Application does not start without debugger connected

[bloobird0]

Hello,

in my current project we develop a BLE firmware which runs on a custom board based on a Telit +s42 module (with integrated nRF52 SoC).

We are able to flash the module via SWDIO/SWCLK connected to the debug out connector of the nRF52DK. After the firmware is correctly flashed via nRFGo studio, the application is running (it is advertising and we see our debug messages in RTT viewer).

Unfortunately, when the debugger is not connected i.e: only power is applied to the module, nothing happens: no advertising nor debug messages in RTT viewer.

Do you have any idea where I can have a look in order to be able to run the firmware without the debugger connected.

Thanks in advance

[butch]

Maybe I am confused but: doesn't the RTT viewer communicate via SWDIO/SWCLK? So how could it display debug messages if that is disconnected? Yes, the fact that it is not advertising is strange. Is there an LED you can flash? How do you handle faults/exceptions? What is the power supply when flashing versus your other configuration?