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# Sensor Configuration
Specify configuration file to use:
```shell
asterctl --config monitor.json
```
- The configuration file is loaded from the configuration directory if not an absolute path is specified.
- The default configuration directory is `./cfg` and can be changed with the `--config-dir` command line option.
The original AOOSTAR-X json configuration file format is used, but only a subset of the configuration is supported:
- Setup object fields:
- `switchTime`: Optional switch time between panels in seconds, string value interpreted as float and converted to milliseconds. Default: 5
- `refresh`: Panel redraw interval in seconds specified as a float number. Default: 1
- Panel object fields in `diy[]`:
- `img`: Background image filename. Loaded from the specified configuration directory if not an absolute path is specified.
- `sensor`: Array of sensor objects.
- Sensor object fields:
- `label`: label identifier, also used as sensor value data source identifier
- `integerDigits`: sensor value format option: number of integer places. Value is 0-prefixed to number of places and set to `99` if overflown.
- `decimalDigits`: sensor value format option: number of decimal places.
- `unit`: optional unit label, appended after the sensor value
- `x`: x-position
- `y`: y-position
- `fontFamily`: Font name matching font filename without file extension. Fonts are loaded from the configured font directory.
- `fontSize`: Font size
- `fontColor`: Font color in `#RRGGBB` notation, or `-1` if not set. Examples: `#ffffff` = white, `#ff0000` = red. Default: `#ffffff`
- `textAlign`: Text alignment: `left`, `right`, `center`
- Fields used for the fan (2), progress (3) and pointer (4) sensor modes:
- `min_value` and `max_value`
- `width` and `height`
- `direction`
- `pic`: progress image, loaded from the specified configuration directory if not an absolute path is specified.
- `min_angle` and `max_angle`
- `xz_x` and `xz_y`
Example configuration file: [cfg/monitor.json](https://github.com/zehnm/aoostar-rs/blob/main/cfg/monitor.json).
Sensor values are not read from the configuration file (the `sensor.value` field is ignored).
See [Sensor Value Provider](../provider).
More options might be supported later.