RN - 17 1-XV -DS
RN-171-XV 802.11 b/g Wireless LAN Module
Features
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Drop-in Wi-Fi solution for existing systems that
currently use 802.15.4 modules
Based on Roving Networks’ robust RN-171 Wi-Fi
module
Based on a pseudo-standard footprint
On-board TCP/IP stack provides Internet access to
every node
No custom profiles needed
Ultra-low power: 4-uA sleep, 40-mA Rx, 180-mA Tx
at 10 dBm
Configurable transmit power: 0 to +12 dBm
Hardware interface: TTL UART
Data rate: 464 Kbps using hardware flow control
Through-hole board simplifies system integration
8 general purpose digital I/O pins
3 analog sensor interfaces
Real-time clock for wakeup and time stamping
Complete TCP/IP networking stack
Wi-Fi Alliance certified for WEP, WPA, and
WPA2-PSK
WPS mode for easy configuration
FCC/CE/ICS certified and RoHS compliant
Description
The RN-171-XV is a 802.11 b/g solution especially
designed for designers who want to migrate their existing
802.15.4 architecture to a more standard TCP/IP-based
platform without redesigning their existing hardware.
Based on a pseudo standard footprint often found in
embedded applications, the Roving Networks’
RN-171-XV module provides Wi-Fi connectivity using
802.11 b/g standards in legacy and existing designs that
may have been based upon the 802.15.4 standard.
The RN-171-XV module is based on Roving Networks'
robust RN-171 Wi-Fi module and incorporates an
802.11 b/g radio, a 32-bit SPARC processor, a TCP/IP
stack, a real-time clock, a crypto accelerator, power
management unit, and an analog sensor interface.
The module offers additional functionality through its on-
board programmable GPIO pins (10) and ADCs (8). The
ADCs provide 14-bit resolution while the GPIOs can be
configured to provide standard functionality or status
signaling to a host microcontroller, reducing the need for
serial polling between the Wi-Fi module and host
microcontroller.
The module is pre-loaded with firmware to simplify
integration and minimize applications development time.
In the simplest configuration, the hardware only requires
four connections (PWR, TX, RX, and GND) to create a
wireless data connection.
Applications
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Industrial metering
HVAC control
Room temperature sensors
Pump configuration and control
Telemetry
PV/solar controllers
Robotics
www.rovingnetworks.com
Version 1.04 10/29/2012
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RN - 17 1-XV -DS
OVERVIEW
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Host data rates up to 460 Kbps over the UART
Intelligent built-in power management with programmable wakeup events (timers and I/O)
Real-time clock for time stamping, auto-sleep, and auto-wakeup modes
Configuration over Wi-Fi or UART using simple ASCII commands
Supports over the air firmware upgrade via FTP
Secure Wi-Fi authentication via WEP, WPA-PSK (TKIP), and WPA2-PSK
Built-in networking applications: DHCP, DNS, ARP, ICMP UDP, Telnet, FTP client, and HTML client
Configurable transmit power of 0 to 12 dBm
WPS mode for easy and secure wireless setup
Built-in HTML web client to send GPIO, UART, and sensor data to remote web servers
The module’s size is:
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Size—0.96”
x 1.15”
Weight—5.5
g
Tables 1 through 5 provide detailed specifications for the module.
Table 1. Environmental Conditions
Parameter
Temperature Range (Operating)
Temperature Range (Storage)
Relative Humidity (Operating)
Relative Humidity (Storage)
RN-171-XV
-40 C ~ +85 C
-40 C ~ +85 C
≤90%
≤90%
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Table 2. Electrical Characteristics
Supply Voltage
Input Power
Power
Consumption
Sleep
Standby (doze)
Connected (idle, RX)
Connected (TX)
4
15
40
180 at 10 dBm
uA
mA
mA
mA
Min
3.0
Typ.
3.3
Max.
3.7
Units
V
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RN - 17 1-XV -DS
Table 3. Analog Sensor Inputs
Parameter
Sensor 0, 1, 2, 3 wakeup detect threshold
A/D sensor 0 - 4 measurement range
Precision
Accuracy
Minimum conversion time
Sensor power (pin 33) output resistance 3.3 V
500 mV
0 - 400 mV
14 bits = 12 uV
5% un-calibrated, .01% calibrated
35 uS (5 kHz over Wi-Fi)
10 ohms, maximum current = 50 mA
Value
Table 4. Radio Characteristics
Parameter
Frequency
Modulation
Channel intervals
Channels
Transmission rate (over the air)
Receive sensitivity
Output level (Class 1)
2,402 ~ 2,480 MHz
802.11b compatibility: DSSS (CCK-11, CCK-5.5, DQPSK-2, and DBPSK-1)
802.11g: OFDM (default)
5 MHz
1 - 14
1 – 11 Mbps for 802.11b
6 – 54 Mbps for 802.11g
-83 dBm typical
0 to +12 dBm (software configurable)
Specifications
Table 5. Transmit Power
Output Power
0
2
4
6
8
10
12
802.11b (2 Mbps)
Current in mA
Note (1)
120
130
170
175
180
185
190
802.11g (24 Mbps)
Current in mA
Note (1)
135
150
190
200
210
225
240
Note:
1.
Measured at 3.3-V DC VCC. The power consumption is the average power, active during actual power consumption.
www.rovingnetworks.com
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Table 6 describes the LED indicators.
Table 6. RN-171-XV Evaluation Board LED Indicators
Condition
On solid
Fast blink
Slow blink
Off
Red LED
Yellow LED
Green LED
Connected over TCP
No IP address
IP address OK
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Not associated
Associated, no Internet
Associated, Internet OK
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Rx/Tx data transfer
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TYPICAL APPLICATION SCHEMATIC
Figure 1 shows a typical application schematic. RN-171-XV connector pins 13, 15, 18, and 19 can be configured as GPIO
pins or sensor inputs, depending on the installed resistors. When configured as GPIO pins, you should ONLY install
column 1 resistors. When configured as sensor inputs, ONLY stuff column 2 and column 3 resistors. The default
configuration is:
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Sensor inputs—Pins
19 and 20
GPIO—Pins
13, 15, and 18
www.rovingnetworks.com
Version 1.04 10/29/2012
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