Very late to this thread, but we successfully ported Nordic legacy buttonless DFU...we get timing of ~2.5 minutes for ~1.4MB binary. Keep in mind the DFU service uses write-no-response and we don't use the prn flow-control. The one issue I'm noticing however is Apple CoreBluetooth doesn't allow high...

Hello, Did you ever figure out how to set eFuse bits over JTAG?