The four-in-one smart electronic lock supports password, fingerprint, RFID card, and app remote open functions. It also supports a convenient graphical touch interface, voice reminder function, low battery warning, and external power backup. NuMicro® M251/M252 low-power microcontroller series is used to extend product execution time.

• Features
  

  -	Low-power microcontroller extends product execution time up to 12 months
  -	Floating security code and virtual bit password function
  -	Maximum record of 100 fingerprints
  -	Supports 20 sets of RFID cards
  -	Remote temporary password and Bluetooth app open

• Specifications

  -	M251 / M252 ( 32-bit Arm® Cortex®-M23)
  -	With Deep Power-down mode, power consumption is less than 1.3 μA
  -	Rich communication peripherals for a variety of external expansion modules
  -	Supports XOM (eXecute-Only Memory) and hardware AES encryption/ decryption for product security
  -	Supports high-precision ADC and OPA functions for accurate voltages

• System Block Diagram