Is it ok to buy and use those J-Link OB board to nRF51, 52?

[Jeong Hyun Seok]

I'm not sure if it's ok to ask this question. But is it ok to use the J-Link product below link?

ko.aliexpress.com/wholesale

[Jørgen Holmefjord]

Hi,

From the price, I highly doubt that these are genuine J-Links. You will most likely experience issues with using them. I would recommend getting a nRF52 DK, which includes a genuine J-Link OB debugger, that can be used for programming any nRF5x chips and boards. Then you also get a great development board for your projects.

Best regards,

Jørgen

[Jørgen Holmefjord]

This video tutorial should give you an idea. Yes, you can use nRF51 DK to program nRF52 boards.