Hello,
I use the method, armgcc.
The commends "make flash_softdevice" and "make flash" echo the below. It seems OK. But I cannot see the app "/nRF5_SDK_12.3.0_d7731ad/examples/ble_peripheral/ble_app_beacon/pca10028/s130/armgcc" in the nrf Connect Mobile. What can be done wrong? Is there something missing?
...
Erasing page at address 0x1AC00.
Applying system reset.
Checking that the area to write is not protected.
Programming device.
nrfjprog --reset -f nrf51
Applying system reset.
Run.