use the feature of LE Data Packet Length Extension which in core v4.2

[pengchao]

HI, i want to know, how can i use the feature of  LE Data Packet Length Extension which in core v4.2.

i want to connect the PDK with the my phone, What should we change?

[haakonsh]

Hey pengchao,

See GATTS ATT_MTU Exchange. Once you have configured the maximum MTU size, enabled the SoftDevice, and connected to your phone, you can send a MTU update request from your phone to the PDK. 

Cheers,

Håkon.