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CQRobot Temperature and Humidity Sensor is based upon the Sensirion SHT31-DIS-F sensor IC. Thanks to Sensirion's CMOSens technology, highly integrated capacitive humidity sensing components and band-gap temperature sensing components, the SHT31 offers high reliability and long-term stability with low power consumption, fast response and strong anti-interference ability. The sensor supports I2C communication, and is compatible with 3.3V/5V controllers. It is easy to achieve precise and high-reliability temperature and humidity sensing for urban environment monitoring, intelligent buildings, industrial automation, smart home and other Internet of Things applications.
Note: For technical support, please refer to CQRobot Wiki to get the test code, SKU: CQRSHT31FA.
SPECIFICATIONS
Sensor Specifications
- Operating Voltage: 2.15V to 5.5V
- Operating Current: Less Than 1.5mA
- Humidity Detection Range: 0%RH to 100%RH
- Humidity Accuracy: Plus/Minus 2%RH@0%RH to 100%RH(at 25 Degree Celsius)
- Temperature Detection Range: -40 Degree Celsius to 125 Degree Celsius
- Temperature Accuracy: Plus/Minus 0.2 Degree Celsius @0 Degree Celsius to 90 Degree Celsius (Typical)
- Communication: I2C (JST PA SMT 4-Pin interface to 2.54mm pitch pin header interface)
- Outline Dimension: 22.36mm * 31.35mm
- Mounting Hole Size: 3mm
- Mounting Hole Pitch: 15mm
Cable Specifications
- Cable Specifications: 22AWG
- Material: Silicone
- Withstand Voltage: Less Than 50V
- Withstand Current: Less Than 1000MA
- Length: 21cm
- Line Sequence: Black negative power supply, Red positive power supply, Green-SDA, Blue-SDA
DISTRIBUTION LIST
1 * SHT31 Temperature and Humidity Sensor
1 * JST 4-Pin Cable
Critic
Reviewed in the United States on September 29, 2024
I specifically searched for the SHT31 F, which has the environmental shield because I want to use it in a dryer. The F part is more expensive and a separate part number from sensirion, and CQrobot only has one model. I therefore must conclude that they changed their product to a lower cost part which does not correspond to the Amazon photos or description. They are taking a chance hoping customers won't notice. This is not good.
Dylan Sellers
Reviewed in the United States on March 5, 2023
I use this for my grow tent to automate the exhaust and humidifier and it works amazing. It has precise humidity and temp readings and updates extremally fast. Only wish I could make the wires longer without it losing data.
Mr AJP
Reviewed in the United Kingdom on March 16, 2022
I had a failed Youshiko YC9391 outdoor weather sensor which had stopped reporting the outdoor temperature and humidity. After tearing it apart it turned out it was using a daughterboard using the Sensirion SHT31 sensor with a custom membrane fitted. The factory Youshiko board was covered in corrosion and one of the cables had literally rotted away.I ordered this board to see if I could recover it as it was the only one with the membrane fitted, and the answer was yes (when the i2c address was 0x44 anyway!)Although the sensor and membrane are IP67 rated the PCB is not prepared for the elements. I coated this CQRobot Ocean board in MG 422C Conformal Coating so that the entire board should stand up to water better than the old Youshiko board had (it had rotted away and corroded the wiring in the cables).For connecting the cables I snipped the female connectors off and then used Dex BT spec gel crimps with dialectric grease inside to connect to the relevant trimmed PCB cables so hopefully they'll last a while.Then I just used a custom 3d printed part to hold the cables and new board in place under the fan as the orientation was different.As can be seen in the screenshots the Youshiko screen is now fully reporting the temperature and humidity as detected via this CQRobot Ocean board.I'd also tried using this connected to a Pi 3b and it worked fine in there connected up to the correct pins (3.3v, Gnd, SDA. & SCL) using Python demo code which reported the temperature in celsius, fahrenheit and relative humidity.Fingers crossed this will hold up to the elements outside but overall I'm very happy and it's a well made board.
