Generic GY-MS5803-01BA High-Precision Pressure Sensor Module - 10-1300 mbar, I2C, 3V

The module is designed for a nominal 3.0V DC supply. While the core MS5803-01BA sensor can typically operate from 1.8V to 3.6V, the onboard circuitry on this specific module is optimized for 3V. Exceeding 3.6V may damage the sensor. Always verify your power supply matches the 3V requirement before connecting.

Connect the module's VCC to 3V, GND to ground, SDA to your microcontroller's I2C data line, and SCL to the I2C clock line. The sensor has a default I2C address (typically 0x76 or 0x77). Use the provided Arduino library or write code to send command sequences for initiating pressure/temperature conversions and reading the 24-bit digital results from the data registers.

Yes, the MS5803-01BA sensor is capable of measuring both gaseous and liquid media pressure. However, the standard GY module PCB is not potted or sealed. For underwater or wet environment use, you must provide a waterproof enclosure or barrier that allows pressure transmission to the sensor's port while protecting the electronics from moisture and corrosion.

The MS5803-01BA sensor provides high relative accuracy, with typical errors below ±1.5 mbar. It features a 24-bit ADC, offering high digital resolution. For absolute accuracy, consider performing a one-point calibration against a known reference. Note that accuracy can be influenced by temperature; the integrated temperature sensor allows for software temperature compensation.