GY-63_MS5611/libraries/I2C_ASDX/README.md

I2C_ASDX

Arduino library for I2C ASDX pressure sensor

Description

The ASDX sensor of Honeywell exist in many variations. Check the datasheet for all the details.

The I2C_ASDX library can read the sensor and give the pressure in millibar, bar or PSI.

The interface consists of the following:

• I2C_ASDX(address, psi) COnstructor, I2C address and maximum pressure.
• begin(sda, scl) I2C parameters for ESP32
• begin() for UNO and other boards supporting Wire.
• reset() resets internal variables,
• available() tests if ASDX sensor is available (just address check)
• read() reads the sensor, checks for errors, calculates the pressure and set lastRead
• getPressure() retuns an int in milliBar, will return 0 after reset() and no read done.
• getMilliBar() returns a float in milliBar
• getBar() returns a float in bar
• getPSI() returns a float in PSI = Pounds per Square Inch.
• errorCount() total counter for
• lastRead() time in millis since last succesful reading the sensor
• state() last known state of read, also returned by read()

Testing

The library is tested with only 3 different sensors, all of the PG type. Code is prepared but not tested for 15, 5 and 1 PSI too.

    ID    UNIT       TYPE   DESCRIPTION
                              output is porportional to difference
    PG    PSI        Gage   * between applied pressure and atmospheric pressure
    MG    mBar       Gage   * idem
    BG    Bar        Gage   * idem
    KG    KiloPascal Gage   * idem
     D    Differential      * between pressure applied to each of the ports.
     A    Absolute          * between applied pressure and built-in reference to vacuum.


    ADDRESS   PRESSURE   RANGE          TYPE      P   A T V
    0x58      100 psi    0..6895 mBar   SSCDANN 100PG 5 A 5
    0x38       60 psi    0..4137 mbar   SSCDANN 060PG 3 A 5
    0x28       30 psi    0..2068 mbar   SSCDANN 030PG 2 A 5

    P = pressure range
    A = I2C address indicator
    T = accuracy range
    V = voltage (3 volt also supported, not tested)

That saidm it is expected that the library is modifyable to support many more as long as they have the following raw read values.

    1638  =   0 PSI
    14746 = max PSI

Testing

TESTED TYPES - type A 10% - 90% only

Operation

See examples