Bluetooth phone connection can be observed using both the voltage (V), current (A), frequency (Hz), the power factor (the PF), watts (W), volt-ampere (VA).
According to the above measured values simultaneously , calculate the electricity fee used during the time (KW-H)
使用手機藍芽連線,可觀測使用產品的電壓(V),電流(A),頻率(Hz),功率因數(PF),瓦特(W),伏安(VA).
同時根據以上量測值,計算出時間內使用的電費(KW-H)