BlueNRG-MS write to remote characteristic

[grzegorz]

Posted on February 23, 2017 at 16:21

I try to write to a characteristic on a remote device, BlueNRG-MS works as peripheral client. I call aci_gatt_write_charac_value() and it returns SUCCESS. But then EVT_BLUE_GATT_PROCEDURE_COMPLETE comes and it is sometimes 0x00 (BLE_STATUS_SUCCESS) and sometimes it's 0x41 (BLE_STATUS_FAILED). What could be the reason and how to solve this? Stack is 7.2.c.

#ancs #iphone #ble #bluenrg-ms #client

[Andrea Palmieri · Accepted solution]

Posted on February 24, 2017 at 12:44

Hi,

could you catch the event 'EVT_BLUE_GATT_ERROR_RESP'? The error code parameter should provide the reason of failure according to table 3.3 of BLUETOOTH SPECIFICATION Version 5.0  Vol 3, Part F, Section 3.4

Regards.

[grzegorz]

Posted on February 25, 2017 at 23:11

The error code is 0xA2 which means this is an application level error. So I looked at ANCS documentation and it says this error code is for invalid parameter. So it turns out I was sending incorrect data to iPhone and it was rejecting it. Thank you very much for suggesting EVT_BLUE_GATT_ERROR_RESP