The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features a standard I2C interface and a wide voltage supply of 2V-5V. With the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40℃ ~ ＋85℃. This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles and more. Connection Example - Arduino Features * Digital output, I2C interface * Excellent long-term stability * Quick response and strong anti-interference ability Specifications Module Parameters * Operating Voltage: DC2V-5V * Output Signal: I2C * I2C Address: 0x38 * Dimension: 30mm×20.5mm/1.18×0.81" AHT20 Chip Parameters Relative Humidity * Resolution: 0.024 %RH * Accuracy Error: ±2 %RH * Repeatability: ±0.1 %RH * Hysteresis: ±1 %RH * Non-linear: ±0.1 %RH * Response Time: 8S * Operating Range: 0~100 %RH * Long-term Drift: ＜0.5 %RH/yr Temperature * Resolution: 0.01℃ * Accuracy Error: ±0.3℃ * Repeatability: ±0.1℃ * Hysteresis: ±0.1℃ * Response Time: minimum 5S, maximum 30S * Operating Range: -40℃~85℃ * Long-term Drift: ＜0.04℃/yr Package Contents * 1x Fermion: AHT20 Temperature and Humidity Sensor * 1x 2.54mm 4-Pin Black Single-row Pin Header Resources * Product wiki * DFRobot AHT20 Library * Dimensions * Circuit Diagram SCH * 2D Dimensions * 2D CADDimensions * 3D STP Pinout Pin Function Description VCC Positive Power Supply Power Supply: DC 2V~5V GND Negative Power Supply -- SCL I2C Clock Line -- SDA I2C Data Line -- https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2023-03-07 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2023-12-27 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2024-09-18 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2024-11-29 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2024-11-30 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-02-13 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-04-10 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-08-05 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-09-29 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-11-28 https://elecena.pl/product/22727880/fermion-aht20-temperature-and-humidity-sensor 2025-11-29