RN4020 Bluetooth Low Energy Module User’s Guide Bluetooth® User

• Preface
  • Introduction
  • Document Layout
  • Conventions Used in this Guide
  • Recommended Reading
  • The Microchip Web Site
  • Development Systems Customer Change Notification Service
  • Customer Support
  • Document Revision History
• Chapter 1. Introduction
  • 1.1 Bluetooth Low Energy Fundamentals
    • Table 1-1: Characteristic Properties
• Chapter 2. RN4020 Command Interface
  • 2.1 RN4020 Control Lines
    • Figure 2-1: RN4020 Module Pin Diagram
      • Table 2-1: RN4020 Module Pin Description
  • 2.2 GAP Role Switching
    • Table 2-2: Role Switch Commands
  • 2.3 RN4020 UART-ASCII Command and Responses
    • Table 2-3: RN4020 UART Configuration
    • Table 2-4: Command Descriptions
    • 2.3.1 Set/Get Commands
      • Example 2-1: Set Command Format
        • Table 2-5: UART Baud Rate Settings
        • Table 2-6: SP Level/TX Power Out
        • Table 2-7: Bitmap Features
        • Table 2-8: Bitmap Services
        • Table 2-9: Connection Parameters
    • 2.3.2 Action Commands
      • Table 2-10: Bitmap of “|O” and “|I” Commands
    • 2.3.3 I2C™ Commands
      • Table 2-11: I2C™ Commands
      • 2.3.3.1 Enable I2C
      • 2.3.3.2 Disable I2C
      • 2.3.3.3 I2C EEPROM Access
      • 2.3.3.4 I2C Basic Operations
        • Table 2-12: I2C™ Events
      • 2.3.3.5 Example of Accessing the Microchip I2C EEPROM 24LC512
      • Figure 2-2: Writing Data via the I2C™ Interface
      • Figure 2-3: Reading Data via the I2C™ Interface
    • 2.3.4 PWM Commands
      • Figure 2-4: PWM Waveform
        • Table 2-13: PWM Parameters
    • 2.3.5 Characteristic Access Commands
      • 2.3.5.1 Definition of Characteristic Access Commands
      • Example 2-2: Listing Client Service and Characteristics
    • 2.3.6 Private Service Configuration Commands
      • Table 2-14: Security flags of characteristic
    • 2.3.7 Microchip MLDP Commands
      • 2.3.7.1 Microchip Low-Energy Data Profile (MLDP)
      • 2.3.7.2 MLDPv2
    • 2.3.8 RN4020 Scripting Commands
      • 2.3.8.1 RN4020 Scripting Capabilities
      • 2.3.8.2 Event Driven
        • Table 2-15: List of Events and Event Labels
      • 2.3.8.3 Comments
      • 2.3.8.4 Variables
      • 2.3.8.5 Remote Function Call
      • Example 2-3: Function Example
    • 2.3.9 RN4020 Script Commands
      • Table 2-16: “WR” Command Input Parameters and Associated Events
    • 2.3.10 Remote Command
  • 2.4 Summary of RN4020 UART Outputs
    • 2.4.1 ASCII Commands with Non-Standard Response
      • Table 2-17: Non-Standard Response for ASCII Commands
    • 2.4.2 UART Response to PIO Switches
      • Table 2-18: UART Response to PIO Events
    • 2.4.3 UART Notifications
      • Table 2-19: UART Notification
  • 2.5 Device Firmware Upgrade
    • 2.5.1 DFU Commands
• Chapter 3. Application Examples
  • 3.1 Demonstration with a Smart Device
    • 3.1.1 Setup
    • 3.1.2 Running the Demonstration
      • Figure 3-1: Discovering the RN4020 Module
      • Figure 3-2: Reading the Model Number String From the Device Information Service
      • Figure 3-3: Reading Battery Level in Battery Service
      • Figure 3-4: Notification Result of Battery Level
      • Example 3-1: User-Defined Private Services
      • Figure 3-5: Private Services Discovered After Power Cycle
      • Figure 3-6: Reading the Private Characteristic
      • Figure 3-7: Writing Values to Private Characteristics
      • Figure 3-8: Notification to Private Characteristic
  • 3.2 Connecting Two RN4020 Modules
    • 3.2.1 Configure the First Device (Module A)
    • 3.2.2 Configure the Second Device (Module B)
    • 3.2.3 Connecting the Two Devices
    • 3.2.4 Checking Server and Client Services
      • Table 3-1: Module A Server and Client Services
      • Table 3-2: Module B Server and Client Services
    • 3.2.5 Setting the Battery Service
  • 3.3 MLDP Demonstration
  • 3.4 RN4020 Scripting Demonstration
    • 3.4.1 Setting Up Private Service and Characteristics
    • 3.4.2 Script Input
    • 3.4.3 Running the Script
• Appendix A. PICtail™ Daughter Board Schematics
  • Figure A-1: RN4020 Module
  • Figure A-2: PIC18LF25K50-I/ML Device
  • Figure A-3: 28-pin and 30-pin PICtail™ Connectors
  • Figure A-4: RN4020 Module Breakout Pins
  • Figure A-5: Status LEDs
  • Figure A-6: Voltage Regulator
  • Figure A-7: Decoupling Capacitor for the PIC18LF25K50-I/ML Device
  • Figure A-8: Test Switch
  • Figure A-9: ICSP™ Connector
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