Table 2.

Normal-mode and low-power mode power consumption of the RPi (Model 3B+ in this work).

Functionalities	Normal Mode	Low Power Mode Savings
Bluetooth + Wi-Fi	On	Off, 0.2 W reduction
Soundboard	On	Off, 0.2 W reduction
Ethernet + USB	On	Off, 1.2 W reduction
HDMI	On	Off, 0.15 W reduction
Energy usage (idle state)	2.8–2.9 W	1.6–1.8 W reduction 1.1–1.2 W total consumption