GPIO

MCP23017(I2C)

This device driver supports the gpio MCP23017

MCP23017DeviceDriver(
    address=0x20,
    busnum=0
):

address

I2C address. Default is 0x20.

bus

I2C bus. If 0 or None default bus for platform is selected.

from kervi.application import Application
APP = Application()

from kervi.devices.gpio.MCP230XX import MCP23017DeviceDriver
gpio = MCP23017DeviceDriver()

gpio[1].define_as_output()
#Link to dashboard, shows as a button
gpio[1].link_to_dashboard()

gpio[2].define_as_input(pull_up=True)
#Link to dashboard, shows as a read only button
gpio[2].link_to_dashboard()

APP.run()

MCP23008(I2C)

This device driver supports the gpio MCP23008 with 8 general digital io pins

MCP23008DeviceDriver(
    address=0x20,
    busnum=0
):

address

I2C address. Default is 0x20.

bus

I2C bus. If 0 or None default bus for platform is selected.

from kervi.application import Application
APP = Application()

from kervi.devices.gpio.MCP230XX import MCP23008DeviceDriver
gpio = MCP23008DeviceDriver()

gpio[1].define_as_output()
#Link to dashboard, shows as a button
gpio[1].link_to_dashboard()

gpio[2].define_as_input(pull_up=True)
#Link to dashboard, shows as a read only button
gpio[2].link_to_dashboard()

APP.run()

PCF8574, PCF8574A(I2C)

This device driver supports the PCF8574 gpio extender with 8 general digital io pins

PCF8574DeviceDriver(
    address=0x27,
    bus=0
):

address

I2C address. Default is 0x27. This device comes in two flavors PCF8574 and PCF8574A. For PCF8574 the valid addresses should be in the range 0x20 to 0x27. For PCF8574A the valid addresses should be in the range 0x38 to 0x3F.

bus

I2C bus. If 0 or None default bus for platform is selected.

from kervi.application import Application
APP = Application()

from kervi.devices.gpio.PCF8574 import PCF8574DeviceDriver
gpio = PCF8574DeviceDriver()

gpio[1].define_as_output()
#Link to dashboard, shows as a button
gpio[1].link_to_dashboard()

gpio[2].define_as_input()
#Link to dashboard, shows as a read only button
gpio[2].link_to_dashboard()

APP.run()

PCF859(I2C)

This device driver supports the PCF859 gpio extender with 4 analog inputs and one analog output.

PCF859DeviceDriver(
    address=0x48,
    bus=0
):

address

I2C address. Default is 0x48.

bus

I2C bus. If 0 or None default bus for platform is selected.

from kervi.application import Application
APP = Application()

from kervi.devices.gpio.PCF859 import PCF859DeviceDriver
gpio = PCF859DeviceDriver()

Link to dashboard, shows as a button
gpio["AIN1"].link_to_dashboard()
gpio["AOUT"].link_to_dashboard()
gpio["AOUT"].value = 0.5
APP.run()