Hi Rick.
frdm-kl02z already integrated OpenSDA USB (J2) on board. why do you use SWD (J1) to debug ?

here is the video of how to get started with FRDM-KL02Z
Freedom Development Platform for Kinetis KL02|NXP
the default firmware of OpenSDA USB is P&E open SDA. in case it is corrupt, you can use attached MSD-DEBUG-FRDM-KL02Z_Pemicro_v114.SDA to have it update.
if you want to use J1 anyway, please make sure the connector is soldered well and also provide external power supply to the board meanwhile.
Have a great day,
Jennie Zhang
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