What kind of GATT Characteristic is 0x1534 on BLE DFU Service?

[R. Kawajiri]

Hello,

We use DFU Service with nrf51 with sdk 9.0.0.

GATT 0x1543 characteristics can be found on DFU Serivce. But the descriptions are not found on documents.

infocenter.nordicsemi.com/index.jsp

We don't worry about DFU function. This is just curiousity

[R. Kawajiri]

I understand this by reading source code.

This is characteristics for the revision of DFU.

Thank you