3 ms·

Please enter the passcode “0000” on the device “SATELLITE_2”

by danw1979 2y ago

Waterluvian 2y ago
Why does it always ask me to do this and then SATELLITE_2 never actually asks for a passcode?!
- lhamil64 2y ago
  Yeah so annoying to fly all the way up there and do an EVA just to find out that it didn't even ask for a passcode...
- codetrotter 2y ago
  I think the pin entry thing is used for actual entry when you pair for example a phone to a computer, at least with some phones and some computers. Whereas Bluetooth speakers for example will all (of the ones I’ve come across) auto-accept the pin without user input, typically because (I guess) the limited amount of buttons and displays make user input difficult. And even if it was like use volume plus and volume minus and play button, and use it to step digit by digit while the speaker reads aloud, it would be super finicky. So instead typically the Bluetooth speakers are made so that you have to press and hold some button on startup for example or press a dedicated other button, in order to enter pairing mode and so random people will not be able to connect to your speakers from outside your house unless they happen to try to do it at the very same time as the short window of time where you’ve turned on pairing. And because of that those speakers don’t really need the PIN for protection. However, even a lot of phones and computers will only allow pairing when you set the device “visible” I think, and that is often I think default to only stay on for some number of minutes in many cases. But I’m not sure if PIN is typically used in this situation or not also.
  - utensil4778 2y ago
    Bluetooth has many different pairing modes. The one most commonly used by pin-less devices like headphones and speakers is called Secure Simple Pairing. It pretty much just accepts any connection. There are other modes depending on hardware availability. If the device only has a screen there's a mode where it displays a pin for you to enter on the host. If it only has input but no screen, the host can give you a pin to enter on the device. The pin can be hardcoded (as with '0000') or generated on the fly. You can also have a pin-less device respond to pairing requests with a hardcoded pin, or obtain the pin through some side channel like a separate radio or a wired connection. In all cases, the devices typically use diffe-hillman to negotiate a secure link after pairing. You do have the option to disable encryption. Additionally, "pairable" and "visible" are totally independent concepts. A device can be "invisible" but still accept pairing from a device that knows its address. You can also be visible without accepting pair requests. This part of the BT spec was actually thought out quite extensively. There seems to be a provision for every corner case I've been able to imagine. No matter your situation, there's always a mode you can use to get your connection up.
deleted 2y ago
[deleted]

Please enter the passcode “0000” on the device “SATELLITE_2”

Waterluvian 2y ago

Why does it always ask me to do this and then SATELLITE_2 never actually asks for a passcode?!

lhamil64 2y ago
Yeah so annoying to fly all the way up there and do an EVA just to find out that it didn't even ask for a passcode...
codetrotter 2y ago
I think the pin entry thing is used for actual entry when you pair for example a phone to a computer, at least with some phones and some computers. Whereas Bluetooth speakers for example will all (of the ones I’ve come across) auto-accept the pin without user input, typically because (I guess) the limited amount of buttons and displays make user input difficult. And even if it was like use volume plus and volume minus and play button, and use it to step digit by digit while the speaker reads aloud, it would be super finicky. So instead typically the Bluetooth speakers are made so that you have to press and hold some button on startup for example or press a dedicated other button, in order to enter pairing mode and so random people will not be able to connect to your speakers from outside your house unless they happen to try to do it at the very same time as the short window of time where you’ve turned on pairing. And because of that those speakers don’t really need the PIN for protection. However, even a lot of phones and computers will only allow pairing when you set the device “visible” I think, and that is often I think default to only stay on for some number of minutes in many cases. But I’m not sure if PIN is typically used in this situation or not also.
- utensil4778 2y ago
  Bluetooth has many different pairing modes. The one most commonly used by pin-less devices like headphones and speakers is called Secure Simple Pairing. It pretty much just accepts any connection. There are other modes depending on hardware availability. If the device only has a screen there's a mode where it displays a pin for you to enter on the host. If it only has input but no screen, the host can give you a pin to enter on the device. The pin can be hardcoded (as with '0000') or generated on the fly. You can also have a pin-less device respond to pairing requests with a hardcoded pin, or obtain the pin through some side channel like a separate radio or a wired connection. In all cases, the devices typically use diffe-hillman to negotiate a secure link after pairing. You do have the option to disable encryption. Additionally, "pairable" and "visible" are totally independent concepts. A device can be "invisible" but still accept pairing from a device that knows its address. You can also be visible without accepting pair requests. This part of the BT spec was actually thought out quite extensively. There seems to be a provision for every corner case I've been able to imagine. No matter your situation, there's always a mode you can use to get your connection up.

deleted 2y ago

[deleted]