AHT20+BMP280 Temperature Humidity Air Pressure Sensor Module High-Precision I2C 2-5V for Arduino Raspberry Pi 7

AHT20+BMP280 Temperature Humidity Air Pressure Sensor Module High-Precision I2C 2-5V for Arduino Raspberry Pi Key Features & Benefits ️ 2‑in‑1 Sensor: Temperature, humidity, and barometric pressure.

High Precision: AHT20: ±0.3℃, ±2% RH; BMP280: ±1 hPa.

I2C Interface: Only 4 wires (VCC, GND, SCL, SDA).

Wide Voltage: 2.0-5V – works with 3.3V or 5V systems.

Ultra‑Compact: 16×16mm, 4P GROVE connector.

Library Support: Arduino examples available.

Applications: Weather stations, indoor monitoring, drone altitude hold. Product Description Need to monitor temperature, humidity, and air pressure simultaneously? AHT20+BMP280 2‑in‑1 sensor module is the perfect choice. Combines AHT20 (temp/humidity) and BMP280 (pressure). Digital I2C output, 2.0-5V power. Tiny 16×16mm board with 4P GROVE connector. Arduino examples included. Ideal for weather stations, drone altimeters, indoor air quality monitors. ⚡ Quick Start Guide & Important Tips

⚠️ Important: I2C addresses: AHT20 = 0x38, BMP280 = 0x76.

Voltage: 2.0-5V, do not exceed 5.5V.

Pull‑up resistors: Module may have internal pull‑ups; if unstable, add 4.7kΩ to VCC.

Connector: 4P GROVE (1.27mm) or 2.54mm header – solder your own pins if needed.

Arduino Example Code #include #include #include Adafruit_AHTX0 aht; Adafruit_BMP280 bmp; void setup() { Serial.begin(9600); aht.begin(); bmp.begin(0x76); } void loop() { sensors_event_t humidity, temp; aht.getEvent(&humidity, &temp); Serial.print("Temp: "); Serial.print(temp.temperature); Serial.print(" ℃, Humidity: "); Serial.print(humidity.relative_humidity); Serial.print(" %, Pressure: "); Serial.print(bmp.readPressure() /100.0); Serial.println(" hPa"); delay(1000); }

Common Questions ❓ No data? Check I2C wiring, power (2-5V), run I2C scanner for 0x38 and 0x76.

❓ Fluctuating readings? Avoid heat/airflow sources, add averaging, ensure stable power.

❓ Need to solder pins? Module has GROVE or pad holes – solder your own pins or use GROVE cable.

❓ BMP280 address? Default 0x76. Specifications Chips: AHT20 + BMP280

Voltage: DC 2.0V – 5V

Interface: I2C (SCL, SDA)

Temp Accuracy: ±0.3℃

Humidity Accuracy: ±2% RH

Pressure Accuracy: ±1 hPa

Dimensions: 16×16×3mm

Connector: 4P GROVE

Note: measurement, allow 1‑3mm error. Colors may vary.

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