Product Description:
YJJ DHT22 AM2302 Module Digital Temperature And Humidity Sensor
Supports Single Bus And I2C Communication For Smart Home
Applications
Features:
Product Positioning
AM2320 is a digital temperature and humidity combined sensor based
on the improved single bus protocol. It is developed and produced
by Guangzhou Aosong Electronics. As an upgraded version of DHT22,
it maintains a similar appearance and interface while optimizing
the communication protocol and response speed, significantly
enhancing the communication reliability in complex electromagnetic
environments.
2. Key Features
High-performance measurement with excellent cost-effectiveness
Humidity measurement: Range of 0 - 99.9% RH, typical accuracy of
±2%
Temperature measurement: within the range of -40 to 80℃, with a
typical accuracy of ±0.5℃
Quick response: Temperature 3 seconds, Humidity 5 seconds (τ63%)
Enhanced Single-Bus Interface
Compatible with DHT series physical interfaces
Using an 800 μs wake-up pulse combined with a 40-bit data frame
structure
Built-in CRC check, communication success rate > 99.9%
Industrial-grade reliability
Operating temperature: -40 to 80℃ wide temperature range
Moisture-proof probe design (based on IP30 protection standard)
Long-term stability: < 1% RH/year drift
3. Typical Applications
Industrial Automation
Workshop Environmental Monitoring System
Power equipment temperature and humidity warning
Warehouse Logistics Environment Record
Smart Home
Intelligent air conditioning linkage control
Environmental perception of the fresh air system
Core sensor of high-end dehumidifier
Smart Agriculture
Greenhouse and Environment Monitoring
Grain storage monitoring
Aquaculture water quality management
1. It can measure the humidity and temperature of the surrounding
environment
The sensor uses AM2320 and supports both single bus and I2C
communication.
3. Humidity measurement range: 0% - 99.9% (within the temperature
range of 40°C - 80°C) Humidity measurement error: +/- 3%
4. Temperature measurement range: -40°C to 80°C. Temperature
measurement error: ±0.5°C
4 Working voltage: 3.1V - 5.5V
5 Output Format Digital Output
6. It is equipped with fixed bolt holes, facilitating installation.
Module Interface Description (4-wire System)
1 VCC: External 3.1V - 5.5V
2 SDA Serial data, bidirectional interface
3 GND External GND
4 SCL Serial Clock, Input Port (Grounded on single bus)
Specifications:
| Operating Voltage | 3.1—5.5V DC |
| Measurement Mode | Approximately 0.3—1m |
| Interface Type | Single-bus digital signal output |
| Range | 20 - 90%RH ± 2%RH |
