AZDelivery3 x GY-21 HTU21 Humidity and Temperature Sensor Module SHT21 with I2C Interface compatible with Arduino and Raspberry Pi including E-Book!

so I have connected this to a RPi zero w, and from what i can tell from some quick googling - you can read the data raw using address's or you can use the ardunio library (see below). I chose the latter. The sensor connects to i2c, and such i can use the same 2 data pins for multiple sensors and interfaces, like the bme280, an alternative to this.Basically its just as good but i didnt even need to call the 0x40 address using the library. Code is SOOO simple gona post it below. After soldering the header pins and plugging in, it just worked. No hassle.Also AZDelivery emailed me a detailed datasheet and other documents relating to the sensor promptly without me even asking. Nice touch.sudo pip3 install adafruit-circuitpython-htu21dread_htu.py:import timeimport boardimport busiofrom adafruit_htu21d import HTU21D# Create library object using our Bus I2C porti2c = busio.I2C(board.SCL, board.SDA)sensor = HTU21D(i2c)while True: print("\nTemperature: %0.1f C" % sensor.temperature) print("Humidity: %0.1f %%" % sensor.relative_humidity) time.sleep(2)

The sensor seems to be providing inaccurate temperature and humidity readings. I'm using Adafruit's Python libraries to read the sensor data. After logging readings over the course of a day and comparing against readings from 2 other temperature and humidity monitors the discrepancy is too high (+-5C / +- 16% avg.). I may have a faulty unit so I will order another one and update this review if necessary.

Ich habe jetzt seit einem knappen Jahr für eine Taupunkt-Lüftersteuerung mehrere dieser Sensoren rund um die Uhr an Arduinos und bin sehr zufrieden.

Kortet är lätt att sätta upp tillsamans med ESP32 och ger bra värden för luftfuktighet och temperatur. Den är ganska snabb att reagera på både temperaturförändringar och ändring i luftfuktighet även om det inte är momentant. Temperaturen verkar stämma bra med andra termometrar. Luftfuktigheten hade jag inget att jämföra med men ser ingen orsak att tvivla på resultatet. Snabb leverans.

Capteur température - humidité qui a l'avantage sur un BME280 de ne pas être détruit s'il se trouve dans le brouillard.Le BME280 mesure aussi la pression, c'est un avantage, mais il faut le protéger des conditions extrêmes.

Bisogna avere un po' di pazienza per trovare le librerie giuste per farli funzionare correttamente ma una volta fatto questo vanno benone, semplici da collegare e molto precisi.

El envío ha sido muy rápido, y lo detecta en I2c 0x40. Le quito una estrella, porque marca casi 4º de más.