Yosemitech Y532 pH Sensor module

Sensor Datasheet

• Manual
• Modbus Instructions

Sensor Constructor

Example Code

The Yosemitech Y532 pH sensor is used in the menu a la carte example.

#include <sensors/YosemitechY532.h>

// NOTE: Extra hardware and software serial ports are created in the "Settings
// for Additional Serial Ports" section

// NOTE: Use -1 for any pins that don't apply or aren't being used.
byte          y532ModbusAddress  = 0x32;  // The modbus address of the Y532
const int8_t  y532AdapterPower   = sensorPowerPin;  // RS485 adapter power pin
const int8_t  y532SensorPower    = A3;              // Sensor power pin
const int8_t  y532EnablePin      = 4;               // Adapter RE/DE pin
const uint8_t y532NumberReadings = 1;
// The manufacturer actually doesn't mention averaging for this one

// Create a Yosemitech Y532 pH sensor object
YosemitechY532 y532(y532ModbusAddress, modbusSerial, y532AdapterPower,
                    y532SensorPower, y532EnablePin, y532NumberReadings);

// Create pH, electrical potential, and temperature variable pointers for the
// Y532
Variable* y532Voltage =
    new YosemitechY532_Voltage(&y532, "12345678-abcd-1234-ef00-1234567890ab");
Variable* y532pH =
    new YosemitechY532_pH(&y532, "12345678-abcd-1234-ef00-1234567890ab");
Variable* y532Temp =
    new YosemitechY532_Temp(&y532, "12345678-abcd-1234-ef00-1234567890ab");

Classes

class YosemitechY532

The Sensor sub-class for the Yosemitech Y532-A digital pH sensor.

class YosemitechY532_pH

The Variable sub-class used for the pH output from a Yosemitech Y532-A digital pH sensor.

class YosemitechY532_Temp

The Variable sub-class used for the temperature output from a Yosemitech Y532-A digital pH sensor.

class YosemitechY532_Voltage

The Variable sub-class used for the electrode electrical potential output from a Yosemitech Y532-A digital pH sensor.

Defines

#define Y532_NUM_VARIABLES = 3

Sensor::_numReturnedValues; the Y532 can report 3 values.

#define Y532_INC_CALC_VARIABLES = 0

Sensor::_incCalcValues; we don't calculate any additional values.

Sensor Timing

The sensor timing for a Yosemitch Y532

#define Y532_WARM_UP_TIME_MS = 500

Sensor::_warmUpTime_ms; time before sensor responds after power - 500ms.

#define Y532_STABILIZATION_TIME_MS = 4500

Sensor::_stabilizationTime_ms; time between "StartMeasurement" command and stable reading - 4.5sec (4500ms).

#define Y532_MEASUREMENT_TIME_MS = 1800

Sensor::_measurementTime_ms; the Y532 takes ~1800ms to complete a measurement.

pH

The pH variable from a Yosemitch Y532

• Range is 2 to 12 pH units
• Accuracy is ± 0.1 pH units

#define Y532_PH_RESOLUTION = 2

Decimals places in string representation; pH should have 2 - resolution is 0.01 pH units.

#define Y532_PH_VAR_NUM = 0

Sensor variable number; pH is stored in sensorValues[0].

#define Y532_PH_VAR_NAME = "pH"

Variable name in ODM2 controlled vocabulary; "pH".

#define Y532_PH_UNIT_NAME = "pH"

Variable unit name in ODM2 controlled vocabulary; "pH" (dimensionless pH units)

#define Y532_PH_DEFAULT_CODE = "Y532pH"

Default variable short code; "Y532pH".

Temperature

The temperature variable from a Yosemitch Y532

• Range is 0°C to + 50°C
• Accuracy is ± 0.2°C

#define Y532_TEMP_RESOLUTION = 1

Decimals places in string representation; temperature should have 1 - resolution is 0.1°C.

#define Y532_TEMP_VAR_NUM = 1

Sensor variable number; temperature is stored in sensorValues[1].

#define Y532_TEMP_VAR_NAME = "temperature"

Variable name in ODM2 controlled vocabulary; "temperature".

#define Y532_TEMP_UNIT_NAME = "degreeCelsius"

Variable unit name in ODM2 controlled vocabulary; "degreeCelsius" (°C)

#define Y532_TEMP_DEFAULT_CODE = "Y532Temp"

Default variable short code; "Y532Temp".

Voltage

The voltage variable from a Yosemitch Y532

• Range is -999 ~ 999 mV
• Accuracy is ± 20 mV

#define Y532_VOLTAGE_RESOLUTION = 0

Decimals places in string representation; voltage should have 0 - resolution is 1mV.

#define Y532_VOLTAGE_VAR_NUM = 2

Sensor variable number; voltage is stored in sensorValues[2].

#define Y532_VOLTAGE_VAR_NAME = "voltage"

Variable name in ODM2 controlled vocabulary; "voltage".

#define Y532_VOLTAGE_UNIT_NAME = "millivolt"

Variable unit name in ODM2 controlled vocabulary; "millivolt" (mV)

#define Y532_VOLTAGE_DEFAULT_CODE = "Y532Potential"

Default variable short code; "Y532Potential".