Why my custom board can't be detected by jlink after download softdevice

[GuoZhirong]

I make a custom board with nRF52832, the nRFgo Studio can find the device before I download anything, then I down do erase all and download the softdevice132, after this I want to download the app to the board, but it failed, I found the Jink can't detect the device;

[billywalton]

I am having this exact problem,

I solder down a nRF52832, power up, draws just over 4mA

i use nrfprog to erase, all erased ok

i use nrfprog to flash softdevice, it flashes, then afterwards current drops off to low uA

Now i cant connect using nrfprog, just get a message saying "cannot connect to any nRF device"

I thought the first time i have a board problem, so i checked everything, hot-air removed the nRF52832, put a new one down and exactly the same thing has happened again

Its a custom board

softdevice 132

jlink can not now detect the device

any ideas?

thanks

[Susheel Nuguru]

since you say that your device is consuming very less power. Most likely, it is going to system_off mode where the debugger wont be able to connect to it unless you make it come out of deep sleep. Try

> nrfjprog --recover -f nrf52