Redpine Signals RS9110-N-11-22 User manual

Redpine Signals, Inc. Proprietary and Confidential
RS9110-N-11-22/24/26/28 – Self-Contained
WLAN Modules with Networking Stack
UART Evaluation Board User Guide
V
Ve er rs si io on n 1 1. .1 13 3
April ’10
Redpine Signals, Inc.
2107 N. First Street, #680
San Jose, CA 95131.
Tel: [phone]
Fax: [phone]
Email: [email protected]
Website: www.redpinesignals.com
Redpine Signals, Inc.
2107 N. First Street, #680
San Jose, CA 95131.
Tel: [phone]
Fax: [phone]
Email: [email protected]
Website: www.redpinesignals.com

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Overview
The RS9110-N-11-22/24/26/28
modules are complete IEEE 802.11bgn
and 802.11abgn based wireless device
servers that directly provide a wireless
interface to any equipment with a serial
or SPI interface for data transfer. They
integrate a MAC, baseband processor,
single/dual band RF transceiver with
power amplifier in hardware; and all
WLAN protocol and configuration
functionality, networking stack, and
HTTP server in embedded firmware to
make a fully self-contained 802.11n
WLAN solution for a variety of
applications. The RS9110-N-11-22/26
modules integrate an antenna and a
frequency reference also to further
reduce the complexity of integrating the
solution.
Applications:
Seamless Wi-Fi connectivity for
Application Processors
Industrial M2M communications
Point of Sale Terminals
Metering (Parking Meters, Utility
Meters, Power Meters, etc.)
Security Cameras and Surveillance
Equipment
Logistics and Freight Management
Warehousing
Digital Picture Frames
Several medical applications
including Patient Monitoring, Remote
Diagnostics
Device Features:
Compliant to 802.11b/g, 802.11a
and single stream draft 802.11n
Fully self-contained serial-to-
wireless functionality
Includes all the protocol and
configuration functions for WLAN
connectivity in Open, WPA/WPA2-
PSK and WPA/WPA2-Enterprise
modes of operation1
Payload data through Serial
Interface and SPI
Terminates TCP and UDP
connections, and offers transparent
serial modem functionality
Configuration through UART or
Wireless means
Bluetooth coexistence support
Integrated antenna, frequency
reference and low-frequency clock in
the RS9110-N-11-2X/26 modules
Ultra-low-power operation with
power-save modes
Ad-hoc and infrastructure modes for
maximum deployment flexibility
Single supply – 3.1 to 3.6V
operation
1Refer to the datasheets of the individual modules to know which features are
supported by which modules.

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RS9110-N-11-22 System Block Diagram
RS9110-N-11-22
RS9110 WLAN Subsystem
RS9110 RF
Transceiver
Flash
XO
Serial I/f
3.3V
Supply
RF
FE
SPI Host
I/f
Reset LED
Reset
BT Coexistence I/f
Test Port
Host Processor
UART Port
Applications
TCP/UDP
WLAN Stack
SPI/UART
Selection
GPIO
Flash
RS9110-N-11-24 System Block Diagram
RS9110-N-11-24
RF Transceiver
+
PA
Balun
Flash
T/R
Switch UART
SPI
3.3V
Peripheral I/O,
GPIO
Reference Frequency
BT Coexistence i/f
UART/SPI Select
Reset
RS9110
(TCP/UDP,
WLAN Stack)
Host Processor
Applications

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RS9110-N-11-26 System Block Diagram
RS9110-N-11-26
WLAN Subsystem
RF
Transceiver
+
PA
Balun
Flash
T/R
Switch
3.3V
Peripheral I/O,
GPIO
5G
RS9110
(TCP, UDP,
WLAN Stack)
Balun
Diplexer
2.4G
Diplexer
5GHz
2.4GHz
BT Coexistence i/f
UART/SPI Select
RESET XO LED Flash
Reset
UART
SPI
Host Processor
Applications
RS9110-N-11-28 System Block Diagram
RS9110-N-11-28
RF
Transceiver
+
PA
Balun
Flash
T/R
Switch
3.3V
Peripheral I/O,
GPIO
5G
Reference
Frequency
RS9110
(TCP, UDP,
WLAN Stack)
Balun
Diplexer
2.4G
Diplexer
5GHz
2.4GHz
Diversity
Antennas Reset BT Coexistence i/f
UART/SPI Select
UART
SPI
HostProcessor
Applications
Document Conventions
This document is for the following modules:
RS9110-N-11-22, RS9110-N-11-24, RS9110-N-11-26, RS9110-N-11-28
All references to RS9110-N-11-2X denote the above modules only.
These four modules are classified based on the hardware as depicted in the figure
below.

