Thank you. I’ll leave it as it is, the tablet is used from time to time. Then it is sometimes switched on for days and needs power from time to time. A warning message then makes sense.
And the display of unavailability doesn’t bother me as long as I know which device is meant. 
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I’ve been playing around with this, and recently had a Blink Doorbell Camera battery go dead. Unfortunately their battery entity is either “Low” or “Normal”, not a numerical percentage so it was not picked up. Any way that can be handled?
It should report you battery when the state is low. Just check that your Blink Doorbell Camera battery is shown as Battery.
I am interested in this so if you could check your battery in developer tools and maybe take a screen shot of it so I can look at it.
Blacky
Hi @Blacky, a brief scan of the blueprint code seems to indicate it only supports entities with device_class set to battery. Is that correct?
I am looking for a low battery blueprint that supports custom entities so that I can use things like compensation for batteries that misreport their values. My compensations report values with units of %, but they do not allow setting the device class to my knowledge.
Thanks for the screen shot.
It is a binary sensor and binary sensors have an ON / OFF state but home Assistant reports them in the UI with a nice name depending on their device class. For a battery that would be ON = Low and OFF = Normal. Here is a link to Home Assistants website that list binary sensors and what they will look like, click here.
You doorbell battery is in the ON state so in the UI you will see it as LOW. You have the correct device class so this blueprint should find it and report it whn it is ON / Low.
Maybe if you provide us your YAML of the automation? This YAML code are the settings you have selected in the automation so I can help. To do this go into your automation, top right 3 dots, Edit in YAML, copy all the code, come back to the forum and in your reply at the top tool bar click on “</>” and paste code in there.
Blacky
Yes.
Yes, but you can still assign a device_class (and other attributes) by using a template sensor based on the compensated sensor.
template:
- sensor:
- name: "Your Battery Name Here"
unit_of_measurement: "%"
device_class: battery
state: "{{ states('sensor.your_compensated_sensor_here') }}"
Or if you just using helper for a template sensor and then just use this in the state template. Then fill out the other inputs.
{{ states('sensor.your_compensated_sensor_here') }}
It is a sensor > compensated > back to sensor. Would be nice if HA just had a device class in compensated sensor. Maybe put it to them… seams like an easy update for them.
Edit: I asked for the feature, click here & Vote.
Blacky
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I’m relative new to HA and hope someone has an answer. Because my HA isn’t public avilable I’m using a self-hosted “ntfy” application and want to include details about which device has which battery level. Is there any variable or something similar I can use in my custom-action?
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Thx @Blacky. Don’t know how I was able to miss it.
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I have an improvement Idea, it would be nice if there would be an option wich only sends the OK notification if the automation is triggert with the Button, but not with the timed trigger.
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Sorry I was traveling and did have a chance to try anything for a few days. After excluding the hardwired Blink cameras that always report low battery (I assume a bug in the integration), the script is working as expected.
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Helllo:
Thank’s a lot for your blueprint.
I am using it, but it is reporting a low battery and i don’t find what sensor is it?
I have tried to play with variables without good luck.
Using:
action: telegram_bot.send_message
metadata: {}
data:
title: "Low Battery "
message: “{{all_sensors}}”
I only get the title… i don’t get a list of sensors.
How could i know which one is generating a bad value?
Tnx.
Because your using a custom action to send a message to telegram you will need to set it up correctly with a if, then, else action. This FAQ (click here) shows you how to do this depending on what you would like to do. Look at points 6 and 7.
If you are not seeing any sensors is because there are none to report (all okay)
If you can’t find the sensor then you will need to look in Settings > Device & Services > Entities tab at top In the search search for the battery name. It could be named just battery so your message may be battery is Low!. battery is the name of your sensor and is Low! is the blueprint. Another example is Fridge is Low!. Fridge is the name of your sensor and is Low! is the blueprint. Once you find it I recommend to update the friendly name so you will know what it is in your telegram message.
Blacky
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I’m new to your blueprint and have a question.
Is there any way to deactivate the notification that all my batteries are OK?
I just want to be notified when batteries reach values below a threshold but every day I get this message “YES! all batteries are OK :)”
Yep, depending on what notify option your using being to a device or in the UI. See below.
Blacky
How do i filter out all unknown and unavailable devices from showing in the notification automatically not one by one?
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I am using your blueprint well. I have one question. I want to send a message through Telegram. Is there a way? I tried several ways, but it is beyond my ability. Thank you.