RN4020Bluetooth® Low Energy ModuleFeatures • Fully certified Bluetooth® version 4.1 module • On-board Bluetooth Low Energy 4.1 stack • ASCII command interface API over UART • Device Firmware Upgrade (DFU) over UART or Over the Air (OTA) • Microchip Low-energy Data Profile (MLDP) for serial data applications • Remote commands over-the-air • 64 KB internal flash • Compact form factor: 11.5 x 19.5 x 2.5 mm • Castel ated SMT pads for easy and reliable PCB mounting • Environmentally friendly, RoHS compliant • Certifications: FCC, IC, CE, QDID, VCCI, KCC, and Applications NCC • Health/Medical Devices - Glucose meters Operational - Heart rate - Scale • Single operating voltage: 1.8V to 3.6V (3.3V typical) • Sports Activity and Fitness • Temperature range: -30°C to 85°C - Pedometer • Low-power consumption - Cycling computer • Simple, UART interface - Heart rate • Integrated Crystal, I2C Interface, Internal Voltage • Retail Regulator, Matching Circuitry, and PCB Antenna - Point of Sale (POS) • Multiple IOs for control and status - Asset tagging and tracking • GPIO , ADC - Proximity advertising • Three Pulse Width Modulation (PWM) outputs • Beacon Applications • Internet of Things (IoT) Sensor tag RF/Analog Features • Remote Control • ISM Band 2.402 to 2.480 GHz operation - Embedded Device Control • Channels 0-39 - AV consoles and game controllers • RX Sensitivity: -92.5 dBm at 0.1% BER • Wearable Smart Devices and Accessories • TX Power: -19.0 dBm to +7.5 dBm • Industrial Control • RSSI Monitor - Private (custom) services - Low bandwidth cable replacement MAC/Baseband/Higher Layer Features • Smart Energy/Smart Home • Secure AES128 encryption Description • GAP, GATT, SM, L2CAP, and integrated public profiles Microchip’s RN4020 Bluetooth Low Energy Module pro- • Create custom services using command API vides a highly integrated solution for delivering low-power • Keyboard I/O Authentication Bluetooth 4.1 solutions. The advanced command inter- • Software configurable role as peripheral or central face offers rapid time to market. The RN4020 module and client or server complies with Bluetooth specification version 4.1. The • Built-in scripting capabilities for hostless operation module integrates RF, a baseband controller, and a com- mand API processor, making it a complete Bluetooth Low Energy solution. The RN4020 can be used with ultra-low cost microcontroller for intelligent Bluetooth Low Energy applications. For simple sensor applications, the RN4020 internal scripting capabilities enable basic functions to be implemented without the need for external host MCU or software development tools. 2015 Microchip Technology Inc. DS50002279B-page 1 Document Outline Features Operational RF/Analog Features MAC/Baseband/Higher Layer Features Applications Description 1.0 Device Overview FIGURE 1-1: RN4020 Top View FIGURE 1-2: RN4020 Pin Diagram FIGURE 1-3: RN4020 Block Diagram TABLE 1-1: Pin Description 2.0 General Specifications TABLE 2-1: General Specifications TABLE 2-2: Weight and Dimensions TABLE 2-3: Electrical Characteristics TABLE 2-4: Current Consumption TABLE 2-5: Current Consumption vs RF TX Power 3.0 Microcontroller to RN4020 Interface 3.1 CTS/RTS Hardware Flow Control 3.2 Microchip Low-energy Data Profile (MLDP) FIGURE 3-1: Interface Description 4.0 Physical Dimensions FIGURE 4-1: RN4020 Module Dimensions FIGURE 4-2: RN4020 Recommended PCB Footprint FIGURE 4-3: RN4020 Module Mounting Details FIGURE 4-4: RN4020 HOST PCB EXAMPLE Layout 5.0 Typical Application Schematic FIGURE 5-1: RN4020 Typical Application Schematics 6.0 ASCII Command API 7.0 Supported Services TABLE 7-1: Supported Public Services on RN4020(1) 7.1 Public and Private Services 7.2 PCB Antenna TABLE 7-2: Antenna Characteristics FIGURE 7-1: Efficiency FIGURE 7-2: Antenna Plot FIGURE 7-3: 3D Radiation Pattern And Antenna Orientation 7.3 Soldering Recommendations 8.0 Regulatory Approval 8.1 United States 8.2 Canada 8.3 Europe TABLE 8-1: RN4020 European Compliance Testing 8.4 Australia 8.5 New Zealand 8.6 Japan 8.7 Korea 8.8 Taiwan 9.0 Ordering Information TABLE 9-1: Ordering Information Bluetooth® Low Energy Module Most Current Data Sheet Errata Customer Notification System Appendix A: Revision History Revision A (June 2014) Revision B (September 2015) The Microchip Web Site Customer Change Notification Service Customer Support AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Worldwide Sales and Service