My project involves a Nucleo-64+X-NUCLEO-BNRG2A1 communicating with an Android phone via Bluetooth.
I successfully sent data from the server (BNRG2A1) to the client (Android phone), but I cannot figure out how to do the same from client to server.
Under Android, I can write data to the characteristic (in NO RESPONSE mode), but I fail to understand how to handle the write operation server-side.
My characteristic is declared as follow:
ret = aci_gatt_add_char(HWServW2STHandle,
UUID_TYPE_128,
&char_uuid,
2+2+4, CHAR_PROP_NOTIFY|CHAR_PROP_READ|CHAR_PROP_WRITE_WITHOUT_RESP,
ATTR_PERMISSION_NONE, GATT_NOTIFY_READ_REQ_AND_WAIT_FOR_APPL_RESP|GATT_NOTIFY_ATTRIBUTE_WRITE,
16,
1,
&EnvironmentalCharHandle);
What is it supposed to happen server-side? I've tried to implement aci_gatt_write_permit_req_event(), aci_att_exec_write_resp_event() and aci_gatt_indication_event(), but they are never called. Also, nothing is displayed in the console (with full debug info) when writing data client -> server.
