Roving Networks RN-174 User Manual
!
www.rovingnetworks.com Version 1.3r 4/9/2012 1
RN-174-DS
RN-174 WiFly Super Module
Features
• Evaluation board for the RN-171 module
• Supports chip antenna (RN-174-C), PCB trace
antenna (RN-174-P), wire antenna (RN-174-W),
and U.FL connector for an external antenna
(RN-174-U)
• Ultra-low power: 4-uA sleep, 30-mA Rx, 180-mA
Tx at 10 dBm
• Configurable transmit power: 0 to +12 dBm
• RS-232 and TTL UART hardware interfaces
• Up to 1 Mbps data rate over UART
• Through-hole board simplifies system integration
• Powered by 3.3 to 16-V DC (input voltage can go
down to 2 V DC when using boost regulator)
• Jumpers for setting ad hoc mode and enabling the
battery boost circuit
• 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 TCP/IP networking stack
• Wi-Fi Alliance certified for WPA2-PSK
• FCC / CE/ ICS certified and RoHS compliant
Applications
• Wireless serial connections
• Remote sensors
• Telemetry
• Security
• Industrial sensors and controls
• Home automation
!
Description
The RN-174 evaluation board is a field-ready, Wi-Fi Alliance
certified, 802.11 b/g prototyping platform for the RN-171
module. The board has the flexibility to connect directly to
embedded processors via a standard RS-232 interface or
through the TTL UART interface. The RN-174 contains a
battery boost circuit, which makes it possible to power the
board using two AA batteries (the input voltage can go down to
down to 2.0 V DC when using the battery boost circuit). The
battery boost circuit makes the RN-174 perfect for batterypowered applications such as sensors, data acquisition
systems, controllers, etc. The status LEDs and jumpers enable
rapid prototyping and integration into existing systems.
The RN-174 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, DHCP,
DNS, and HTML client protocols. The RN-171 is the smallest,
lowest power 802.11 b/g module available. The module
supports ad hoc and infrastructure networking modes.
The analog sensor interface provides direct connections to send
temperature, acceleration, and other analog data without
requiring an external microprocessor. The RN-171 module is
programmed and controlled 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 send data to a remote host and
go back to a low-power sleep state once the data transmission
completes.
!
www.rovingnetworks.com Version 1.3r 4/9/2012 2
RN-174-DS
OVERVIEW
• 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-128, WPA-PSK (TKIP), and WPA2-PSK (AES)
• Built-in networking applications: DHCP, DNS, ARP, ICMP UDP, Telnet, FTP, and HTML client
• 802.11 b/g power save and roaming functions
• Supports WPS push-button mode for easy network configuration
The evaluation board’s size and weight are:
• Size—2” x 1.1” x 0.45”
• Weight—0.35 oz
Tables 1 through 5 provide detailed specifications for the evaluation board.
Table 1. Environmental Conditions
Parameter
Value
Temperature range (operating)
-45
o
C ~ 85
o
C
Temperature range (storage)
-45o C ~ 85
o
C
Relative humidity (operating)
≤90%
Relative humidity (storage)
≤90%
Table 2. Electrical Characteristics
Supply Voltage, Note (1)
Min
Typ.
Max.
Unit
Power connector (J7)
2.0 (1)
3.3
16 (1)
V
UART interface (J8)
3.0
3.3
3.6
V
RS-232 interface (J3)
5.0 16
V
Power consumption
Sleep 4 uA
Standby (doze)
-
15 - mA
Connected (idle, RX)
40 mA
Connected (TX)
180 at 10 dBm
mA
Notes:
1. Supply voltage range varies depending upon the header used. See “Design Concerns” on page 6 for more details.
!
www.rovingnetworks.com Version 1.3r 4/9/2012 3
RN-174-DS
Table 3. Analog Sensor Inputs
Parameter
Value
Sensor 0, 1, 2, and 3 wake-up detection threshold
500 mV
AD sensor 0 - 7 measurement range
0 - 400 mV
Precision
14 bits = 12 uV
Accuracy
5% uncalibrated, .01% calibrated
Minimum conversion time
35 uS (5 kHz over Wi-Fi )
Sensor power (pin 33) output resistance 3.3 V
10 ohms, maximim current = 50 mA
Table 4. Radio Characteristics
Parameter
Specifications
Frequency
2,402 ~ 2,480 MHz
Modulation
802.11b compatibility: DSSS (CCK-11, CCK-5.5, DQPSK-2, and DBPSK-1)
802.11g: OFDM (default)
Channel intervals
5 MHz
Channels
1 - 14
Transmission rate (over the air)
1 – 11 Mbps for 802.11b / 6 – 54 Mbps for 802.11g
Receive sensitivity
-83 dBm typical
Output level (Class1)
0 to +12 dBm (software configurable)
Table 5. Transmit Power
Output Power
802.11 b (2 Mbps)
Current in mA Note (1)
802.11 g (24 Mbps)
Current in mA Note (1)
0
120
135
2
130
150 4 170
190
6
175
200
8
180
210
10
185
225
12
190
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.
Loading...