2-KB NVM
RN-131-DS
RN-131G & RN-131C 802.11 b/g Wireless LAN Module
Features
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
Small, compact surface-mount module
On-board ceramic chip antenna and U.FL
connector for external antenna
8-Mbit flash memory and 128-KB RAM
Description
UART hardware interface
10 general-purpose digital I/O pins The RN-131 module is a standalone, embedded
wireless 802.11 b/g networking module. With its small
8 analog sensor interfaces
form factor and extremely low power consumption, the
Real-time clock for wakeup and time stamping
RN-131 is perfect for mobile wireless applications such
Accepts 3.3-V regulated or 2 to 3 V battery
as asset monitoring, GPS tracking, and battery sensors.
Supports ad hoc and infrastructure networking
The WiFly module incorporates a 2.4-GHz radio,
modes
processor, TCP/IP stack, real-time clock, crypto
On board ECOS -OS, TCP/IP stacks
accelerator, power management, and analog sensor
Wi-Fi Alliance certified for WPA2-PSK interfaces as shown in Figure 1. The module is
preloaded with software to simplify integration and
FCC/CE/ICS certified and RoHS compliant.
minimize application development. In the simplest
Industrial (RN-131G) and commercial (RN-131C)
configuration, the hardware requires only four
grade temperature options
connections (PWR, TX, RX, and GND) to create a
wireless data connection. Additionally, the sensor
interface provides temperature, audio, motion,
Applications
acceleration, and other analog data without requiring
Remote equipment monitoring
additional hardware. The module is programmed and
Telemetry controlled with a simple ASCII command language.
Once the module is set up, it can scan to find an access
Industrial sensors and home automation controls
point, associate, authenticate, and connect over any
Medical device monitoring
Wi-Fi network.
Figure 1. RN-131 Block Diagram
RN-131
On-Board Chip
Antenna
128-KB 32-Bit
2-MB ROM
Flash
RAM CPU
2.4 GHz Memory
TX/RX
2.4-GHz Timers
Radio
802.11 b/g
U.FL Connector
MAC/PHY SPI
for Optional External
SPI
2.4-GHz GPIO
Antenna
PA UART
VDD IN
VDD BATT
GPIO
Crypto Pwr
ADC
accelerator Mgmt
3.3-V Boost
SDIO Boost
Sensor Interface EPC/RFID Regulator
Enable
www.rovingnetworks.com Version 3.2r 4/9/2012 1 RN-131-DS
OVERVIEW
Host data rate up to 1 Mbps for the UART
Intelligent, built-in power management with programmable wakeup
Real-time clock for time stamping, auto-sleep, and auto-wakeup
Configuration over UART using simple ASCII commands
Remote configuration over WiFi using Telnet
Supports over the air firmware upgrade (FTP)
Supports WPS pushbutton mode for easy association with access points
Secure WiFi authentication using WEP-128, WPA-PSK (TKIP), or WPA2-PSK (AES)
Built-in networking applicationsDHCP, UDP, DNS, ARP, ICMP, TCP, HTTP client, and FTP client
802.11 power saving and roaming functions
The modules size and weight are:
Size1.49 x 0.78 x 0.15 (37mm x 20 mm x 3.5 mm)
Weight0.140 oz
Tables 1 through 4 provide detailed specifications for the module.
Table 1. Environmental Conditions
Parameter RN-131G RN-131C
o o o o
Temperature Range (Operating) -30 C to +85 C 0 C to +70 C
o o o o
Temperature Range (Storage) -40 C to +85 C -40 C o +85 C
Relative Humidity (Operating)
90% 90%
Relative Humidity (Storage)
90% 90%
Table 2. Electrical Characteristics
Supply Voltage Min Typ. Max. Unit
Supply voltage VDD 3.0 3.3 3.7 VDC
Supply voltage (VBATT option) 2.0 3.0 3.3 VDC
Pin 21 switched 3.3 V output 150 mA
Digital input
Input logic high VIH 2.3 V VDC
Input logic low VIL 1.0 V VDC
Digital output drive
GPIO 4, 5, 6, 7, 8 24 mA
GPIO 9, 10, 11, 12, 13 8 mA
Power consumption
Sleep 4 uA
Standby (doze) - 15 - mA
Connected (idle, RX) 40 mA
Connected (TX) 140 212 mA
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