Pairing code digits

RE: Pairing code digits

GK — Wed, 02 Jan 2019 12:20:29 GMT

Hi how can i connect through random passkey

please help me

Hung Bui — Wed, 27 May 2015 13:50:20 GMT

@Steveo: I don't think it's possible to change the passkey to 4 digits. It's not something defined in Bluetooth core spec.

Stephen — Tue, 26 May 2015 21:05:07 GMT

These are both bad solutions. The correct solution is

Set the s110 bluetooth stack an option that indicates that the passkey is 4 digits.
the s110 bluetooth stack accepts this, and when the user enters a 4 digit passkey the device properly authenticates.

Hung Bui — Thu, 26 Mar 2015 11:22:23 GMT

Hi Sam,

By spec the passkey must have 6 digits.

There are 2 options that I can suggest:

Try to use your 4digit LCD to display the 6 digit key. You can either let the digit circling/sliding to the left to display the whole 6 digit (4 at a time) or display each time 3 digits
Use static passkey, so that the first 2 digits can be chosen, say 00, for example, and you generate 4 digits randomly in the application code. After that you feed that 6 digit (00XXXX) passkey to the softdevice. On the peer device you can tell user to use 00 at the begining before typing the 4 digit (XXXX) displayed.