undefined reference to hci_le_read_suggested_default_data_length

[ann]

how to slove this undefined reference error:

uint16_t SuggestedMaxTxOctets = 0xFB;

 uint16_t SuggestedMaxTxTime = 0X148;

 hci_le_read_suggested_default_data_length(&SuggestedMaxTxOctets, &SuggestedMaxTxTime);

i am using bluenrg-2

[Tesla DeLorean]

Figure out which source or library file the function is supposed to be in, and then ADD that file to the project.

Use find-in-files, check if code is selectively compiled in with a define.