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Added Reconnecting and Waking Notes

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Brikwerk 2020-08-01 23:10:33 -07:00
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docs/Miscellaneous Notes.md
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@ -40,3 +40,40 @@ to #323232, the button colour set to #FFFFFF and the grip colours are set to
In the future, Nintendo may produce more Pro Controller colours, however,
at this point in time, setting the grip colour is not possible.
## Reconnecting after the "Change Grip/Order" menu is opened
Opening the "Change Grip/Order" menu (either through the Controllers menu or
within a game) causes the Switch to cancel all Bluetooth connections to
controllers and force a reconnection.
The process is still a bit of a mystery (for me, at least) how exactly
a controller reconnects after the Grip/Order menu is opened. There are a
couple of little quirks and gotchas to be aware of that I've run into:
1. Controllers must run through a complete reconnection after the Grip/Order
menu is opened. A controller cannot revive or reconnect on its previous
connection. The Switch must reach out to the controller and the reconnection
process must be run through again. The Grip/Order menu, however, does not
cancel previous Bluetooth pairings. This rule only applies while the Grip/Order
menu is open. Once the menu is closed, controllers can attempt to revive a
connection, however, they still might have to run through the reconnection
process.
2. After reconnection on the Grip/Order menu, **emulated** controllers
**must** press the L + R buttons before attempting regular input. This is a bit of a strange condition that I'm still grappling with. In some situations,
a non-emulated controller can get away with not pressing the L + R buttons
and jump straight into regular input. I'm not 100% sure how they're able to,
however, I think it's an okay enough compromise to hardcode an L + R press
after a reconnection.
## Waking the Switch Over Bluetooth
From a preliminary investigation, it seems that the Pro/Joy Controllers use
Broadcom Fast Connect (or something similar) to wake the Switch over Bluetooth.
Since this falls under a hardware-specific function, it's not possible to
emulate this unless a given piece of hardware matches this feature.
In the future, a potential strategy to wake the Switch might be to connect
a given device running NXBT over the dock's USB port and implement
Wake-On-USB instead.