SDK15 sd_ble_gap_scan_start() call after PM_EVT_CONN_SEC_SUCCEEDED:

[Mikhail]

Hi!

I want to start scan in central mode after one connect has established and I received success evt PM_EVT_CONN_SEC_SUCCEEDED:

In a SDK13 I can make same, but at SDK15 I get except when scan started.

How to do it?

I need in the connected state scan air for another uuids.

[Mikhail]

When I call sd_ble_gap_scan_start(), I get error code is:

Invalid state, operation disallowed in this state

is it not to call sd_ble_gap_scan_start() after evt PM_EVT_CONN_SEC_SUCCEEDED: ?

[Mikhail]

additional log. But after changed RAM start to 

Change the RAM start location from 0x20002AD8 to 0x20006418

almost same behavior. Project fall but not a right now and after 20 seconds about.

[Mikhail]

I changed RAM to 0x20006418 and RAM size to 0x9BE8

but RTT log doesn't work now.

 

[Mikhail]

Now change start RAM from 0x200049C8 and size 0xD528- all works. RTT works.

#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 1 

#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 2

#define NRF_SDH_BLE_TOTAL_LINK_COUNT 3

?? Why I can't run RTT with different settings? How correct calculate this RAM area?

[Joakim Jakobsen]

RAM usage of the SoftDevice will depend on which the configuration the SoftDevice uses, e.g. the number of concurrent central links and peripheral links etc.

There is alot of useful information regarding this topic around devzone.
You can take a look at this links, and see if it is helpful.

ROM and RAM Management
https://devzone.nordicsemi.com/f/nordic-q-a/17845/calculate-memory-settings-for-51822_xxab-and-s130-v2-0-1

Please let me know if you have any further questions.
Best regards,
Joakim.