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79 lines
2.7 KiB
Markdown
79 lines
2.7 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/I2C_ASDX/blob/master/LICENSE)
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[](https://github.com/RobTillaart/I2C_ASDX/releases)
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# I2C_ASDX
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Arduino library for I2C ASDX pressure sensor
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## Description
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The ASDX sensor of Honeywell exist in many variations.
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Check the datasheet for all the details.
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The I2C_ASDX library can read the sensor and give the pressure in millibar, bar or PSI.
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The interface consists of the following:
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- **I2C_ASDX(address, psi)** COnstructor, I2C address and maximum pressure.
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- **begin(sda, scl)** I2C parameters for ESP32
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- **begin()** for UNO and other boards supporting Wire.
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- **reset()** resets internal variables,
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- **available()** tests if ASDX sensor is available (just address check)
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- **read()** reads the sensor, checks for errors, calculates the pressure and set lastRead
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- **getPressure()** retuns an int in milliBar, will return 0 after reset() and no read done.
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- **getMilliBar()** returns a float in milliBar
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- **getBar()** returns a float in bar
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- **getPSI()** returns a float in PSI = Pounds per Square Inch.
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- **errorCount()** total counter for
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- **lastRead()** time in millis since last succesful reading the sensor
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- **state()** last known state of read, also returned by read()
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## Testing
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The library is tested with only 3 different sensors, all of the PG type.
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Code is prepared but not tested for 15, 5 and 1 PSI too.
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```
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ID UNIT TYPE DESCRIPTION
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output is porportional to difference
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PG PSI Gage * between applied pressure and atmospheric pressure
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MG mBar Gage * idem
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BG Bar Gage * idem
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KG KiloPascal Gage * idem
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D Differential * between pressure applied to each of the ports.
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A Absolute * between applied pressure and built-in reference to vacuum.
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ADDRESS PRESSURE RANGE TYPE P A T V
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0x58 100 psi 0..6895 mBar SSCDANN 100PG 5 A 5
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0x38 60 psi 0..4137 mbar SSCDANN 060PG 3 A 5
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0x28 30 psi 0..2068 mbar SSCDANN 030PG 2 A 5
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P = pressure range
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A = I2C address indicator
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T = accuracy range
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V = voltage (3 volt also supported, not tested)
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```
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That saidm it is expected that the library is modifyable to support many
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more as long as they have the following raw read values.
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```
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1638 = 0 PSI
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14746 = max PSI
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```
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## Testing
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TESTED TYPES - type A 10% - 90% only
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## Operation
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See examples
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