ALLNET 4duino High-Precision Air Pressure Sensor (ALL_OY_3259-1)

Accurate atmospheric pressure and temperature readings are essential for weather stations, altitude tracking, and environmental monitoring, yet many low-cost sensors drift or lack precision. The ALLNET 4duino High-Precision Atmospheric Pressure Sensor solves this by integrating the Bosch BMP280, a proven sensor chip that delivers reliable measurements in a compact module compatible with Arduino, Raspberry Pi, and other microcontrollers.

Who is it for

Makers, IoT developers, and educators who need a dependable barometric pressure sensor for projects such as weather stations, altimeters, indoor climate monitors, and drone altitude hold. It works with 3.3V and 5V systems and supports both I2C and SPI interfaces, making it easy to integrate into existing designs.

Main features

• Bosch BMP280 sensor chip for high accuracy and long-term stability
• Measures atmospheric pressure from 300 to 1100 hPa with ±1.0 hPa absolute accuracy
• Temperature measurement from -40 to +85 °C with ±0.5 °C accuracy
• Selectable I2C address (0x76 or 0x77) and SPI support for flexible connectivity
• Low power consumption: 0.1 mA typical, ideal for battery-powered projects
• Altitude measurement derived from pressure data
• Compact module with standard pinout: VCC, GND, SCL, SDA, CSB, SDO

Specifications

• Sensor chip: Bosch BMP280
• Pressure range: 300 to 1100 hPa
• Pressure absolute accuracy: ±1.0 hPa
• Pressure relative accuracy: ±0.12 hPa
• Pressure resolution: 0.01 hPa
• Temperature range: -40 to +85 °C
• Temperature accuracy: ±0.5 °C
• Temperature resolution: 0.01 °C
• Operating voltage: 3.3V - 5V DC
• Logic voltage: 3.3V
• Communication interfaces: I2C, SPI
• I2C address: 0x76 or 0x77 (selectable)
• Current consumption: 0.1 mA (typical)
• Data rate: up to 157 Hz
• Compatibility: Arduino, Raspberry Pi, ESP32, ESP8266, microcontrollers

Tips

For accurate altitude readings, calibrate the sensor at a known elevation and account for local weather pressure changes. Use the SPI interface when you need faster data rates or have multiple sensors on the same bus.