ble pairing after poweroff mode

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Wed, 16 Mar 2016 18:10:13 GMT

no, @Dani I didn't solved this problem & didn't find a reasonable answer :)

RE: ble pairing after poweroff mode

Dani — Tue, 12 Jan 2016 16:05:34 GMT

@Mohamed: Have you solved this? Could you share with us the solution?

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Wed, 02 Dec 2015 22:24:06 GMT

I edited the device manager to do what I need... thanks for your great help :) :)

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Wed, 02 Dec 2015 19:53:19 GMT

okay @Petter Myhre, you are right, I handled the connection events with the dm manager & the disconnection event is handled by another function using:

switch (p_ble_evt->header.evt_id)
		{
			  case BLE_GAP_EVT_DISCONNECTED:
						pattern_ID_6(70,100);
						advertising_start();
						break;

, the problem now is that I need after the disconnection I need the development kit to re-start the advertising again using the dm manager ? ? ?

RE: ble pairing after poweroff mode

Petter Myhre — Wed, 25 Nov 2015 08:40:50 GMT

The flash will be maintained as long as you don't erase it. You don't have to do anything special to not erase it.

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Tue, 24 Nov 2015 22:19:55 GMT

okay @petter Myhre, we I tried to use this function and I waked up through the LPCOMP, I found that it requests to perform bonding again, sd_power_system_off() does not earse the flash, what is the conditions that maintain the flash memory while you use the sd_power_off()?, I mean do you enable any flags any function you call before calling the system off function ?

RE: ble pairing after poweroff mode

Petter Myhre — Tue, 24 Nov 2015 14:47:46 GMT

sd_power_system_off() does not erase flash, so the bonding information should still be there.

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Tue, 24 Nov 2015 11:49:08 GMT

@Aryan in Master control panel, it remembers that the device is a bonded device Aryan but when I try to use any service it will perform the bonding again that's the same like the previous problem, the ble module or development kit doesn't save the boning information, Note that the function I used to go to sleep mode is "sd_power_system_off();"

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Tue, 24 Nov 2015 11:45:00 GMT

@Aryan I'm using both Aryan , the bonding process & pairing

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Tue, 24 Nov 2015 11:42:05 GMT

@Petter Myhre the function I used to go to sleep mode is "sd_power_system_off();" is it handled also for this function !!

RE: ble pairing after poweroff mode

Susheel Nuguru — Tue, 24 Nov 2015 11:28:55 GMT

mohammed, My answer is specific for pairing (not bonding) for bonding Petter Myhre has given good answer.

RE: ble pairing after poweroff mode

Petter Myhre — Tue, 24 Nov 2015 11:23:04 GMT

If you are using the Device Manager this should already be handled.

It stores the bonding information in persistently in flash, and loads the bonding information into RAM when you wake up from system off.

RE: ble pairing after poweroff mode

Susheel Nuguru — Tue, 24 Nov 2015 11:21:19 GMT

When the system is woken up from system off, a system reset is applied and all the short term keys will be lost. Also the peer to which your device was connected will forget this keys because going to system off means the peer device most probably disconnected from your device. Which means that even if you have saved paring STK, you wont be able to use it as the peer will not recognize it. Use bonding instead of pairing in this case.

RE: ble pairing after poweroff mode

Mohamed O.Abouzeid — Tue, 24 Nov 2015 10:47:48 GMT

@Wojtek yes, I want to save the bonding information to be used after the wakeup & the firmware not to perform a new bonding process !!!

RE: ble pairing after poweroff mode

Wojtek — Tue, 24 Nov 2015 10:40:10 GMT

Did you consider using ram retention?