Precise Environmental Data for Your Smart Home
The Tinycontrol AHT20 is much more than just a sensor – it is the precise sensory organ for your automation system. With its high measurement accuracy, it records temperature and humidity with reliability essential for controlling heating, ventilation, or air conditioning systems. Whether you want to ensure the perfect climate in your wine cellar or optimize conditions in your greenhouse, this precise I2C sensor for home automation provides you with the exact data you need for intelligent decisions. It is therefore an indispensable tool for any project in the area of Smart Living & Gadgets.
Plug & Play Integration with Tinycontrol Lan Controllers
Forget complicated wiring and soldering. The AHT20 sensor was specifically developed for seamless cooperation with Tinycontrol Lan Controllers. Thanks to the pre-assembled 27 cm long cable with an RJ12 connector, installation is incredibly simple: plug in, configure in the controller, done. This Plug & Play capability makes it the ideal choice for beginners and professionals alike and enables quick and error-free commissioning of your monitoring system. It can also be used as a direct replacement for the older AM2301B sensor.
Robust and Reliable: The AHT20 Sensor in Detail
What sets the AHT20 apart from cheaper alternatives like the DHT11 is its robust construction and technical superiority. The sensor chip is equipped with a special filter that makes it less susceptible to water condensation – a common problem that can lead to erroneous 100% humidity readings in other sensors. The digital I2C interface ensures stable, interference-free communication, even over longer distances (with appropriate extension). Each sensor is factory-calibrated, ensuring consistently high quality and long-term stability.
Universally Applicable: More than just Tinycontrol Accessories
Although the RJ12 connection is perfectly tailored to Tinycontrol systems, inside lies a universal AHT20 chip with a standard I2C protocol. This means you can easily use the sensor with other microcontroller platforms such as Arduino, Raspberry Pi, or ESP32. For these systems, countless ready-made libraries already exist that make control a breeze. This flexibility makes the AHT20 an extremely versatile sensor that shines as high-quality Accessories in various electronics projects far beyond its primary intended use.
Strengths & Notes at a Glance
- Pro: Very high measurement accuracy (±0.3 °C / ±2 % RH) for reliable data.
- Pro: Immediately ready for use with Tinycontrol systems thanks to RJ12 connector.
- Pro: Special filter significantly reduces measurement errors due to condensation.
- Pro: Factory-calibrated, digital I2C interface for interference-free transmission.
- Note: The fixed I2C address (0x38) only allows one sensor per bus without a multiplexer.
- Note: The connection cable is relatively short at approx. 27 cm and requires an extension if needed.
Specifications & Features
| Manufacturer: | Tinycontrol |
| Model: | AHT20 |
| EAN: | 5907333395054 |
| Manufacturer Part Number (MPN): | 95054 |
| Product Classification: | Sensor (Accessories for IoT-Controller) |
| Sensor Chip: | AHT20 |
| Measured Parameters: | Temperature, Relative Humidity |
| Temperature Measurement Range: | -40 °C to +85 °C |
| Temperature Accuracy (typical): | ±0.3 °C |
| Temperature Accuracy (overall range): | ±1 °C |
| Temperature Resolution: | 0.01 °C |
| Humidity Measurement Range: | 0 to 100 % RH |
| Humidity Accuracy (typical, at 25°C): | ±2 % RH |
| Humidity Accuracy (overall range): | ±3 % RH |
| Humidity Resolution: | 0.024 % RH |
| Special Feature: | Protective filter against water condensation |
| Communication Interface: | I2C (Inter-Integrated Circuit) |
| I2C Address: | 0x38 (fixed, not changeable) |
| Supply Voltage: | 2.2 V to 5.5 V DC |
| Recommended Voltage: | 3.3 V |
| Logic Level Compatibility: | 3.3 V and 5 V systems |
| Power Consumption (Sleep Mode): | up to 5μA |
| Calibration: | Factory calibrated and linearized |
| Connection: | Pre-assembled cable with RJ12 connector |
| Cable Length: | approx. 27 cm |
| Sensor Housing Dimensions: | 58 x 26 x 13 mm |
| Primary Compatibility: | Tinycontrol LK3 (from v3.5), LK4, LK4mini, tcPDU |
| Alternative Compatibility: | Replacement for sensor AM2301B |
| Universal Compatibility: | Arduino, Raspberry Pi, ESP32 and other microcontrollers |
Scope of Delivery
| 1 x Tinycontrol AHT20 Temperature & Humidity Sensor with RJ12 Connection Cable |
Frequently Asked Questions (FAQ)
Can I operate multiple of these AHT20 sensors on a Tinycontrol Lan Controller?
Yes, but with a limitation. Since the sensor has a fixed I2C address, only one sensor can be directly connected per I2C bus. However, the Tinycontrol Lan Controller v3.5 and higher often offers multiple interfaces or supports splitters, which allow the connection of additional I2C or 1-Wire sensors to your Network.
Is the sensor suitable for outdoor use?
The sensor itself has a wide operating temperature range of -40 to +85 °C. However, the Enclosures are not explicitly designated as waterproof. For outdoor use, it should be mounted using appropriate Mounting Systems in a location protected from direct rain and weather influences.
Do I need to calibrate the sensor before using it?
No, the AHT20 sensor is delivered fully calibrated by the manufacturer and outputs digital, corrected values. Manual calibration by the end-user is not required.
Does this sensor also work with a Raspberry Pi or Arduino?
Yes, absolutely. Although it is pre-assembled for Tinycontrol systems, the AHT20 chip uses a standard I2C interface. It can therefore be easily used with any microcontroller, including Raspberry Pi and Arduino.
What is the difference between this AHT20 and cheaper DHT11/DHT22 sensors?
The AHT20 is technologically superior. It offers higher accuracy, more stable long-term performance, and communicates via the more reliable I2C bus, which simplifies integration into Network systems with multiple sensors.
Does the sensor require external pull-up resistors for the I2C bus?
In many cases, pull-up resistors are already integrated into host controllers like the Tinycontrol Lan Controller. However, for very long Cabling runs, it may be necessary to add external pull-up resistors to ensure stable communication.
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