Bit-Tree Creativity - AHT20+BMP280 Temp Humidity Barometric Pressure Sensor

AHT20+BMP280 Temperature, Humidity & Barometric Pressure Sensor

BIT‑TREE AHT20+BMP280 3‑in‑one sensor module integrates high‑precision AHT20 temperature‑humidity chip and BMP280 barometric pressure chip. Data transmission runs over the I2C single‑bus protocol. It concurrently measures temperature, humidity, atmospheric pressure and altitude figures. Featuring high measuring accuracy, low power draw and simple wiring, the module fits environmental monitoring, mini weather station construction, maker education and smart hardware development.

3‑in‑one design with high measurement precision

Effortless wiring via the I2C bus

Stable signal output at low power consumption

BIT-TREE CREATIVITY

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Parameter Dimension	Specification Details
Product Model	A067
Product Weight	Cased weight: 10g — Bare PCB weight: 4g
Communication Interface	IIC (I²C) Bus Interface
Air Pressure Measurement Range	300–1100hPa
Temperature Measurement Range	-40°C ~ +85°C
Humidity Measurement Range	0%RH ~ 100%RH
Module Dimension	See attached drawing
Pin Definition	Positive Power Pin - VDD Negative Power Pin - GND IIC Data Signal Line - SDA IIC Clock Signal Line - SCL
Application Scenarios & Applicable Fields	Indoor navigation (floor detection, elevator detection), outdoor navigation, sports & leisure applications, weather forecasting, vertical velocity indication
Optional Packaging Solutions	① Anti-static bag soft packaging ② White cardboard hanging box ③ Kraft paper box

#include <Wire.h>
#include <Adafruit_AHTX0.h>
#include <Adafruit_BMP280.h>

Adafruit_AHTX0 aht;
Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  Wire.begin();

  aht.begin();
  bmp.begin(0x76);  // 地址不对试 0x77

  Serial.println("AHT20+BMP280 开始采集");
}

void loop() {
  // 温湿度
  sensors_event_t h, t;
  aht.getEvent(&h, &t);

  // 气压
  float pressure = bmp.readPressure() / 100;
  float altitude = bmp.readAltitude(1013.25);

  Serial.print("温度: "); Serial.print(t.temperature); Serial.print(" ℃ | ");
  Serial.print("湿度: "); Serial.print(h.relative_humidity); Serial.print(" %RH | ");
  Serial.print("气压: "); Serial.print(pressure); Serial.print(" hPa | ");
  Serial.print("海拔: "); Serial.print(altitude); Serial.println(" m");

  delay(1000);
}

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