Connection with and without bonds

[gercer]

Hello!

Im trying to change my application. Right now everything works with bonding. DFU and reading and writing characteristics. We have noticed a lot of clients unpair the devices on their phones causing issues when we try to connect getting the following error:

<info> peer_manager_handler: Connection security failed: role: Peripheral, conn_handle: 0x0, procedure: Bonding, error: 133
<info> app: PM_EVT_CONN_SEC_FAILED
<info> app: BLE_GAP_EVT_DISCONNECTED

Is there a way to be able to make the connection even if the bonding was not completed?

I noticed that writing and reading works fine if both of the devices are not bonded.

thanks

[Mttrinh]

Hi,

This is probably because the bonding information is still stored on the peripheral. You should be able to fix this by either erase all bonds on the peripheral or allow repairing on the peripheral.

Take a look at these two:

https://devzone.nordicsemi.com/f/nordic-q-a/60185/peer-manager-bonding-fails-with-error-code-133

https://devzone.nordicsemi.com/f/nordic-q-a/52034/sdk-15-3-pairing-issue

Hope this helps.