https://devzone.nordicsemi.com/f/nordic-q-a/53178/calling-softdevice-methods-in-a-ble-callbackI have always understood it to be dangerous to invoke a call in a callback. It is not clear to me what the callback model is in SoftDevice so I would like to know when it is safe to invoke sd_* calls when handling BLE events. In the pc-ble-driver exampleen-USTelligent Community 13Mon, 14 Oct 2019 13:37:56 GMThttps://devzone.nordicsemi.com/thread/214875?ContentTypeID=1Mon, 14 Oct 2019 13:37:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d3331f9a-b072-4e20-bf73-f17f60cdd121Einar Thorsrud<p>OK, then I suggest you continue in that case to avoid duplicating information.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/214868?ContentTypeID=1Mon, 14 Oct 2019 13:30:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31cfadf2-5959-42e1-af8f-098b1ade07c4brianreinhold<p>unsupported parameters. But clearly it is not. In other cases I get cant encode error. This is already posted as another issue.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/214832?ContentTypeID=1Mon, 14 Oct 2019 12:28:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f2685e8a-055b-4339-b5bf-f8bf886c0d3aEinar Thorsrud<p>Hi,</p> <p>Generally, there is no problem making SoftDevice calls from within the SoftDevice event handler, provided the interrupt priority is not too high. There may be some intricacies when using serialization or int he pc-ble-driver that I am not aware of though, so I am checking with the main pc-ble-driver developer an will get back to you.</p> <p>Update: I checked with the pc-ble-driver developers, and this should be OK. What problems do you get when you call&nbsp;sd_ble_gap_sec_params_reply()? What is the return value? Other issues?</p><div style="clear:both;"></div>