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129 lines
4.2 KiB
Markdown
129 lines
4.2 KiB
Markdown
---
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layout: page
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title: "OpenALPR"
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description: "Instructions how to integrate licences plates with OpenALPR into Home Assistant."
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date: 2016-09-22 00:00
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sidebar: true
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comments: false
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sharing: true
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footer: true
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logo: openalpr.png
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ha_category: Automation
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featured: false
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ha_release: 0.29
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ha_iot_class: "Local Push"
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---
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[OpenALPR](http://www.openalpr.com/) integration for Home Assistant allows you to process licences plates recorded with a camera. You can use them to open a garage door or trigger any other [automation](https://home-assistant.io/components/automation/).
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<p class='note'>
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If you want use a video stream. You need setup the [ffmpeg](/components/ffmpeg) component. See also there for troubleshooting local ffmpeg installation.
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</p>
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### {% linkable_title Local installation %}
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If you want process all data locally, you need version 2.3.1 or higher of the `alpr` commandline tool.
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If you don't find binaries for your distribution you can compile from source. Documention of how to build OpenALPR is found [here](https://github.com/openalpr/openalpr/wiki).
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On a Debian system you can use this `cmake` command to build only the command line tool:
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```bash
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$ cmake -DWITH_TEST=FALSE -DWITH_BINDING_JAVA=FALSE --DWITH_BINDING_PYTHON=FALSE --DWITH_BINDING_GO=FALSE -DWITH_DAEMON=FALSE -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
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```
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Verify your `alpr` installation with:
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```
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$ wget -O- -q http://plates.openalpr.com/h786poj.jpg | alpr -
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```
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### {% linkable_title Configuration Home Assistant %}
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```yaml
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# Example configuration.yaml entry
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openalpr:
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engine: local
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region: eu
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confidence: 80.0
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entities:
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- name: Camera garage 1
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interval: 5
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render: ffmpeg
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input: INPUT_STREAM
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extra_arguments: SOME OTHER FFMPEG STUFF
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- name: Camera garage 2
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interval: 5
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render: image
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input: https://camera_ip/still_image.jpg
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username: admin
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password: bla
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```
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Configuration variables:
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- **engine** (*Required*): `local` or `cloud` for processing
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- **region** (*Required*): Country or region. List of supported [values](https://github.com/openalpr/openalpr/tree/master/runtime_data/config).
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- **confidence** (*Optional*): The minimum of confidence in percent to process with Home Assistant. Defaults to 80.
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- **entities** (*Required*): A list of device to add in Home Assistant.
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- **name** (*Optional*): This parameter allows you to override the name of your OpenALPR entity.
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- **interval** (*Optional*): Time in seconds to poll a picture. If the interval is 0 It don't poll and it only process data with `openalpr.scan` service. Default is 2 seconds.
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- **render** (*Optional*): How is Home Assistant to get a picture from. It support `ffmpeg` for video streams and `image` for a still image. Default is with `ffmpeg`.
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- **input** (*Required*): The source from getting pictures. With `ffmpeg` it could by all supported input. Image only support an URL.
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- **extra_arguments** (*Optional*): Only available with `ffmpeg`.
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- **username** (*Optional*): Only available with image for HTTP authentification.
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- **password** (*Optional*): Only available with image for HTTP authentification.
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### {% linkable_title Configuration Home Assistant local processing %}
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```yaml
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# Example configuration.yaml entry
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openalpr:
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engine: local
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region: eu
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alpr_binary: /usr/bin/alpr
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entities:
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...
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```
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Configuration variables:
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- **alpr_binary** (*Optional*): Default `alpr`. The command line tool `alpr` from OpenALPR software for local processing.
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### {% linkable_title Configuration Home Assistant cloud processing %}
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```yaml
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# Example configuration.yaml entry
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openalpr:
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engine: cloud
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region: eu
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api_key: SK_AAABBBBCCCEEEE
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entities:
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...
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```
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Configuration variables:
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- **api_key** (*Required*): You need an API key from [OpenALPR Cloud](https://cloud.openalpr.com/).
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#### {% linkable_title Service %}
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- `openalpr.scan`: Scan immediately a picture from input.
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- `openalpr.restart`: Restart a ffmpeg process
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#### {% linkable_title Events %}
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```yaml
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# Example configuration.yaml automation entry
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automation:
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- alias: Open garage door
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trigger:
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platform: event
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Event_type: openalpr.found
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Event_data:
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entity_id: openalpr.camera_garage_1
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plate: BE2183423
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...
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```
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This event is trigger after OpenALPR found a new licence plate.
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