I could never get local working.
OpenALPR have changed their licencing model so it may not even be possible anymore, regardless or the ātechnical glitchesā that weāve experiencedā¦
At least not for freeā¦
Have it working in docker that has alpine as base image.
#Adding of dependencies
echo āhttp://nl.alpinelinux.org/alpine/edge/testingā >>/etc/apk/repositories && echo -e āhttp://dl-cdn.alpinelinux.org/alpine/edge/community\nhttp://dl-cdn.alpinelinux.org/alpine/edge/mainā >> /etc/apk/repositoriesapk --no-cache add --virtual .build-deps ca-certificates wget git gcc g++ cmake make curl-dev leptonica-dev log4cplus-dev opencv-dev tesseract-ocr-dev libexecinfo-dev
#Cloning and making of directories
cd /srv && git clone https://github.com/openalpr/openalpr.git && cd openalpr/src && mkdir build && cd build && sed -i.bak ās/backtrace/0;///ā ā¦/daemon.cpp
#building
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_SYSCONFDIR:PATH=/etc ā¦ && make -j8 && make install
as for using it, openalpr config does not work but a workaround from gavinwoolley here makes it usable. OpenALPR local not working
If you need help editing config etc just reach out.
Hi. I was excited to get local ALPR working after installing a driveway camera (5MP Reolink), but no go.
I followed a bunch of Linux installation guides (for my Raspberry Pi 4 HA installed via venv) but couldnāt get the command line working until I found and did: https://github.com/openalpr/openalpr/issues/641 which solved the tesseract language error.
Now I can identify number plates from image files via the command line, but itās not great. I have a nice clear photo of my car with the number plate about as obvious as you can imagine, andā¦ it misses a letter. I donāt hold out much hope that my driveway video camera will produce clear enough images!
But, Iād at least like to get something in HA other than āunknownā.
(Itās a shame that stale issues get closed on GitHub without resolutionā¦)
So, I guess Iām just adding my āanyone got this working?ā to the mix.
Installed it, after cp the tessdata/ to other location worked fine on the command line, but not in HA who shows just āunknownā. There is also something strange in my logs i canāt understand:
2020-09-22 10:57:31 ERROR (MainThread) [homeassistant.helpers.entity] Update for image_processing.alpr fails
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 278, in async_update_ha_state
await self.async_device_update()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 469, in async_device_update
await self.async_update() # type: ignore
File "/usr/src/homeassistant/homeassistant/components/image_processing/__init__.py", line 132, in async_update
await self.async_process_image(image.content)
File "/usr/src/homeassistant/homeassistant/components/openalpr_local/image_processing.py", line 189, in async_process_image
alpr = await asyncio.create_subprocess_exec(
File "/usr/local/lib/python3.8/asyncio/subprocess.py", line 236, in create_subprocess_exec
transport, protocol = await loop.subprocess_exec(
File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1630, in subprocess_exec
transport = await self._make_subprocess_transport(
File "/usr/local/lib/python3.8/asyncio/unix_events.py", line 197, in _make_subprocess_transport
transp = _UnixSubprocessTransport(self, protocol, args, shell,
File "/usr/local/lib/python3.8/asyncio/base_subprocess.py", line 36, in __init__
self._start(args=args, shell=shell, stdin=stdin, stdout=stdout,
File "/usr/local/lib/python3.8/asyncio/unix_events.py", line 789, in _start
self._proc = subprocess.Popen(
File "/usr/local/lib/python3.8/subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/local/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'alpr'
Im running HA in Docker. May this could be the reason, and if how can i fix it?
So now after 2 years this still doesnāt work?
For one who ares interested, thereās a openalpr addon for HAOS.
Originally from
But this one doesnāt install, so iāve modified it a bit, and make api compatible with openalpr cloud integration.
You can find the modified version here :
And you have to change the API_URL in openalpr cloud integration to your addon web server (default port is 5001).
Itās technicaly working, but accurancy is really not good, even test image from openalpr is recognised with mistake in plate. So not really usable.
@lasewun when i try
sed -i.bak ās/backtrace/0;///ā ā¦/daemon.cpp
nothing happens can you help me?
#building
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_SYSCONFDIR:PATH=/etc ā¦ && make -j8 && make install
Same for this part(no cmake installed)
Thank you in advance
cd /srv && git clone https://github.com/openalpr/openalpr.git && cd openalpr/src && mkdir build
apk add util-linux pciutils usbutils coreutils binutils findutils grep iproute2
apk add build-base gcc abuild binutils binutils-doc gcc-doc
apk add cmake cmake-doc extra-cmake-modules extra-cmake-modules-doc
apk add tesseract-ocr-dev
apk add opencv-dev
apk add curl-dev
apk add log4cplus-dev
#building
vi daemon.cpp and add // to line with backtrace
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_SYSCONFDIR:PATH=/etc && make -j8 && make install
shell_command:
garage_number_plate: ssh -i /config/ssh/id_rsa -o StrictHostKeyChecking=no [email protected] alpr -c eu /config/test.jpg -j > /config/garage_outdoor_plates.json
sensor 4 -
-platform: file
name: Tablica
file_path: /config/garage_outdoor_plates.json
value_template: ā{{value_json[āresultsā][0][āplateā]}}ā
This works for me 
For SSH you have to do the key etc.
ssh-keygen -t rsa
cp /root/.ssh/id* /config/ssh/
ssh-copy-id [email protected]
Hello I did make a simple script to run in terminal with everything done in above post.
Edited the two lines in daemon.cpp
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