pyupm_ms5803 module

class pyupm_ms5803.MS5803(bus, address=118, csPin=-1)

Bases: object

UPM API for the MS5803 Pressure and Temperature sensor.

ID: ms5803

Name: I2C Barometric Pressure and Temperature Sensor

Category: temperature pressure

Manufacturer: sparkfun

Connection: i2c spi

Link:https://www.sparkfun.com/products/12909 The MS5803-14BA is a new generation of high resolution pressure sensors with SPI and I2C bus interface. It is optimized for depth measurement systems with a water depth resolution of 1cm and below. The sensor module includes a high linear pressure sensor and an ultra low power 24 bit delta-sigma ADC with internal factory calibrated coefficients. It provides a precise digital 24 bit pressure and temperature value and different operation modes that allow the user to optimize for conversion speed and current consumption. A high resolution temperature output allows the implementation of a depth measurement systems and thermometer function without any additional sensor.

The device is driven at 3.3vdc, and has a pressure range of between 0 and 14 Bar, and a temperature range of between -40 and +85C.

C++ includes: ms5803.hpp

getPressure()

float getPressure()

Return the latest measured pressure. update() must have been called prior to calling this function. The returned value is in millibars.

Pressure in mbar

getTemperature()

float getTemperature()

Return the latest measured temperature. update() must have been called prior to calling this function. The returned value is in degrees Celsius.

Temperature in degrees C

reset()

void reset()

Reset the device.

setPressureOSR(osr)

void setPressureOSR(MS5803_OSR_T osr)

Set the output sampling resolution of the pressure measurement. Higher values provide a more precise value. In addition, more precise values require more time to measure. The default set at device intialization is the highest precision supported: MS5803_OSR_4096

osr: One of the MS5803_OSR_T values.

setTemperatureOSR(osr)

void setTemperatureOSR(MS5803_OSR_T osr)

Set the output sampling resolution of the temperature measurement. Higher values provide a more precise value. In addition, more precise values require more time to measure. The default set at device intialization is the highest precision supported: MS5803_OSR_4096

osr: One of the MS5803_OSR_T values.

update()

void update()

Take a measurement and store the current sensor values internally. This function must be called prior to retrieving any sensor values, for example getTemperature().