RN -17 1-EK-DS
RN-171-EK Evaluation Board
Features
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Ultra-low power: 4-uA sleep, 40-mA Rx, 180-mA
Tx at 10 dBm
Configurable transmit power: 0 to +12 dBm
UART hardware interfaces and SPI slave
Up to 1 Mbps data rate over UART
Powered by battery pack (2 AAA batteries) or via
USB cable
Pushbuttons for AP/WPS mode and reset signals
10 general-purpose digital I/O pins
8 analog sensor interfaces; configurable sensor
power outputs 0 to 3.3-V DC
Real-time clock for wakeup and time stamping
Complete on-board TCP/IP networking stack
Wi-Fi Alliance certified for WPA2-PSK
FCC/CE/ICS certified and RoHS compliant
Description
The RN-171-EK evaluation board is a field-ready, Wi-Fi Alliance
certified, 802.11 prototyping platform for the RN-171 module.
The board has the flexibility to connect directly to PCs via a
standard USB interface (via FTDI chipset) or to embedded
processors through the TTL UART interface. The RN-171-EK
contains a battery boost circuit, which makes it possible to
power the board using two AAA batteries (the input voltage can
go down to 2.0 V DC when using the battery boost circuit). The
battery boost circuit makes the RN-171-EK perfect for battery-
powered applications such as sensors, data acquisition
systems, controllers, etc. The status LEDs and jumpers enable
rapid prototyping and integration into existing systems.
The RN-171-EK is based on the Roving Networks RN-171
module. The RN-171 module incorporates a 2.4-GHz radio,
processor, full TCP/IP stack, real-time clock, and supports the
FTP client, DHCP, DNS, and HTML client protocols. The
module supports ad hoc and infrastructure networking modes.
The analog sensor interface provides direct connections to read
the sensors’ temperature, acceleration, and other analog data
without requiring an external microprocessor. The RN-171
module is programmed and controlled from a console with a
simple ASCII command language. Once the configuration is set
up, the module can automatically scan to find an access point,
associate, authenticate, and connect over any Wi-Fi network.
Additionally, the module can automatically wake up, send data
to a remote host, and go back to a low-power sleep state.
Applications
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Wireless serial connections
Remote sensors
Telemetry
Security
Industrial sensors and controls
Home automation
www.rovingnetworks.com
Version 1.0 9/18/2012
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RN -17 1-EK-DS
OVERVIEW
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Host data rates up to 921 Kbps TX, 500 Kbps RX for UART
Intelligent, built-in power management with programmable wake-up 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
Over the air firmware upgrade via FTP
Secure Wi-Fi authentication: WEP, WPA-PSK (TKIP), and WPA2-PSK (AES)
Built-in networking applications: DHCP, DNS, ARP, ICMP UDP, Telnet, FTP client, and HTML client
Supports WPS push-button mode for easy network configuration
Can act as an access point
The evaluation board’s moisture sensitivity level (MSL) is 1; its size and weight are:
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Size—50.8
mm x 28 mm x 21 mm
Weight—13.5
g
Tables 1 through 5 provide detailed specifications for the evaluation board.
Table 1. Environmental Conditions
Parameter
Temperature range (operating)
Temperature range (storage)
Relative humidity (operating)
Relative humidity (storage)
o
Value
-45 C ~ 85 C
-45 C ~ 85 C
≤90%
≤90%
o
o
o
Table 2. Electrical Characteristics
Supply Voltage,
Note (1)
Power connector (J7)
UART interface (J4)
USB interface (J6)
Power
consumption
Sleep
Standby (doze)
Connected (idle, RX)
Connected (TX)
-
4
15
40
180 at 10 dBm
-
uA
mA
mA
mA
Min
2.0
(1)
3.0
5.0
Typ.
3.3
3.3
Max.
16
(1)
3.6
16
Unit
V
V
V
Notes:
1.
Supply voltage range varies depending upon the header used. See “Design Concerns” on page 5 for more details.
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Version 1.0 9/18/2012
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RN -17 1-EK-DS
Table 3. Analog Sensor Inputs
Parameter
Sensor 0, 1, 2, and 3 wake-up detection threshold
AD sensor 0 - 7 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% uncalibrated, .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, 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
802.11 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
Notes:
1.
Measured at 3.3-V DC input. The power consumption is the average power, active during actual power consumption.
BOARD DESCRIPTION
Figure 1 describes the evaluation board’s connectors and interfaces. Table 6 describes the LED indicators.
www.rovingnetworks.com
Version 1.0 9/18/2012
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RN -17 1-EK-DS
Figure 1. RN-171-EK Evaluation Board
LED Indicators
PCB Trace
Antenna
UART Interface
(J4)
AP/WPS/Factory Reset
Pushbutton (GPIO9)
Sensor
Interface (J5)
Reset
Pushbutton
RX - input to evaluation board
TX - output from evaluation board
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Sensor Interface (J5)
9 8 7 6 5 4 3 2 1
UART Interface
(J4)
1
2
3
4
5
6
7
8
9
10
11
12
13
Description
3.3 VDD
GND
UART RX
UART TX
UART RTS
UART CTS
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8,
(1)
GPIO9
RESET
Pin
1
2
3
4
5
6
7
8
9
Description
Sensor Power
Sensor 4 (3.3-V tolerant)
Sensor 5 (3.3-V tolerant)
Sensor 7 (1.2 V only)
Sensor 5 (1.2 V only)
Sensor 4 (1.2 V only)
Sensor 6 (1.2 V only)
Sensor 3 (1.2 V only)
GND
WARNING: Voltage on pins marked
1.2 V
Only
should not exceed 1.2 V or
permanent damage will occur.
Note:
1.
The RN-171 module drives GPIO8 HIGH on powerup, which overrides software configured powerup values, such as
set sys value
0x0000
on GPIO8.
www.rovingnetworks.com
Version 1.0 9/18/2012
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RN -17 1-EK-DS
Table 6. RN-171-EK Evaluation Board LED Indicators
Condition
On solid
Fast blink
Slow blink
Off
Blue LED
Not used
Not used
Not used
Not used
Red LED
Yellow LED
Green LED
Connected over TCP
No IP address
IP address OK
-
-‐
Not associated
Associated, no Internet
Associated, Internet OK
-‐
Rx/Tx data transfer
-‐
-‐
PHYSICAL DIMENSIONS
Figure 2 shows the evaluation board’s physical dimensions.
Figure 2. RN-171-EK Physical Dimensions
28
50.8
21
Battery Pack
All Dimensions Are in mm
DESIGN CONCERNS
This section provides design information, such as powering the evaluation board, sensor interface settings, ad hoc mode,
and restoring factory settings.
Powering the Module
You power the RN-171-EK evaluation board from the USB cable, the UART interface, or via the battery pack, which holds
2 AAA batteries.
NOTE:
You can provide power via the USB cable while a battery pack is installed.
www.rovingnetworks.com
Version 1.0 9/18/2012
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MEMS传感器
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