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