pyupm_dfrec module

class pyupm_dfrec.DFREC(apin, uart_ow, device_idx, a_ref)

Bases: object

DFRobot EC Meter.

ID: dfrec

Name: Analog Electrical Conductivity (EC) Sensor

Category: liquid

Manufacturer: dfrobot

Connection: analog uart

Link:https://www.dfrobot.com/index.php?route=product/product&product_id=1123&search=DFR0300&description=true #.Vx49p-_n-M8 The driver was tested with the DFRobot EC Analog Sensor.

This device measure the electrical conductivity of an aqueous solution. The included probe is a K=1 model.

Calibration is somewhat complicated - see the DFRobot wiki for instructions on calibration. Functions are provided to supply the appropriate values. By default, the values used in the DFRobot arduino example are used.

wiki:https://www.dfrobot.com/wiki/index.php/Analog_EC_Meter_SKU:DFR0300

C++ includes: dfrec.hpp

getEC()

float getEC()

Get computed EC (ms/cm) value from the sensor. update() must have been called prior to calling this function.

EC value in ms/cm.

getNormalized()

float getNormalized()

Get the normalized ADC value from the sensor. update() must have been called prior to calling this function.

The normalized ADC value.

getTemperature()

float getTemperature()

Get the measured temperature from the temperature sensor. The return value will be in Celsius.

temperature read from the sensor in Celsius.

getVolts()

float getVolts()

Get the measured volts from the sensor. update() must have been called prior to calling this function.

The voltage measurement.

setOffset(offset)

void setOffset(float offset)

Set sensor offset. This offset is applied to the return EC value before scaling. Default is 0.0.

offset: The offset to apply.

setScale(scale)

void setScale(float scale)

Set sensor scale. The return EC value is scaled by this value before the offset is applied. Default is 1.0.

scale: The scale to apply.

setThreshold1(thres, scale, offset)

void setThreshold1(float thres, float scale, float offset)

Set the threshold 1 values. See the DFRobot wiki for details.

thres: Threshold maximum for value section 1. Default 448.

scale: Scale for value section 1. Default 6.64.

offset: Offset for value section 1. Default -64.32.

setThreshold2(thres, scale, offset)

void setThreshold2(float thres, float scale, float offset)

Set the threshold 2 values. See the DFRobot wiki for details.

thres: Threshold maximum for value section 2. Default 1457.

scale: Scale for value section 2. Default 6.98.

offset: Offset for value section 2. Default -127.0.

setThreshold3(scale, offset)

void setThreshold3(float scale, float offset)

Set the threshold 3 values. See the DFRobot wiki for details.

scale: Scale for value section 3. Default 5.3.

offset: Offset for value section 3. Default 2278.

setThresholdMinMax(min, max)

void setThresholdMinMax(float min, float max)

Set the global threshold min and max values. See the DFRobot wiki for details.

min: Minimum threshold to be valid. Default 150.

max: Maximum threshold to be valid. Default 3300.

update()

void update()

Read the sensor status and update internal state. dfrec_update() must have been called before calling any of the other get*() functions.