I use the OSX system, but when I want to copy the binary file into the stockage(SOC nrf52840),the usb connection will break down immediately ,what should I do?

[zhong]

all the switch is in this way.

[Martin Lesund]

Hi Zhong,

What binary file do you transfer to the nRF5280?

Could you try to flash via an IDE or via command line using nrfjprog?

[zhong]

I use mbed online compiler and after the compiler I get the result file that is a binary file, if I can transfer the file into the nrf52840 and use the button 'reset' I can see my code function on the nrf52840,but the problem is when I try to transfer the file to the nrf52840,the usb will be broken and reconnected, but my file isn't in the nrf52840

[Nguyen Hoan Hoang]

That is the normal behaviour.  Once the .bin file is flashed in via file copy.  It will reset the board automatically.  In order for you to know if your firmware workes properly is to blink a led or print something to uart.