Jane Fairchild
Reviewed in the United States on May 31, 2021
CQRobot products have always worked out well for me, and this temperature and humidity sensor is no exception. Module arrives in an electrostatic pouch in a padded packaging. The solder joints are all clean, and everything looks good.
T.L.
Reviewed in the United States on March 15, 2021
I am really blown away by the sensor used for this board -- it's so much better than some of the cheaper temperature sensors I've used in the past especially with how quickly it updates for temperature changes in the environment.The sensor itself came well packaged in an anti static bag in a case which really impressed me. The wiki is fully featured and really goes into depth for the product as well. Going from container to fully functioning only took me a few minutes which for a mostly novice like myself really impressed me as some other sensors I've used in the past have taken a lot of guesswork and head scratching for me to take that leap. The measurements seem very accurate so I'll be using this in projects where I need to measure temperature differences quickly and accurately. I'd highly recommend this sensor and this brand as well given the quality of their documentation and their packaging.
InspecteurGadget
Reviewed in France on September 6, 2020
CQRobot c'est de grande qualité. Rien qu'au soin pour le packaging on a tout de suite cette impression. Un des trucs vraiment appréciable, c'est aussi les câbles qui sont fournis et qui permettent d'utiliser le module directement sur un Arduino type Arduino Nano par exemple.Vous débuter ? Pas de soucis, là encore CQRobot à pensé à tout. Leur site est contient tout un tas de tutoriels super bien fait qui explique tout. Allez y faire un tour et vous serez convaincus.A l'utilisation là aussi c'est super simple, il suffit de brancher le module (+, - et sensor) sur un Arduino et d’exécuter le script trouvé sur le site pour que ça fonctionne.Je n'ai essayé que sur Arduino, mais je pense que ça fonctionne nickel sur Raspberry PI aussi (les scripts sont aussi disponibles sur leur site Internet.)Une super marque et des modules de qualité.
Alfy
Reviewed in Germany on September 29, 2020
Für meine Projekte nutze ich bislang den AM2302, der jedoch teils heftige Toleranzen aufwiest und auch nur mühsam auf Genauigkeit zu selektieren ist. Von den sechs damals gekauften waren letztendlich nur drei einigermaßen brauchbar. So relativiert sich auch der recht hohe Preis des SHT31-Sensors.Das kleine Board mit einem SHT31 als Sensor ist schon fertig konfektioniert und kann sofort ohne weitere Maßnahmen angeschlossen und in Betrieb genommen werden. Das Board ist sehr sauber aufgebaut und optisch mängelfrei. Der Fertigungsstandard ist eindeutig Oberklasse und hebt sich wohltuend von billig gefertigten Bords ab, selbst die beiliegenden Kabel sind silikonummantelt und werden als nettes Gimmick noch mit einem praktischen Kabelbinder zusammengehalten.Sketchs für den Arduino finden sich zur Genüge, so dass ich auf einem Breadboard lediglich die Leitungen für ein kleines Display anschließen brauchte. Wie erwartet funktioniert das ganze fehlerfrei. Wenn die Angaben des Herstellers zur Genauigkeit stimmen, kann man sich auf diese Weise eine hochpräzise Messstation für Luftfeuchtigkeit und Temperatur zusammenbauen. In Verbindung mit einem Raspi oder einem ESP32 kann man das Ganze auch über Wlan laufen lassen. Mein Ziel ist es aber, den Sensor mit einem LoRaWan-Modul zu koppeln, was ich aber erst im Winter in Angriff nehmen werde.
Patrick Regan
Reviewed in the United States on September 18, 2020
I used this sensor on the arduino. To test it I downloaded the code that is provided on the wiki for which a link is provided on the Amazon.com listing for this product. For some reason, I had to modify the cpp and header file. Specifically, parts of the code used the class name DFRobot_SHT3x and other parts used just SHT3x. So I changed all occurrences of the former to use that latter. Finally, a lot of the ino file was commented out so I made sure to uncomment the parts that needed to be run. After this and after hooking up the hardware, I was able to get the sensor to read temp and humidity. I tested it by holding the sensor up to a hot cup of coffee and found that the temperature increased as you would expect.
