Arduino Toolkit - arduinosensor.SI7021

: arduinosensor.SI7021

SI7021 temperature and humidity sensor

Methods

: obj = SI7021(arObj)

: obj = SI7021(arObj, propertyname, propertyvalue ....)

Constructor to create SI7021 sensor

Inputs

arObj - the arduino parent object

propertyname, propertyvalue - optional property name, value pairs. Current known properties are: Current properties are:

i2caddress

I2C address of the SI7021 (default 0x40)

Outputs

obj - created SI7020 object

Example

 
 a = arduino()
 sensor = arduinosensor.SI7021(a)
 
 

: C = temperature(dsObj)

Read the temperature

Inputs

dsObj - the si7021 object

Outputs

C - read temperature in deg C.

Example

 
 a = arduino()
 s = arduinosensor.SI7021(a)
 # get temp
 temp = s.temperature
 
 

See also: arduinosensor.SI7021.

: relH = humidity(dsObj)

Read the relative humidity

Inputs

dsObj - the si7021 object

Outputs

relH - relative humidity as a percentage (0 - 100.0)

: relH = info(dsObj)

Read the sensor info

Inputs

dsObj - the si7021 object

Outputs

inf - structure containing the sensor information.

Structure fields are:

version

Chip firmware version

id

sensor id1,id2 value

type

String for detected chip type