SpringCore
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  •  Technical data
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        • CCID (PCSC)
        • $SCRDR
        • JSON
      •  UDP Server
        • $SCRDR
        • JSON
      •  MQTT Client
        • Configuration
        • Topics
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        • Smart Reader
      •  HTTP Client
        • $SCRDR
        • JSON
        • IWM2 Legacy
  •  Host Protocols
    •  Direct Protocol
      • Protocol and format
      • Encapsulation within CCID
      • List of CLAsses
      • List of STAtus
      • Secure Communication
      •  PROTOCOL class
        • PING
        • PING EVENT
        • GET DESCRIPTOR
        • STAY QUIET
        • CLEAR QUIET
        • AUTHENTICATE
        • CHANGE KEY
        • SET SERIAL PARAMETERS
        • HOST EVENT POLL
      •  BARCODE class
        • GET CURRENT MODE
        • GET SCAN ENGINE
        • GET SYMBOLOGY
        • SET SYMBOLOGY
        • RESET SYMBOLOGY
      •  CONTROL class
        • List of INStructions
        • List of STAtus
        •  Queries
          •  GET DATA
            • HARDWARE CHARACTERISTICS
            • NETWORK STATE
            • POWER STATE
            • BATTERY DATA
            • TEMPERATURES
            • VOLTAGE AND CURRENT
            • DEVICE STATE
          • BENCHMARK CLEAR
          • BENCHMARK GET
          • GET NETWORK STATS
          • GET BLE STATS
        •  Actions
          • RESET
          • REMOTE DISCONNECT
          • SHUTDOWN
          • PRODUCT SPECIFIC
          • IBEACON
          • CERTIFICATION TESTS
          • COMMON ACTION
        •  IOs and UI
          • I2C READ
          • I2C WRITE
          • GET MODE
          • GET GPIOS
          • SET GPIOS
          • GET CONTROLS
          • PLAY SEQUENCE
          • SET LED RGB
          • SET LEDS
          • SET BUZZER
          • SET LIGHT
          • PLAY SEQUENCE STRING
          • AUTO DIMM LIGHT
          • AUTO SEQUENCES
          • WINK
          • LED modes
        •  Configuration
          • READ FREE REGISTER
          • READ REGISTER
          • WRITE REGISTER
          • LOAD FACTORY CONFIG
          • SAVE FACTORY CONFIG
          • GET DATETIME
          • SET DATETIME
          • MICORE
          • RELOAD CONFIG
        •  CCID
          • CCID GET SLOT NAME
          • CCID STOP SLOT
          • CCID START SLOT
          • CCID CONTROL SLOT
        •  NFC modes
          • NFC POLLER
          • NFC LISTENER
          • NFC HCE STOP
          • NFC HCE START
        •  Reader
          • READER STOP
          • READER ONCE
          • READER START ONE
          • READER START
          • DIRECT OUTPUT ENABLE
          • DIRECT OUTPUT DISABLE
          • BARCODE STOP
          • BARCODE ONCE
          • BARCODE START ONE
          • BARCODE START
        •  PKI
          • GET PKI SUBJECT
          • READ PKI CERTIFICATE
          • WRITE PKI CERTIFICATE
        •  Authenticity
          • IS SEAL GENUINE
          • GET SEAL SUBJECT
          • READ SEAL SIGNATURE
          • WRITE SEAL SIGNATURE
      •  ATCRYPTO class
        • INIT
        • BLANK
        • SET KEY USER
        • SET KEY ADMIN
        • SET PRIVATE KEY
        • GENERATE PRIVATE KEY
        • GET PUBLIC KEY
        • SIGN
        • HASH AND SIGN
        • ECDH
        • GET CSR
        • GET CSR EX
      • SAM AV class
      • HCE class
      • READER class
      •  DFU class
        • List of INStructions
        • List of STAtus
        • GET CONTEXT
        • RESET
        • PUSH TO STORAGE and PUSH TO STORAGE FAST
        • DUMP STORAGE
        • CLEAR STORAGE
        • PUSH TO STORAGE CANCEL
        • PUSH TO ROM
        • Format of Firmware files
      • ECHO class
      • LOGGING class
    •  CCID Protocol (PCSC)
      • Non-USB Control
      • Non-USB Notifications
    • HID Protocol (RFID Scanner)
    •  Smart Reader Protocols
      •  TLV Protocol
        •  $SCRDR Messages
          • $SCRDR Message
          • $SCCMD Message
        •  JSON Messages
          • META Message
          • STATUS Message
          • READER EVENT Message
          • READER COMMAND Message
        •  MK1 Protocol
        • SpringProx Legacy Protocol
      •  PCSC Operation
        •  Standard and API
          • Standard
          • API
          • NET library
        •  PCSC-enabled systems
          •  Windows
            • USB
            • Bluetooth
            • Network
          •  Linux
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          •  Mac OS X
            • USB
        •  PCSC-like libraries
          • Android
          • iOS
          • Windows NET
        •  APDU Interpreter
          • Command list
          • Status Words
          •  Standard instructions
            • GET DATA
            • READ BINARY
            • UPDATE BINARY
            • LOAD KEY
            • GENERAL AUTHENTICATE
            • GET CHALLENGE
          •  Vendor instructions
            • CONTROL
            •  SLOT CONTROL
              • SLOT CONTROL CL
              • SLOT CONTROL CT
            • MIFARE CLASSIC READ
            • MIFARE CLASSIC WRITE
            • MIFARE CLASSIC VALUE
            •  RFID
              •  HCE
                • POLL HCE
                • PUSH HCE
                • CONTROL HCE
              •  SE
                • ATECC SIGN
                • ATECC LOAD KEY
                • ATECC GEN KEY
                • ATECC GET PUB
                • ATECC HASH SIGN
                • ATECC DH
              • ECHO
              • ENCAPSULATE
          • Direct Protocol
        •  Smart Reader Operation
          •  Template engine
            • Technology Selector register
            • Output Format register
            • Output Prefix register
            • Options register
          •  NFC Templates
            • ID Only
            • ISO Data
            • NDEF Data
            • Desfire ID
            • Desfire Data
            • Mifare UltraLight
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            • Mifare Plus SL3
            • ISO 15693 Memory
            • EM4134 Memory
            • SpringBlue
            • Orange NFC Retail
            • Orange NFC Office
            • STid Mobile ID NFC
            • Apple VAS
            • Google SmartTap
            • PAN
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            • Navigo
