3.7 KiB
layout, title, description, date, sidebar, comments, sharing, footer, logo, ha_category, ha_release, ha_iot_class, redirect_from
| layout | title | description | date | sidebar | comments | sharing | footer | logo | ha_category | ha_release | ha_iot_class | redirect_from | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| page | MCP23017 I2C GPIO expander | Instructions on how to integrate the MCP23017 GPIO pin expander with I2C interface into Home Assistant. | 2019-04-14 07:00 | true | false | true | true | raspberry-pi.png |
|
0.92 | Local Polling |
|
The mcp23017 component is the base for all related mcp23017 platforms in Home Assistant. There is no setup needed for the component itself, for the platforms please check their corresponding pages.
{% linkable_title Binary Sensor %}
The mcp23017 binary sensor platform allows you to read sensor values from the I/O pins of your MCP23017 I2C I/O expander.
The pin numbers are from 0 to 15 where: 0-7 correspond to port A (A1-A8) and 8-15 to port B (B1-B8).
{% linkable_title Configuration %}
To use the I/O pins of an mcp23017 connected to and I2C bus of your Raspberry Pi as binary sensors, add the following to your configuration.yaml file:
# Example configuration.yaml entry
binary_sensor:
- platform: mcp23017
i2c_address: 0x20
pins:
0: PIR Office
1: PIR Bedroom
{% configuration %}
i2c_address:
description: i2c address of MCP23017 chip.
required: false
type: integer
default: "0x20"
pins:
description: List of used pins.
required: true
type: map
keys:
"pin: name":
description: The pin numbers (from 0 to 15) and corresponding names.
required: true
type: [integer, string]
scan_interval:
description: Interval to scan for sensor state changes in seconds.
required: false
type: integer
default: 15
invert_logic:
description: If true, inverts the output logic to ACTIVE LOW.
required: false
type: boolean
default: "false (ACTIVE HIGH)"
pull_mode:
description: >
Type of internal pull resistor to use.
Options are UP - pull-up resistor and DOWN - pull-down resistor.
required: false
type: string
default: "UP"
{% endconfiguration %}
NOTE: MCP23017 only has internal pull-up resistors, if you want to use pull-down you will have to wire your own pull-down resistors.
For more details about the MCP23017 I2C I/O port expander you can find its datasheet here: MCP23017.
{% linkable_title Switch %}
The mcp23017 switch platform allows you to write to the I/O pins of your MCP23017 I2C I/O expander.
The pin numbers are from 0 to 15 where: 0-7 correspond to port A (A1-A8) and 8-15 to port B (B1-B8).
{% linkable_title Configuration %}
To use the I/O pins of an mcp23017 connected to and I2C bus of your Raspberry Pi as switches, add the following to your configuration.yaml file:
# Example configuration.yaml entry
switch:
- platform: mcp23017
i2c_address: 0x20
ports:
11: Fan Office
12: Light Desk
{% configuration %}
i2c_address:
description: i2c address of MCP23017 chip.
required: false
type: integer
default: "0x20"
ports:
description: Array of used pins.
required: true
type: list
keys:
port:
description: The pin numbers (from 0 to 15) and corresponding names.
required: true
type: [integer, string]
invert_logic:
description: If true, inverts the output logic to ACTIVE LOW.
required: false
default: false
type: boolean
{% endconfiguration %}
For more details about the MCP23017 I2C I/O port expander you can find its datasheet here: MCP23017.
Note that a pin managed by HASS is expected to be exclusive to HASS.