I want to solder the nano 33 ble board on a PCB. The castellated pins on the sides are easy, but what if the SWD connections under the board are to be used?
I see how this can be done when you can use wave soldering, but I do not have access to such a system. And this is only for prototyping.
I normally use a heatgun and a preheater to preheat the mother PCB. This works fine, but how to solder the SWD connections below the Nordic unit without desoldering the Nordic unit in the process?
Is there anybody who can give me a few pointers?
Thanks in advance,