Roving Networks RN-131G Manual
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Roving Networks RN-131G Manual

802.11 b/g wireless lan module
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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
•
UART hardware interface
•
•
10 general-purpose digital I/O pins
•
8 analog sensor interfaces
•
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
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
•
Remote equipment monitoring
•
Telemetry
Industrial sensors and home automation controls
•
•
Medical device monitoring
Figure 1. RN-131 Block Diagram
On-Board Chip
Antenna
U.FL Connector
for Optional External
Antenna
www.rovingnetworks.com
Arrow.com.
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128-KB
32-Bit
RAM
CPU
2.4 GHz
TX/RX
2.4-GHz
Radio
802.11 b/g
MAC/PHY
2.4-GHz
PA
Crypto
ADC
accelerator
Mgmt
Sensor Interface
EPC/RFID
Description
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.
RN-131
2-MB ROM
Flash
Memory
Timers
SPI
SPI
GPIO
UART
VDD IN
VDD BATT
GPIO
Pwr
3.3-V Boost
SDIO
Boost
Regulator
Enable
Version 3.2r 4/9/2012
RN -13 1-DS
 
1

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Summary of Contents for Roving Networks RN-131G

  • Page 1 RN -13 1-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 •...
  • Page 2 Size—1.49” x 0.78” x 0.15” (37mm x 20 mm x 3.5 mm) Weight—0.140 oz • Tables 1 through 4 provide detailed specifications for the module. Table 1. Environmental Conditions Parameter RN-131G RN-131C Temperature Range (Operating) C to +85 C to +70 Temperature Range (Storage)

  • Page 3: Specifications

    RN -13 1-DS   Table 3. Analog Sensor Inputs Parameter Value Sense 0,1,2,3 wakeup detect threshold 500 mV AD sense 0 - 7 measurement range 0 - 400 mV Precision 14 bits = 12 uV Accuracy 5% un-calibrated, 0.01% calibrated Minimum conversion time 35uS (5kHz over Wi-Fi) Sensor Power (pin 33) output resistance 3.3 V...

  • Page 4: Typical Application Schematic

    RN -13 1-DS   TYPICAL APPLICATION SCHEMATIC Figure 2 shows a typical application schematic. Figure 2. Application Schematic P3_3V LED_RED LED_GREEN   www.rovingnetworks.com Version 3.2r 4/9/2012 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from...
  • Page 5 RN -13 1-DS   Figure 3 shows the pin pads and Table 5 describes the pins. Figure 3. Pin Pads 44 43 42 41 39 38 37 36 14 15 16 17 19 20 21 22 Top View   (Pads Not Visible from Top) Table 5.
  • Page 6 RN -13 1-DS   Name Description Default DMA-TX Debug port (apply a 100 kΩ pull down if ultra-low sleep power is High Z required) DMA-RX Debug port No connect GPIO-9 Restore factory resets/enter ad hoc mode, 8-mA drive, 3.3-V tolerant. Input GPIO-8 GPIO, 24-mA drive, 3.3-V tolerant.
  • Page 7 RN -13 1-DS   Figure 4. Module Physical Dimensions 20 mm 2.5 mm Ceramic Chip Antenna 2.5 mm U.FL Connector 37 mm RN-131 Ceramic Chip RF Shield Antenna RF Shield 3.5 mm   Figure 5. Pad Dimensions     www.rovingnetworks.com Version 3.2r 4/9/2012 Arrow.com.
  • Page 8 RN -13 1-DS   DESIGN CONCERNS   The following sections provide information on designing with the RN-131 module, including radio interference, grounding, solder reflow, connection status, etc. Minimizing Radio Interference When integrating the WiFly module with the on-board chip antenna, ensure that the area around the chip antenna end of the module protrudes at least 6 mm from the motherboard and any metal enclosure.

  • Page 9: Grounding Recommendations

    Grounding Recommendations For the module antenna to function, pins 36 through 44 must be connected to ground. Roving Networks suggests you place the module such that 0.5 mm of theses pads is exposed. This placement provides access for soldering pins 36 through 44 from below, and provides ample clearance of the antenna from the PCB.
  • Page 10 RN -13 1-DS   Figure 8. Solder Reflow Temperature Profile   www.rovingnetworks.com Version 3.2r 4/9/2012 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...

  • Page 11: U.fl Connector

    Roving Networks recommends that you use the Hirose U.FL connector (part number U.FL-R-SMT) for connecting external antennas. If you prefer to use the SMA connector, use the Roving Networks U.FL-to-SMA cable (part number RN-UFLSMA6). Figure 10 shows the U.FL connector dimensions.

  • Page 12: Connection Status

    RN -13 1-DS   Connection Status GPIO4, GPIO5, and GPIO6 drive status the LEDs. • GPIO4 indicates the TCP/IP connection status. This signal is on high for an active connection, toggles fast to indicate no IP address, and toggles slowly to indicate that the IP address is OK but not connected. •...

  • Page 13: Sensor Interfaces

    Ad Hoc Mode & Restoring Factory Settings Ad hoc mode is controlled with GPIO9 (pin 24). Roving Networks recommends that you connect pin 24 to a switch or jumper connected to a pull up. When GPIO9 is driven high at power up, the module enters ad hoc mode. If GPIO9 is then toggled low 5 times, the module will be restored to it’s initial factory default configuration.

  • Page 14: Compliance Information

    RN -13 1-DS   COMPLIANCE INFORMATION The following sections describe the module’s FCC and NCC compliance information. FCC Compliance This equipment has been tested and found to comply with the limits for a Class digital device, pursuant to Part 15 of the FCC rules.
  • Page 15 RN -13 1-DS   Table 7. Radio Frequency Exposure Property (Units Measured) Value Units Antenna Gain Numeric Gain 1.58 Numeric Max Allowable Peak Power +23.76 Max Allowable Peak Power 237.7 Calculated Safe Distance at 1 mW/cm Minimum Separation Distance This equipment has been evaluated in accordance with the FCC bulletin 56 “Hazards of radio frequency and electromagnetic fields”...

  • Page 16: Specification

    RN-UFL-SMA6 6 inch cable with U.FL connector on one end and SMA on the other For other configurations, contact Roving Networks directly. Go to http://www.rovingnetworks.com for current pricing and a list of distributors carrying Roving Networks products.     www.rovingnetworks.com Version 3.2r 4/9/2012...
  • Page 17 RN -13 1-DS   NOTES   www.rovingnetworks.com Version 3.2r 4/9/2012 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
  • Page 18 Roving Networks products are not authorized for use in safety-critical applications Los Gatos, CA 95032 (such as life support) where a failure of the Roving Networks product would +1 (408) 395-5300 reasonably be expected to cause severe personal injury or death, unless officers of www.rovingnetworks.com...

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