How does the 'Automatically Sleep and Wake' toggle switch work?

[Dr. Drib]

Originally Posted by fogice

Ah, shoot. I did an image search for Libra 2, and that's the one I grabbed. I drew the star on it myself, so I know that is the correct location for the on/off sensor.

Yes, I will confirm that the location of the sensor is correct.

(I wonder if an out-of-date charge card taped to the back would also work in lieu of using aluminum foil.)

[Dr. Drib]

Originally Posted by fogice

Cool! So it is possible that the threshold value that they use for on/off might just be set too low. I wonder if that's a user-accessible value somewhere in the config files.

That would be great if it can be adjusted to a higher threshold using the cofig file.

Any additional info on this - anyone?

[Quoth]

Originally Posted by fogice

Cool! So it is possible that the threshold value that they use for on/off might just be set too low. I wonder if that's a user-accessible value somewhere in the config files.

Or the magnet in the cover is too strong!
I found that the craft "plastic" magnet sheets and strips that work on notice boards and can be cut up are too weak to operate any ereader, but that the magnet from a cheap earbud works OK. The covers have a skinny disc about 8mm or so diameter as the magnet. You can feel it on the inside if you press hard.

I'd be surprised if it's a user setting and it could be a fixed level in hardware using one of the GPIO SoC pins that either only does logic level on/off (based on maybe 3.3V supply) or a comparator rather than an ADC pin that reads a particular voltage. But I don't know how it's connected and tested. However you need a wake-up interrupt and that is far more likely to use a dumb on/off pin as I've never seen a controller or SoC CPU do Analogue to Digital conversion without waking first.

[fogice]

Originally Posted by Dr. Drib

That would be great if it can be adjusted to a higher threshold using the cofig file.

Any additional info on this - anyone?

I don't see it on this list.

[Calenorn]

Originally Posted by Quoth

Some ereaders do have magnets inside to act as a catch for a cover. This is a stupid idea (loads in a Sage) because the magnets may cancel the sleep cover magnet of a second eink, phone or tablet when stacked on a table or in a bag. These are stronger magnets than the small one in a cover to operate the Hall Sensor device in the eReader, phone or tablet.

Similarly, I once bought an after-market sleep cover for a Clara. The cover had a kickstand, and the kickstand (when not being used) was held in place by a magnet. That magnet played havoc with the sleep function and drained the battery in short order. When I removed the reader from that cover, everything worked normally.

[JSWolf]

Originally Posted by fogice

Ah, shoot. I did an image search for Libra 2, and that's the one I grabbed. I drew the star on it myself, so I know that is the correct location for the on/off sensor.

So did I. I just typed in Kobo Libra 2 and bingo, I got the correct images. Here's one.

[JSWolf]

This cover is for the Clara HD. Notice the metal on the front cover. This solves the sleep problem when folded back. The cover I have for my H2O has the same bit of metal on the cover.