During the tests with the LORAWAN_OTAA example, using the RAK3172 Breakout Board, the current in sleep mode varied according to the supply voltage.
Using the same board with the same software, I powered it with 3.6V, 3.3V and 3.0V and I noticed that the current in sleep mode are different.
The measurements I got:
3.6V = 21.50uA;
3.3V = 2.71uA;
3.0V = 0.0uA.
I don’t know if this is an error on my PPK II Nordic current meter, but would this current variation be normal?
Figure 1: setup
Figure 2: RAK3172 breakout board connections
Figure 3: Debug serial monitor
Figure 4: 3.6V current consumption
Figure 5: 3.6V current consumption (zoom)
Figure 6: 3.3V current consumption
Figure 7: 3.3V current consumption (zoom)
Figure 8: 3.0V current consumption
Figure 9: 3.3V current consumption (zoom)