ble pairing at the first of every connection try !!

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Tue, 24 Nov 2015 10:39:26 GMT

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Tue, 24 Nov 2015 10:33:18 GMT

Hi Mohammed, it is a new question, would be nice to start a new thread. Search the forum for GPREGRET register which can retain its value in system off. You can temporarily use this register to save your pairing info before going to system off.

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Tue, 24 Nov 2015 09:59:47 GMT

Hello @Aryan, I already let the dm_manager to handle the connection events, it works, I mean on the on_ble_event I only included the dm_manger handler to handle the events,

I have a question, how to save pairing information after the wake-up from sd_power_off();

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Sun, 22 Nov 2015 18:18:25 GMT

Hi momhamed, please let us know how you solved it so that this useful information can be found to others.

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Fri, 20 Nov 2015 14:22:50 GMT

I solved it @Aryan ,thank you for your great help

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Fri, 20 Nov 2015 13:18:06 GMT

it is not required

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Fri, 20 Nov 2015 12:31:54 GMT

@Aryan okay I'll do that one thing only, should I update the connection parameters in the peripheral side after the first bond ? ??

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Fri, 20 Nov 2015 12:29:01 GMT

Hi mohamed, can you send me your full project , i will take a look at it monday morning. Today i am busy with other things. Try to upload your project on some file sharing website and send a link to that in private message to me.

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Fri, 20 Nov 2015 12:22:58 GMT

I changed the app context size to be 32 but no gain also !!

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Fri, 20 Nov 2015 12:15:28 GMT

okay, I'm using the default device manager event handler, & I checkted DEVICE_MANAGER_APP_CONTEXT_SIZE in the device_manager_cnfg.h I found that it equals to zero, may be this is the reason

also device_context_store is used to store bond info

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Fri, 20 Nov 2015 12:03:00 GMT

After bonding both sides will store the LTK and if you are using the device manager it will do it for you. When it tries to connect the second time, it should not delete the bond information by default. If you are testing this with phone, then the phone will remember bond information unless you explicitly asks it to forget the device. On your peripheral device, i am suspecting that you have not saved the bond information. Why are you not using device manager to do all this? if you want to manually handle it then go to the device_manager_peripheral.c and see dm_ble_evt_handler->BLE_GAP_EVT_AUTH_STATUS

see that device_context_store is used to save the bond info.

RE: ble pairing at the first of every connection try !!

Mohamed O.Abouzeid — Fri, 20 Nov 2015 11:48:15 GMT

hi aryan, the status of bonding is bonded after the first time I try to connect, then the second time I try to connect, it erase the bonding and try to bonding from scratch aryan .. ? ?

RE: ble pairing at the first of every connection try !!

Susheel Nuguru — Fri, 20 Nov 2015 10:59:01 GMT

pairing will be done everytime for new connection if the bond was not successful . I haven't looked into your code but can you confirm if bonding was done successfully ?

Also you need to check for other events like BLE_GAP_EVT_CONN_PARAM_UPDATE BLE_GAP_EVT_AUTH_STATUS for bonding. Please check the message sequence charts for bonding here