We ask You to take part in updating the knowledge base by answering questions about your sensors by the link: forms.gle/5BLcq8yeZ7apPCKt8
We express our gratitude and provide bonuses for help in filling the knowledge base to the Project members:
werox, kini, andrey_mozyr, androidpasha, den48rus, kononenkoev, Naevus, anikin, rw4cju.ru, SVL, vk319771979, Vladik770, yuns.
#t air12 | #RH humidity13 | #atm.pressure5 | #P power1 | #A energy1 | #logical1 | #luminosity1 | #radiation2 | #U voltage2 | #I current2 | #concentration1 | #dustiness2
 | Model: AHT10 Interface: i2c Power supply: 1.8...3.6V Data type: RH humidity Usage: indoor, outdoor Measuring range: 5...100% Resolution: 0.024% Price: 1-2 USD Sensor life, years: 1-2 Datasheet: AHT10.pdf Remarks: A temperature and humidity sensor developed by the Chinese on their own sensor base. At the moment, there is not enough information on its use. When tested, it passed the test well in high humidity conditions. |
 | Model: AM2302 Interface: Single-bus Power supply: 3.3...5.5V Data type: RH humidity Usage: indoor Measuring range: 20...90% Resolution: 0.1% Price: 2-3 USD Sensor life, years: < 1 Datasheet: AM2302.pdf Remarks: Temperature and humidity sensor DHT22. Newer, more accurate and more expensive DHT11, but still not good enough to work "in the field". When the humidity is > 80%, it shows 100%. Freezing in winter, shows the maximum humidity. |
 | Model: AM2320 Interface: i2c, single-bus Power supply: 3.1...5.5V Data type: RH humidity Usage: indoor Measuring range: 20...90% Resolution: 0.1% Price: 1-2 USD Sensor life, years: 3-5 Datasheet: AM2320.pdf Remarks: Further development of the AM2302/DHT22 temperature and humidity sensor with the i2c bus. Used for several years for indoor humidity monitoring, refuses to measure less than 20% humidity. |
 | Model: AM2320B Interface: i2c, single-bus Power supply: 3.1...5.5V Data type: RH humidity Usage: indoor Measuring range: 20...90% Resolution: 0.1% Price: 2 USD Sensor life, years: 3-5 Remarks: Temperature and humidity sensor AM2320 in the case, there is a jumper for switching to single-bus mode instead of i2c. |
 | Model: BME280 Interface: i2c Power supply: 1.7...3.6V Data type: RH humidity Usage: indoor Measuring range: 5...100% Resolution: 0.008% Price: 9 USD Sensor life, years: 1 Datasheet: BME280.pdf Remarks: Temperature, humidity and atmospheric pressure sensor. If the sensor is kept for a long time in conditions of high humidity and condensation, the tire may freeze, give incorrect readings for humidity and simply die. Requires an enclosure to protect against moisture and solar heat. Freezes, shows maximum humidity in winter. |
 | Model: BME680 Interface: i2c Power supply: 1.7...3.6V Data type: RH humidity Usage: indoor Measuring range: 5...100% Resolution: 0.008% Price: 14 USD Sensor life, years: 1 Datasheet: BME680.pdf Remarks: Temperature, humidity, atmospheric pressure and air quality sensor. Due to the rather high cost, there is still little data on the use of this sensor, but it gives readings quite correctly, at the SHT31 level. |
 | Model: CSMS12 Interface: analog 0.5...3V Power supply: 4.5...5.5V Data type: RH humidity Usage: outdoor Measuring range: 0...100% Resolution: ~ Price: 2 USD Sensor life, years: 2+ Datasheet: CSMS12.pdf Remarks: Capacitive Soil Moisture Sensor v1.2. The sensor outputs an analog voltage value that is proportional to soil moisture. There are two versions of the sensors, they differ in dependence, directly proportional or inversely proportional, that is, 3V will correspond to dry soil or wet. When using a voltage divider in a circuit (measurement on the ESP32 ADC), it is necessary to take resistors of at least 1 MΩ, otherwise the sensor will not be able to create the necessary potential at the output. |
 | Model: DHT11 Interface: Single-bus Power supply: 3.3...5.5V Data type: RH humidity Usage: indoor Measuring range: 20...90% Resolution: 1% Price: < 1 USD Sensor life, years: < 1 Datasheet: DHT11.pdf Remarks: The most outdated, cheap and unreliable temperature and humidity sensor, with the largest measurement errors. |
 | Model: HDC1080 Interface: i2c Power supply: 2.7...5.5V Data type: RH humidity Usage: indoor, outdoor Measuring range: 5...90% Resolution: 0.1% Price: 2 USD Sensor life, years: 1 Datasheet: HDC1080.pdf Remarks: Temperature and humidity sensor. With a humidity of more than 90%, it gives overestimated readings and rests on a constant value of 100%, which does not correspond to reality. Each sensor has its own serial number. |
 | Model: HTU21D Interface: i2c Power supply: 1.5...3.6V Data type: RH humidity Usage: indoor Measuring range: 5...90% Resolution: 0.04% Price: 1-2 USD Sensor life, years: 1 Datasheet: HTU21D.pdf Remarks: Temperature and humidity sensor. With a humidity of more than 90%, it gives overestimated readings and rests on a constant value of 100%, which does not correspond to reality. When working for a long time at high humidity, it dies. |
 | Model: SHT20 Interface: i2c Power supply: 2.1...3.6V Data type: RH humidity Usage: indoor, outdoor Measuring range: 5...90% Resolution: 0.04% Price: 2-3 USD Sensor life, years: 1 Datasheet: SHT20.pdf Remarks: Temperature and humidity sensor. With a humidity of more than 90%, it gives overestimated readings and rests on a constant value of 100%, which does not correspond to reality. Can work outdoors for quite a long time. |
 | Model: SHT31 Interface: i2c Power supply: 2.2...5.5V Data type: RH humidity Usage: indoor, outdoor Measuring range: 5...100% Resolution: 0.01% Price: 2-3 USD Sensor life, years: 3+ Datasheet: SHT31.pdf Remarks: Temperature and humidity sensor. The readings are close enough to the standards, while giving correct readings in all temperature and humidity ranges. "Survives" on the street under a heat shield or in a weather booth. |
 | Model: SI7021 Interface: i2c Power supply: 1.9...3.6V Data type: RH humidity Usage: indoor Measuring range: 5...90% Resolution: 0.025% Price: 1.5 USD Sensor life, years: 1 Datasheet: SI7021.pdf Remarks: Temperature and humidity sensor. With a humidity of more than 90%, it gives overestimated readings and rests on a constant value of 100%, which does not correspond to reality. When working for a long time at high humidity, it dies. |