TIL: How to Wake up a Laptop without WoL (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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I've had a laptop that I've never been able to get WoL (Wireless or otherwise) to work, no matter what I tried. Recently realized that the Bluetooth keyboard I used was able to wake it with a key press though.

I searched and found an ESP Home project that will make an ESP32 emulate a Bluetooth keyboard - https://github.com/dmamontov/esphome-blekeyboard

Now for $6 of hardware, I can wake my Laptop up remotely via HA, whenever needed. Definitely recommended!

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[-] [email protected] 24 points 1 year ago

I must be too old school because my first thought when i read this was “with an old solenoid lying around and a few lines of code, an AtTiny could strike a key on the bluetooth keyboard, waking the laptop!

[-] [email protected] 7 points 1 year ago* (last edited 1 year ago)

You could ditch the solenoid and use a ATMega32u4 that can act as a HID device to send a keypress signal.

[-] [email protected] 6 points 1 year ago

I'm mildly surprised OP's laptop keeps the bluetooth radio powered up while asleep, but I would be a lot more surprised to find one that doesn't work with USB HID.

[-] [email protected] 2 points 1 year ago

I was a little surprised as well, but I think it's because the keyboard / mouse I use (and the ESP32) all use Bluetooth LE specifically.

I looked at USB solutions first actually, but then decided to try ESP Home solution since I was already familiar with the system.

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this post was submitted on 18 Feb 2024

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