BLE Power Meter

The BLE Power Meter comprises a NuMicro® M251 microcontroller and an NADC24 analog-to-digital converter. The NADC24 is a high-precision 24-bit Delta-Sigma ADC specifically designed for capturing voltage or current signals. The M251 microcontroller is responsible for reading and calculating these data, which can then be displayed in real time through a user interface (UI) showing voltage, current, and power information. Additionally, these data can be transmitted to a mobile phone for display via the BLE module.

Feature

- Line Frequency

-
RMS Voltage

-
RMS Current

- Apparent Power

- Active Power

- Reactive Power

- Power Factor

Specifications

NADC24 (24-bit ΔΣ ADC)
-	PGA Gain: 1 to 128
-	Data Rates: 1.25 SPS to 96kSPS
-	10 SPS data rate with 22-bit ENOB
-	4 external differential channels or 8 external single ended channels
-	Internal Reference Voltage Generator (1.2V /2.4 V)
-	Internal Temperature Sensor : ±2℃
-	Low power consumption : 1.38 mA
-	SPI-Compatible Interface
-	Driver up to 10 cm x 10 cm panel

System Block Diagram

Nuvoton_BLE Power Meter_EN

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BLE Power Meter

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-	Line Frequency
-	RMS Voltage
-	RMS Current
-	Apparent Power
-	Active Power
-	Reactive Power
-	Power Factor