Amazon Echo Dot 2nt generation

Maxwell Fisher - 2020-12-28


I found this Amazon Echo Dot at a pawn shop a while ago but never really got around to doing anything with it
Echo dot

The model number is RS03QR, which is the second generation

Got it open with only a bit of trouble, revealing these 6 main sections
Echo dot

Edit: make that 7 main sections, at first I thought that the speaker was built in to the housing but it turns out to be separate
Echo dot

Oooh, that looks like an RFID or possibly NFC sticker in the case. I wonder what it's for?
Echo dot

Whatever it is, I can't seem to get a read of the data

Though I did get it to turn on! (While taken apart)
Echo dot Echo dot

I got it to be just a bit smaller by taking out the metal frame and using an external speaker, though I don't really have the parts to attempt any hardware mods at the moment, so back to being a physically normal Echo Dot it goes

I'm not getting any data over USB at the moment, although holding the dot button while booting puts it in what I'm 90% sure is a dev mode, where the light turns green and it doesn't respond to any voice commands
Echo dot

And there it is!
Echo dot

It shows up as G090LF1183950HGX using fastboot
Echo dot

And this shows a bit more information (and confirms that the device is locked)
Echo dot

I ran fastboot reboot which worked properly, but now I can't seem to get the device to boot into dev mode

I seem to have gotten the problem fixed by holding all 4 of the buttons while booting

Anyways, here are some better pictures of the 2 PCBs
Echo dot Echo dot Echo dot

And here is the main board after removing the metal shielding
Echo dot

Here's the processor and RAM
Echo dot Echo dot

This chip is for networking, handling both the Wi-Fi and the Bluetooth
Echo dot

And this one is a digital to analog converter, used to control the speaker
Echo dot

And finally, this chip is for power management
Echo dot

To be continued...