          •  BLE Template
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            • Orange Pack ID
            • STid Mobile ID BLE
          •  Python engine
            • startup script
            • processNfc script
            • output script
            •  springcore module
              • springcore
            •  springcore scard module
              • springcore.scard
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            • logging module
            • utils module
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                •  Internals
                  • Firmware ID
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                  • DAUGHTER BOARD CRC
                  • WIFI FIRMWARE CRC
                  • ACIO MODULE CRC
                  • USER CODE CRC
                  • HW AutoDetect
                •  Custom integrations
                  • Brand ID
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                  • Factory Public Key
                  • Factory Read Key
                  • Master Card AID
              •  Configuration
                •  Inventory
                  • Configuration GUID
                  • Inventory ID
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                  • Rfu3
                  • Rfu4
                  • Rfu5
                  • Rfu6
                  • Rfu7
                •  License
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                  • RfuB
                  • RfuC
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                  • RfuF
                •  Contactless
                  • General
                  • CCID Protocols
                  • CCID Bitrates
                  • CCID Protocol level
                  • CCID ATR rules
                  • Compliance
                  • Advanced power control
                  • VASUP frame
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                  • NFC-B specific options
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                  • Advanced NFC timings
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                •  Bluetooth
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                  • User Device Name
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                  • iBeacon UUID
                  • custom integration
                  • custom integration settings
                  • custom integration settings 2
                •  Barcode
                  • General
                •  Smartcards
                  • Main slot
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                  • ATR default
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                •  Network
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                  • CCID host timers
                  • APDU interpreter
                •  Main configuration
                  • Profile
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                  • USB BLE switching
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                  • Battery storage guard
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                •  User interface
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                  • Tag emulation message
                •  Security
                  • Access Conditions
                  • Authentication counters
                  • Master Options
                  • Master Key ID
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                  • Master Public Key
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                  • ECC User Key
                  • ECC Admin Key
                  • User Password
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              •  Statistics
                • Startup count
                • Clean shutdown count
                • Clean restart count
                • Suspend count
                • Resume count
                • Operating mode change count
                • By host config change count
                • By Master Card config change count
                • Upgrade reset count
                • Factory reset count
                • Flash blocks erase Count
                • Power on charger time
                • Power on battery time
                • Power on USB time
                • Power on POE time
                • Battery charge cycles
                • Battery change count
                • Battery voltage min
                • Contactless discover count
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                • ID-1 insertion count
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                • SAM B insertion count
                • SAM C insertion count
                • SAM D insertion count
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                • BGM FW upgrade count
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                • Daugther Board upgrade count
                • Wifi firmware upgrade count
                • ACIO firmware upgrade count
                • Micore settings change count
                • Firmware panic count
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                • Fault reset count
                • Micore fault count
                • BGM fault count
                • Temperature alert count
                • Temperature fatal count
                • Last error
            •  Secure Elements
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                • Key mapping
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              •  Certificate Store
              •  Appendixes
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                      •  TLS client with MQTT
                        • Device certificate and public key
                        • Sample configurations as MQTT-TLS client
                        • Connecting to your own MQTT-TLS server
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                  Non-volatile memory Configuration Inventory Rfu4

                  September 3, 2025 at 8:35 AM

                  #Rfu4

                  Address : 0204 (bank 2, register 04)

                  Size : 1 byte

                  Default : 00

                  false

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