I realize this is a relatively old article, but is there a way to add something like facial recognition to this setup, to allow notifications like “John is at the door”, “Your wife is home”, …

Why do it in Node RED at all? The purpose of Node RED is to get the data into a Home Assistant entity. Once that is the case, as it should now be, you can just write your automations with Home Assistant. That way, you don’t need to figure out how to send notifications thru Node RED (since Home Assistant already has a rather sophisticated alert system).

Hi Lee! The error you’re seeing is telling you that you’ve configured the Security Feed to pull from the /config/www/security_feed folder. So it’s trying to look in that folder for the images, but the folder does not exist. It sounds like you’re not generating images for review, which the security feed depends upon. This folder should have been created in the “Object Detection with DOODS” step, as it is the folder where the images you wish to review should be placed after they have been processed. Sorry if I did not mention that exactly. The DOODS step, right now, is the most confusing bit for others to implement since it’s just a Node RED implementation. I’m actually working on changing that step to a custom HA component, which should be much easier for everybody, and will be updating this post appropriately.

– Z

Any help would be appreciated

That makes sense. Thank you.

Hey Alex,

That prevents the flow from re-processing an image which has already been processed. msg.files was previously set to a flow-variable that contains any filename that has already been through the flow. The fact that it is returning null indicates that the flow has already been run on all the images in the directory.

Thanks for the tutorial.

Could you please explain this bit in “dedupe, filter to recent” function?

if (msg.files.includes(msg.filename)) {
return null;
}

With this bit it always return null