Cannot recover with NRFgo: "Could not read AHB-AP Id. Could not connect to target."

[Jamie]

See subject. The softdevice is currently installed on the chip (v6.0.0-1.alpha)

I searched online, and found some information that the security state of the chip has been set to "locked". Is this true? How to unlock it?

Thanks! Jamie

[Jamie]

I was running the stock BLE Heart Rate Service app that comes with the Nordic SDK (which I believe is programmed to go into system off mode after 3 minutes or so of inactivity). The soft device that was installed along with the firmware was the newest one--6.0.0-alpha.

Thanks, Jamie

[Ole Morten]

As I said, as long as you've set a wake-up source before entering system off, this will not happen, so I can't imagine this being a problem that a potential end-user would face.

If you don't have any further questions, I'd be happy if you could accept my initial answer as accepted, if it solved the problem.