To measure current, you must first prepare the Evaluation Kit (EK).
The suggested configurations split the power domains for the nRF21540 FEM and the rest of the EK.
Figure 1. Preparing the EK for current measurements
- To enable current measurement, remove R3.
- To restore normal kit function after measurement, solder a 0 Ω resistor on R3 or apply a jumper between pin 1 and 2 on P5.