R. Eye
Reviewed in the United States on October 5, 2020
This CQRobot Ocean: Temperature and Humidity Sensor Compatible with Raspberry Pi will be the perfect addition to my Pi Zero W to remotely monitor the environment in my basement. I will be able to remotely query the Pi and get the current condition without needing to travel to the far end of the house. I've been worried about the temperature and humidity down there and this will fit nicely within the automation I am proposing for the house.
GG
Reviewed in France on October 30, 2020
Ce capteur est arrivé dans un packaging soigné, dans une petite boite en plastique transparent. A première vue, le produit est bien fait, les soudures sont propres.C’est un capteur utilisable avec Arduino, Raspberry et toute les cartes dérivées. CQRobot possède un site internet sur lequel il est détaillé le fonctionnement de ce capteur et le déroulement a suivre pour sa mise en service. C’est donc accessible à tous ! Débutants et confirmés !L’utilisation est très simple, il suffit de brancher le + sur le +, le - sur le - et le signal sur une pin de votre microcontroleur. Il existe également un script à télécharger sur le site de CQRobot pour utiliser avec un Arduino. Il faut le télécharger et le charger puis le tour est joué !C’est un capteur qui mesure des températures sur une plage assez importante : -40 à 125 degrés. Par contre la précision est de 0.2 degrés donc c’est pas un capteur qui doit être utilisé pour des mesures dans un laboratoire. De même pour la précision de la mesure du taux d’humidité, celui-ci est de 2%. Correct pour une acquisition rapide de mesure dans une pièce mais a éviter pour faire de la régulation.
Infinity
Reviewed in Germany on October 25, 2020
Der Temperatur- und Feuchtigkeitssensor für Arduino oder andere Mikrocontroller baut auf einem SHT31 Sensor auf. Der ist von einem normalen Hobbyisten nicht selber einzulöten, daher braucht man eine Lösung auf Platine. Diese Lösung hier ist sogar inklusive der Schlitze in der Platine umgesetzt, welche ein genaueres Lesen der Umgebungstemp. erlaubt und sich nicht von evtl. Platinenerwärmungen beeinflussen lässt (wobei das bei genau dieser Platine, auf der sich ja keine anderen aktiven Bauteile befinden, egal sein dürfte).Der aufgebrachte JST Stecker ist für die Spannungsversorgung (sowohl für 3,3V als auch 5V Systeme geeignet) und die I2C Datenleitungen gedacht. Positiv kann erwähnt werden, dass sich die I2C Adresse per Schalter ändern lässt, so dass man zwei dieser Sensoren parallel an den I2C Bus legen und getrennt voneinander abfragen kann.Die Kabel sind von guter Qualität und sehr flexibel.Preislich könnte das Modul etwas günstiger sein, dafür erhält man hier allerdings eine gut konzipierte Platine inkl. Adressumschaltung und guter Kabelqualität... und manchmal machen diese vermeintlichen Kleinigkeiten einen wichtigen Unterschied. Von mir: Daumen hoch!
S.
Reviewed in the United States on October 1, 2020
The board comes in a anti-static bag with foam over the jumpers, inside a hard plastic case. Considering most boards I've gotten as far back as I can remember are packed just in the anti-static, shoved in a bubble envelope and shipped off, this speaks highly of the company. I found the board very quick to respond both when I breathed on it and moved it from desktop to the palm of my hand and back. Probably less than 10 seconds elapsed and I saw movement on either/or both sensors.Honestly, the CQRobot wiki was a bit over my head (or rather TL;DR) and after an hour or so of not getting it to compile I gave up. I loaded the Adafruit SHT31 library, fired up the Adafruit test sketch, changed a "44" to "45" and I was off and running. While probably not a real burn-in test, I let it run for a couple hours and all was well. The hardware is there, the offered software is not for a novice, and I'll be getting more of these as I build my printer filament storage array.
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