Description Boardoza HP303B Barometric Pressure and Temperature Sensor is a compact, low-power digital sensor breakout board for pressure and temperature measurement. Based on the HP303B capacitive pressure sensing principle, the board is designed for accurate barometric pressure, altitude, and ambient temperature monitoring. Each HP303B sensor is individually factory calibrated and includes a 24-bit internal signal processor for converting raw sensor data into pressure and temperature values. The board supports both I2C and SPI communication, includes a 32-sample FIFO buffer, and can use optional interrupt functionality through the SDO pin. It is suitable for IoT devices, wearables, mobile electronics, weather stations, altitude measurement systems, and battery-powered sensor nodes. Features Digital barometric pressure and temperature sensor breakout board Based on the HP303B sensor Factory-calibrated sensor for reliable pressure and temperature readings 24-bit internal signal processor Supports I2C and SPI communication 32-sample FIFO buffer to reduce host processor load Optional interrupt signaling through the SDO pin Low power consumption for battery-powered applications Compact 20mm x 20mm board Specifications Specification Parameter Model HP303B Manufacturer Boardoza Manufacturer IC HOPERF Functions Digital barometric pressure and temperature sensor Supply Voltage 3.3V - 5V Interface I2C, SPI Pressure Measurement Range 300 hPa - 1200 hPa Pressure Precision +/-0.005 hPa, high precision mode Relative Accuracy +/-0.06 hPa Absolute Accuracy +/-1 hPa Temperature Accuracy +/-0.5°C Pressure Temperature Sensitivity 0.5 Pa/K Measurement Time 27.6 ms typical in standard mode 16x, 3.6 ms minimum in low precision mode Average Current Consumption Pressure 1.7 uA @ 1 Hz, temperature 1.5 uA @ 1 Hz, standby 0.5 uA FIFO Buffer Depth 32 samples Operating Temperature -40°C to +85°C Board Dimensions 20mm x 20mm Dimensions Interface Pin / Jumper Description 3V3-5V Positive power supply SDO I2C address LSB or interrupt; SPI MISO or interrupt CSB I2C not used, leave open; SPI chip select SDA I2C serial data; SPI MOSI in 4-wire mode or data in 3-wire mode SCL I2C serial clock; SPI serial clock GND Ground JP1, JP2 SPI mode open by default; short for I2C mode JP3 I2C address 0x77 open by default; short for address 0x76 Applications Barometric pressure measurement Temperature monitoring Weather stations Altitude measurement systems IoT environmental sensing nodes Wearables and mobile electronics Battery-powered sensor projects Product List Quantity Item 1 Boardoza HP303B Barometric Pressure and Temperature Sensor Resources Official GitHub Repository Boardoza HP303B Datasheet PDF Boardoza HP303B STEP File FAQ What does this sensor measure? It measures barometric pressure and temperature. What communication interfaces are supported? It supports both I2C and SPI communication. What is the pressure measurement range? The pressure measurement range is 300 hPa to 1200 hPa. What supply voltage does it use? The supply voltage range is 3.3V to 5V. What is the board size? The board dimensions are 20mm x 20mm.
