Digital) Humidity & Temperature Sensor

Now this really is a nice sensor, I have found it to be very accurate and fast !, I have compared this to many other sensors and find this one to be the best !, I particularly love the Permeable cap option which I bought to be able to use this in a protected but outdoor environment , Only sensor I have found with this option.
I highly recommend this sensor, and plan to purchase more !

Tzuwen | Aug. 30, 2017

GOOD

For ClosedCube SMD 2xSOT23-3/SOT23-6 Double-Sided PCBs

GOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOODGOOD

Robin | Aug. 11, 2017

Super breakout for the TPS61221

For TPS61221 Low Input (from 0.7V) Boost 3.3V Breakout

Nice little breakout board for the TPS61221 - works as specified, hight quality PCB, looks good! Thanks a lot!

Corban | Aug. 1, 2017

SIX stars!

For HDC1010 High Accuracy Humidity/Temperature Sensor

I am a total noob. I didn't own a soldering iron when I ordered these sensor ships. I reached out to ClosedCube asking how to adjust the I2C address so I could have two sensors on the same I2C bus, and explained I was a noob. The walked me through the process of de-soldering and re-soldering a tiny smd jumper. They could tell I was nervous, and so they included a bag of extra parts so I could practice before I tried it on the real thing.

The sensors arrived in less than a week - which impressed me, since I am in Western US. When they got here I used the practice parts for about two hours, and then I successfully mobed the smd jumper. It was a lot easier than I thought it would be.

I used the ClosedCube published Arduino library, and it worked perfectly. Super easy. This was my first time actually applying a new library, and it couldn't have been easier.

Now I have two chips on the same bus, and they work perfectly! I put them in a sealed bag, and within a couple minutes, the temperature readings were about .05 degrees Fahrenheit different, and the RH% was about .3% different - WELL within the published tolerances.

Product- 5 stars
Documentation- 5 stars
Shipping- 5 stars
Seller- 6 stars for going out of their way to help me succeed!

Antony | July 26, 2017

Accurate temperature measurement

For Si7051 ±0.1°C (max) Digital Temperature Sensor

Compact and accurate temperature sensor. Easy to interface with the provided example code.
The sensor doesn't even require calibration to reach this accuracy.

Marc | June 19, 2017

Unique combination for many applications

For ICS-40720 Ultra-Low Noise Analog Mic with Buzzer

The smallest form factor for a low noise microphone and buzzer in a single module I could find. Great for microphone arrays and small size projects who need an audio in and out.

Antony | Feb. 15, 2017

Excellent quality and fast delivery

For OPT3001 Digital Ambient Light Sensor Breakout

I used this breakout board to evaluate the TI OPT3001 sensor. The sensor is easy to use and the TI datasheet contains all the information required to program and operate the sensor. This handy little board saved me a lot of time.

Thomas | Dec. 7, 2016

Great Product, Great Price.

For HDC1010 High Accuracy Humidity/Temperature Sensor

The HDC1010 High Accuracy Humidity/Temperature Sensor Board is just the perfect solution to our research needs. We do temperature and humidity logging in various cave environments. We needed a highly accurate and dependable sensor. The HDC1010 Chip from Texas Instruments is perfect for the job, but is way too small for us to place in a circuit. Closed Cube has taken care of all the fine detail work by mounting this sensor on a practical sized circuit board. The board is well designed and very durable. The code provided by Closed Cube is easy to understand and implement. We plan to purchase more devices in the future.

Nikolay | Nov. 24, 2016

Si7051 ±0.1°C (max) Digital Temperature Sensor

For Si7051 ±0.1°C (max) Digital Temperature Sensor

I received the board in proper anti-static packaging The PCB has all the important information you need - working voltage, pinout and I2C address. It's small, compact but still easy to use with standard 0.1" pitch pins. Communication with the seller was nice. He answered all of my questions.

Reinhard | Aug. 18, 2016

Good product for reasonable price!!

For Duo DS2413 1-Wire Dual Channel Addressable Switch

Good product for reasonable price!!
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Mike | May 30, 2016

Excellent humidity/temperature sensor

For HDC1080 High Accuracy Humidity/Temperature Sensor

I needed an inexpensive humidity sensor to connect to my arduino and found this one that looked nice. The board is well designed, nice and small and comes with links to the data sheet and arduino library. Because of this I had it working in only a few minutes. I can recommend this seller and would buy more from him in the future.

Mike

Mark | May 2, 2016

All OK

For LMT70 ±0.1°C Precision Analog Temperature Sensor

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Works as expected, would buy it again. I am happy.
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Peter | Dec. 31, 2015

Works well, easy to use, consistent results

For SHT30 Analog Humidity & Temperature Sensor Module

Bought this board to become the basis for a weather station / environmental conditions logger. Works well, and seems to track the existing commercial weather station units I have pretty closely and consistently (as far as humidity and temperature are concerned). Was very easy to get started with the supplied Arduino library. Perfect board to get if you wanted to get started with these sensors!