The i2c extension controls and monitors components over an I2C bus. Provided are a set of interfaces through the support of adafruit-blinka. There are a large variety of supported linux boards that you can use I2C on.
This extension does not take an extension level config and is focused on interfaces.
Connect and control a character display over I2C to display messages.
| Option | Type | Required | Description |
| key | [String] | Yes | Unique slug id for the component |
| address | [Integer] | Yes | The i2c address of the display (as an integer) Default: 39. |
| name | [String] | No | Friendly display name of component. Useful for UI. |
| model | [String] | No | Model of display to use. Options: i2c, rgb, or pcf. Default i2c |
| default_duration | [Integer] | No | Time in seconds for messages to be displayed on screen by default when no duration is provided. Default: 5 |
| max_duration | [Integer] | No | The max time in seconds that messages can be on the screen. Default: 60 |
| message_limit | [Integer] | No | Number of messages to accept into queue before overwriting. Default: 20 |
| topic | [Integer] | No | Channel to listen for events on. Default: char_display/{key} |
| persist_display | [Boolean] | No | Set to True to keep last message on screen when no new messages are available. Default: False |
Here is a config of a complete i2c display.
"char_display": [{
"key": "i2c_display_1",
"interface": "i2c",
"address": 39,
"name": "I2C LCD Display",
"model": "pcf",
"max_duration": 30,
"default_duration": 10,
"topic": "char_display/i2c_display_1",
"message_limit": 20,
"persist_display": false
}]