DFU Control Point - Set Packet Receipt Notification

[Twan]

So im trying to interact with a nrf52 chip. I am using iOS corebluetooth to communicate with the device and when the device sends a long data packet (~400 bytes) iOS drops some packets and loses them, I wanted to changed the number pf packet receipt notification on the chip so that I can lower it down to maybe 100? I found some documentation Here and thought if i used the nRFConnect iOS app to connect to the bluetooth device and the DFU characteristic and write the command it would change the packet receipt notification, is my understanding of the DFU commands completely wrong? If so how do I change this packet receipt notification

[Einar Thorsrud]

Hi,

I suggest you use the IOS-Pods-DFU-Library instead of implementing this yourself. That is what is used in for instance nRF Connect for iOS. There you can also set the PRN to whatever number you like.

[Twan]

Thanks for the link! That will help. But for now I just wanted to test my theory, is it possible to just use the nRFConnect iOS app and write some bytes to DFU characteristic to change the PRN? 

Lets say I want to change PRN to 20 Bytes (0x14) and the command for PRN is 0x02. The spec says its little endian. So I would want to write 0x1402? 

Again thanks for the response, I have little experience with this nRF stuff.