practical issues in nrf52840 dongle

[sivaguru]

I initially loaded blinky program in pca10059 using nrfconnect, everything is perfectly working ,

later I have to work in openthead cli uart for which I changed uart pin configuration in pca10056 example coding (<root foalder> \nRF5_SDK_for_Thread_and_Zigbee_v4.1.0_32ce5f8 \examples \thread\cli\ftd\uart\pca10056\blank\ses) and loaded in pca10059, since it involves memory issues I burnt pca10059 using jlink and UART commands are working properly.

since then dongle  can be programmed only through jlink , I erased the  program (pressed the reset key while inserting in USB slot)and still it is not get detected in nrfconnect software for bootloading through usb. 

it can be programmed through jlink and UART commands works properly after this , U have any idea where I went wrong or how to solve the issue 

[Marjeris Romero]

since then dongle  can be programmed only through jlink , I erased the  program (pressed the reset key while inserting in USB slot)and still it is not get detected in nrfconnect software for bootloading through usb. 

 Hi,

This is not correct. You can program the nRF52840 dongle via JLink only when using an external debugger. The easiest way to program the dongle will be to program it over USB DFU with nRF Connect Programmer app.

Pressing the reset key while inserting in the USB slot will not erase the program. Pressing the RESET button on the dongle will make the dongle entered the bootloader mode, and the led LD2 will pulse in red.

Please take a look at the 'nRF52840 Dongle programming Tutorial' on Devzone and the 'Programming' section in the nRF52840 Dongle infopages on the nordicsemi infocenter.

BR,

Marjeris