Measure power consumption of RFM69HCW (radio) using oscilloscope
An oscilloscope is not designed to measure current, but rather voltage.

Therefore, to measure current, you need something which transforms current to voltage, such as:


A low value sense resistor in series with the circuit.  However, this may disturb the operation of the circuit.  Sometimes you can get this to work by adding a capacitor across the circuit being tested.
A current sense transformer or hall based current sensor
A current probe, which often clamps around one of the power leads and has its own amplifier with range selection which then feeds into the scope.


For something where the power consumption is relatively stable over time, you wouldn't use a scope at all - you'd only use it for something where the demand is pulsed and you want to see the actual waveform of current, and not just a simple time average.