ble pairing after poweroff mode

[Mohamed O.Abouzeid]

kindly check this thread at first

my question is when I tried to power off the system using sd_power_off(); then waked up the system then try to connect, it requests to pair again,

my question is how to save the pairing information to be used after the wake up of the power off mode.

[Susheel Nuguru]

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.

[Susheel Nuguru]

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

[Mohamed O.Abouzeid]

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

[Mohamed O.Abouzeid]

@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();"

[Dani]

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

[Mohamed O.Abouzeid]

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