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El sensor digital de temperatura y humedad DHT22 es un sensor combinado de temperatura y humedad de salida de señal digital calibrado, cuyos módulos específicos de aplicaciones capturan tecnología y tecnología digital de sensor de temperatura y humedad para garantizar que los productos tengan una alta fiabilidad y una excelente estabilidad a largo plazo.
No necesita resistencia de tracción. Simplemente conecta directamente a Arduino o ESP8266.
Descripción:
Chip principal: AM2302.
Rango de temperatura: -40 a 80 grados Celsius.
Precisión de medición de temperatura: +/- 0,5 ℃ grados Celsius.
Rango de medición de humedad: 0 ~ 100% HR
Precisión de medición de humedad: ± 2% HR
Consumo de energía ultrabajo
Sin componentes adicionales
Excelente estabilidad a largo plazo
Salida de señal digital de un solo camión, datos serie bidireccionales
Completamente intercambiable.
Transmisión de señal de larga distancia
Tamaño: 28 x 12 x 10 mm (largo / ancho / alto).
Diámetro del orificio del tornillo: 2,6 mm.
Peso: 4 g.
El paquete incluye:
2 módulos digitales de sensor de temperatura DHT22/AM2302.
2 cables DuPont
John Romesburg
Comentado en los Estados Unidos el 29 de enero de 2025
Arrived promptly and work as advertised with my Pi!!
Outdoors guy
Comentado en los Estados Unidos el 11 de agosto de 2024
I ended up buying two different temp / humidity sensors on Amazon. The first one, a sensor sold by WWZMDiB on Amazon (the one on the left in the picture) worked out fine for my ESP 8266 project, but the humidity readings seemed to be about 5% off compared to my "Airthings" radon/humidity/temp readings. The HiLetgo DHT22 in contrast gave me readings that exactly matched my "Airthings" and another table top temp / humidity device. I don't have any way to prove which one was right other than thinking if 3 devices agree, I have a better chance of being close to the actual value.You can see in the picture that the HiLetgo is just neater. The plastic enclosure around the sensor just looks crisp on the HiLetgo, but not quite as good on the other. Solder joints were just a tad cleaner on the HiLetgo. The HiLetgo was about twice the price, but I think it is worth paying a little more for a sensor that I am more confident in using. Both units came with hookup wire which made connecting them to the ESP 8266 a breeze. Both claim the same specs on accuracy. The "WWZMDiB" was cheaper and performed okay, just seemed to be a step down from the HiLetgo.
Rob
Comentado en los Estados Unidos el 27 de octubre de 2024
Very easy to set up basically plug in and play with the 3 prongs it has, code for it is pretty straightforward too and humidity jumps a bit to much though. for the money it's a great choice
Customer
Comentado en los Estados Unidos el 12 de agosto de 2023
Once the sensors are warmed up and steady state (~5 min) they agree on the same temperature. This is exactly what I needed, and the DHT11s they replaced had errors of 3-5 degrees Fahrenheit.I have been consistently pleased with HiLetgo's quality, and am very pleased with these sensors.
M. Walker
Comentado en los Estados Unidos el 18 de octubre de 2023
I'm a little new to the world of ESP and this was my first attempt to add something to my Atom Lites. But boy was it easy. I connected 3 Dupont wires from this to 5V, GND, and a GPIO pin on the Atom and was off to the races. Just added a handful of lines of YAML to ESPHome on Home Assistant and the sensors were created. Literally a 5 minute thing, plug and play - no resistor.In terms of accuracy, I have this and a Govee BLE an inch apart on my desk for a few hours and the Govee says 70.9 F and this is putting out 70.9 F. Govee humidity is 38% and this is 39%. If they aren't accurate, well they are identically inaccurate - and I think that is unlikely.Certainly you can find alternatives for a few dollars less, but I wanted no fussing and this delivered.
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