RN -17 1-DS
RN-171 802.11 b/g Wireless LAN Module
Features
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FCC/CE/IC certified 2.4-GHz IEEE 802.11b/g
transceiver
Small form factor: 1050 x 700 x 130 mil
Configurable transmit power: 0 to 10 dBm
RF pad connector for antennas
Certified antennas: chip antenna, 4” dipole, PCB
trace, and wire antenna
Ultra-low power: 4-uA sleep, 38-mA Rx, 120-mA Tx
at 0 dBm
High throughput: 921 Kbps TX, 500 Kbps RX data
rate with TCP/IP and WPA2 over UART, up to
2 Mbps over SPI slave
8-Mbit flash memory and 128-KB RAM
10 general-purpose digital I/O pins
8 analog sensor interfaces
Real-time clock for wakeup and time stamping
Accepts 3.3-V regulated power supply or 3-V
battery
Supports ad hoc and infrastructure networks
Complete on-board TCP/IP networking stack
Environmentally friendly: RoHS compliant
Description
The RN-171 module is a complete, standalone TCP/IP
wireless networking module. With its small form factor
and extremely low power consumption, the RN-171 is
perfect for mobile wireless applications such as asset
monitoring, sensors, and portable battery operated
devices. It incorporates a 2.4-GHz radio, 32-bit SPARC
processor, TCP/IP stack, real-time clock, crypto
accelerator, power management, and analog sensor
interfaces.
The module is preloaded with firmware to simplify
integration and minimize application development. In
the simplest configuration, the hardware only requires
four connections (PWR, TX, RX, and GND) to create a
wireless data connection. Additionally, the analog sensor
inputs can connect to a variety of sensors such as
temperature, audio, motion, and acceleration. The ability
to go into deep sleep mode and automatically scan and
associate to an access point when awake makes the
RN-171 suitable for roaming applications. The RN-171
also includes a built-in HTML client to post serial UART
data or sensor data to a web server automatically.
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Applications
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Remote equipment monitoring
Telemetry
Industrial sensors and home automation controls
Home automation
Figure 1. RN-171 Block Diagram
RN-171
Trace for
PCB Antenna
2.4 GHz
TX/RX
128-KB
RAM
2.4-GHz
Radio
2.4-GHz
PA
Crypto
accelerator
Sensor Interface
32-Bit
CPU
2-MB ROM
Flash
Memory
Timers
SPI
GPIO
UART
VDD IN
VDD BATT
2-KB NVM
802.11 b/g
MAC/PHY
SPI
ADC
Pwr
Mgmt
GPIO
SDIO
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RN -17 1
OVERVIEW
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Host data rates up to 921 Kbps TX, 500 Kbps RX for the UART, up to 2 Mbps over the SPI slave
Intelligent, built-in power management with programmable wakeup
Real-time clock for time stamping, auto-sleep, and auto-wakeup
Configuration using simple ASCII commands
Software controlled transmit power (0 to 10 dBm) for ultra-low-power applications
Memory: 128-KB RAM, 2-MB ROM, 2-KB battery-backed memory, 8-Mbit flash
Secure Wi-Fi authentication using WEP-128, WPA-PSK (TKIP), and WPA2-PSK (AES)
Built-in networking applications: DHCP, UDP, DNS, ARP, ICMP, TCP, and HTML client
802.11 power save and roaming functions
Castellated pads for reliable soldering
The module’s moisture sensitivity level (MSL) is 1. The modules size and weight are:
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Size—1.06
x 0.70 x 0.12 inches (27 x 18 x 3.1 mm)
Weight—0.09
oz
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
-40 C ~ +85 C
-40 C ~ +85 C
≤90%
≤90%
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Table 2. Electrical Characteristics (Provisional)
Supply Voltage
Supply voltage (VBATT option)
Digital input
Input logic high VIH
Input logic low VIL
Digital Output Drive
GPIO 4, 5, 6, 7, 8
GPIO 9, 10, 11, 12, 13
Power
Consumption
Sleep
Standby (doze)
Connected (idle, RX)
Connected (TX)*
0 dBm
12 dBm
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4
15
40
120
190
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uA
mA
mA
mA
mA
24
8
mA
mA
2.3
1.0
VDC
VDC
Min.
3.0
Typ.
3.3
Max.
3.7
Units
VDC
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RN -17 1
Table 3. Analog Sensor Inputs
Parameter
Sensor 0, 1, 2, 3 wakeup detection threshold
AD sensor 0 - 7 measurement range
Resolution
Accuracy
Minimum conversion time
Sensor power (pin 33) output resistance 3.3V
500 mV
0 - 400 mV
(Do not exceed 1.2-V DC)
14 bits = 12uV
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 (class1)
2,402 ~ 2,480 MHz
802.11b compatibility: DSSS (CCK-11, CCK-5.5, DQPSK-2, 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
-2 dBm to +12 dBm (configurable via software)
Specifications
Table 5. Transmit Power
Output Power
0
2
4
6
8
10
12
802.11 b (2 Mbps)
Current in mA
Note (1)
120
130
170
175
180
185
190
802.11 g (24 Mbps)
Current in mA
Note (1)
135
150
190
200
210
225
240
Note:
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Measured at 3.3-V DC VCC. The power consumption is the average power, active during actual power consumption.
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