Demo only works once

[teovoinea]

I had setup the demo in nerves livebook and HAP printed the connection code, the Home App identified the accessory, but at connection time a but in my code caused a failure. Ever since, HAP no longer prints the connection code after starting the accessory server. I've tried reflashing, restarting, killing the process.

It's definitely an issue on my end, I just don't know how to reset/restart for debugging purposes.

[mtrudel]

Flaky pairing is unfortunately a fact of life with HomeKit; 'just try it again' is my usual advice. There are a couple of things to note though:

• Changing the identifier in your configuration to a new one often helps. iOS seems to cache some aspects of device setup based on this identifier
• Waiting a few minutes between attempts in order to let mDNS caches expire often helps
• All of the state in HAP is contained in whatever data_path is set to (this depends on the target; see the docs for details). Deleting this and restarting should get you back to a clean state.

Thinking about this, I wonder if a HAP.reset_pairing function would be useful for such cases, that would remove any of the persistent information / pairing data and reset the device to a clean slate. WDYT?

[teovoinea]

reset_pairing would be a great addition!