Experiment with NFC

[ran]

Hi, 

I'm experimenting with NFC using HRM example.

Enabled my Android Phone NFC, programmed the example ( bonds clear ) . 

First pair works - touch , get the "pair " , click Yes , I can see the device on the Bonded list. 

From there -> NRF Connect -> Connect -> I can see the info from Device. 

Now - From NRF Connect, I press disconnect.

1. Next "NFC Touch" Causes the program to run from scratch , why is that ? ( as if it was sleeping, and I touch to wake ) 

2. Now that device is awake - I'd like to reconnect to it, if I touch again -> I getting the "pair" message again on my phone. pressing yes will result in error 133. 
( will work again only If I'm erasing bonds by starting with BTN 3 pressed )

So, what is going on ? I can I cause a paired device to start advertising again ?  ( after a reset for ex. ) 

Thanks, 

Ran 

[Vidar Berg]

Hi,

A new pairing request is triggered every time the phone touches the NFC antenna, but the peer manager will by default reject pairing requests from bonded peers (https://devzone.nordicsemi.com/f/nordic-q-a/51965/pairing-and-bonding-after-deleting-synchronization), hence the "133/BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP" error.  

1. The example enters System OFF mode (deep sleep) after disconnect (see BLE_GAP_EVT_DISCONNECTED event) and the system is reset when it wakes up from System OFF.

2. You may modify the example to always start advertising after wakeup.

Best regards,

Vidar