RN-131-DS
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RN-131G & RN-131C 802.11 b/g Wireless LAN Module
Features
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Qualified 2.4-GHz IEEE 802.11b/g transceiver
Ultra-low power: 4 uA sleep, 40 mA Rx, 210 mA Tx
High throughput, 1 Mbps sustained data rate with
TCP/IP and WPA2
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Small, compact surface-mount module
On-board ceramic chip antenna and U.FL
connector for external antenna
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8-Mbit flash memory and 128-KB RAM
UART hardware interface
Description
10 general-purpose digital I/O pins
8 analog sensor interfaces
The RN-131 module is a standalone, embedded
wireless 802.11 b/g networking module. With its small
form factor and extremely low power consumption, the
RN-131 is perfect for mobile wireless applications such
as asset monitoring, GPS tracking, and battery sensors.
The WiFly module incorporates a 2.4-GHz radio,
processor, TCP/IP stack, real-time clock, crypto
accelerator, power management, and analog sensor
interfaces as shown in Figure 1. The module is
preloaded with software to simplify integration and
minimize application development. In the simplest
configuration, the hardware requires only four
connections (PWR, TX, RX, and GND) to create a
wireless data connection. Additionally, the sensor
interface provides temperature, audio, motion,
acceleration, and other analog data without requiring
additional hardware. The module is programmed and
controlled with a simple ASCII command language.
Once the module is set up, it can scan to find an access
point, associate, authenticate, and connect over any
Wi-Fi network.
Real-time clock for wakeup and time stamping
Accepts 3.3-V regulated or 2 to 3 V battery
Supports ad hoc and infrastructure networking
modes
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On board ECOS -OS, TCP/IP stacks
Wi-Fi Alliance certified for WPA2-PSK
FCC/CE/ICS certified and RoHS compliant.
Industrial (RN-131G) and commercial (RN-131C)
grade temperature options
Applications
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Remote equipment monitoring
Telemetry
Industrial sensors and home automation controls
Medical device monitoring
Figure 1. RN-131 Block Diagram
RN-131
On-Board Chip
Antenna
128-KB
RAM
32-Bit
CPU
2-MB ROM
Flash
Memory
2.4 GHz
TX/RX
2.4-GHz
Radio
Timers
802.11 b/g
MAC/PHY
U.FL Connector
for Optional External
Antenna
SPI
GPIO
UART
SPI
2.4-GHz
PA
VDD IN
VDD BATT
GPIO
SDIO
Crypto
accelerator
Pwr
Mgmt
ADC
3.3-V Boost
Boost
Sensor Interface
EPC/RFID
Regulator
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Version 3.2r 4/9/2012
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