So how do these price tags react when out of range and then come back in range?
Do they reconnect and everything is fine?
Can I see that it has reconnected?
Do the screens go blank when out of range?
My thought is to put one in my son’s school bag and update it at night with information he needs.
What’s for lunch at school, what time he must get home, “don’t forget…” and such.
But I want to know that they work for that use case.
I can at least answer this one. No. If you buy them through openepaperlink.de (first post in this thread), they arrive with no batteries and a startup message on the display.
If you only update it once a day, the batteries should last quite some time. Only updating the display with new content is using batteries. When there is something on the display, it does not consume power anymore. So I think these are indeed pretty good for your use case.
Can I update different tags with different frequency? For example, one tag just shows the Current Date. It doesn’t need to update every 40 seconds. Other tags display data that needs refresh every ten minutes.
yes, with automations you have full control. For example I update the display that shows garbage collection days just once per day. But I update my weather display every 2 hours.
I did notice that with updating every 2 hours the batteries stay around 2 months, so going any lower will have make that time shorter.
It’s been a few weeks since starting the first tag, but I was distracted with a few unrelated issues. A failing router, brakes on my Jeep failed totally- as in pedal to the floor, and a flood in my basement from a broken sump pump.
At any rate I wanted to get a couple more tags going so that I can experiment with automations.
The flood in the basement failed me with two separate alarms. One a simple battery-operated leak detector. If the contacts get wet a Sonalert screams. It works much better with fresh batteries.
The second was an Zigbee sensor that would trigger an automation to announce the leak detected over all of the Alexa devices in the house. This one I blame on Amazon. Periodically, and with no pattern (sometimes days, sometimes hours) I have to log on to a page at homeassistant.local:3456 to renew the cookie with Amazon. If I don’t, then there’s no connection to my Alexa devices. I’ve added a Pushover node that pushes a notification to our phones.
I dont think it is documented anywhere. At least when I was looking for it, I just figured it out by trial and error. I did not make notes, so not sure anymore.
I think in the format lines, the first is the alignment (left center or right)
2nd is background i think
3rd or 4th is the text color.
But just play a bit with it and it will explain itself. Border is also color so, b,w, or r
Format:
After some experimenting, here’s what I found: format: 1234
where:
1 = Position: Left, Right, Mid (l,r,m)
2 = Background Color: White, Black, Red (w,b,r)
3 = Line Border Color: White, Black, Red (w,b,r)
4 = Text Colot: White, Black, Red (w,b,r)