https://devzone.nordicsemi.com/f/nordic-q-a/20483/please-check-dfuHi. i'm using nRF51822AC, SDK12.2.0, S130 v2.0.1 as central. I want to make sure that how to operate DFU. Please check there is missing point or wrong point. Step 1. Make PK as below. nrfutil keys generate priv.pem nrfutil keys display en-USTelligent Community 13Tue, 14 Nov 2017 10:43:53 GMT