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RS9110-N-11-22 RS9110-N-11-24 RS9110-N-11-26 RS9110-N-11-28
With XO &
Antenna* Without XO & Antenna
Single Band
(2.4 GHz)
RS9110-N-11-2X
*Option for u.FL connector for External Antenna
Hardware
Differentiation
With XO &
Antenna* Without XO & Antenna
Dual Band
(2.4 and 5 GHz)

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Table of Contents
1: System Overview ................................................................. 8
1.1: Scope....................................................................................... 9
1.2: Limitations............................................................................... 9
2: Getting Started................................................................... 10
2.1: Connecting the RS9110-N-11-2X EVB .................................... 10
2.2: Configuring the RS9110-N-11-2X Module .............................. 11
2.2.1: Initialize the COM port of the PC................................................. 13
2.2.2: Scan............................................................................................ 15
2.2.3: Connect to a Scanned Access Point in Infrastructure Mode ........ 16
2.2.4: Connect to an IBSS Network....................................................... 17
2.2.5: Connect to a Hidden Access Point............................................... 18
2.2.6: Creating a IBSS Network ............................................................ 18
2.3: IP Address Configuration....................................................... 19
2.3.1: Manual Configuration ................................................................. 19
2.3.2: DHCP Configuration .................................................................... 20
2.4: Disconnect from Access Point ................................................ 21
2.5: TCP (UDP)/IP Evaluation....................................................... 22
2.5.1: DUT Application.......................................................................... 22
2.5.2: Peer Application ......................................................................... 23
2.5.3: Test setup and Evaluation........................................................... 23
2.5.3.1: Create Sockets...................................................................... 26
2.5.3.2: Send And Receive Data (UDP, TCP Client, LUDP) .................. 29
2.5.3.3: Send And Receive Data (TCP Server) .................................... 31
2.5.3.4: List Sockets .......................................................................... 31
2.5.3.5: Close Sockets........................................................................ 32
2.5.3.6: Power modes ........................................................................ 33
3: Firmware Upgrade.............................................................. 38
4: Components on the EVB and their Usage............................ 42
4.1: DIP Switches ......................................................................... 43
4.2: Header J4............................................................................... 43
4.3: Header J7............................................................................... 44
4.4: Header J6............................................................................... 44
4.5: Switches SW4 and SW5 ......................................................... 44
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Table of Figures
Figure 1: RS9110-N-11-2X Software Architecture Block Diagram ................ 8
Figure 2: EVB of the RS9110-N-11-22/24 Modules .................................... 10
Figure 3: EVB for RS9110-N-11-26/28 Modules......................................... 11
Figure 4: Wi-Fi Config Utility Startup Screenshot ....................................... 12
Figure 5: System Properties Window ......................................................... 13
Figure 6: COM Port Name ........................................................................... 14
Figure 7: Opened the COM Port successfully .............................................. 15
Figure 8: Wi-Fi Config Utility showing the list of Scanned Access
Points/IBSS Stations ................................................................................. 16
Figure 9: Wi-Fi Config Utility displaying the "Connected" Status................ 17
Figure 10: Connected to a IBSS Network.................................................... 18
Figure 11: Creating a IBSS Network........................................................... 19
Figure 12: IP Address Configured............................................................... 20
Figure 13: IP Address Configured through DHCP........................................ 21
Figure 14: Screenshot showing the Disconnected message........................ 22
Figure 15: Test setup for TCP (UDP)/IP Evaluation.................................... 23
Figure 16: Startup window for UDP Server Application .............................. 24
Figure 17: Startup window of UDP Client Application................................. 25
Figure 18: COM Port opened successfully by the Client application............ 25
Figure 19: Enter Socket type...................................................................... 26
Figure 20: Socket type – TCP...................................................................... 27
Figure 21: Socket type – UDP..................................................................... 27
Figure 22: Socket type – LTCP.................................................................... 28
Figure 23: Socket Type- LUDP.................................................................... 29
Figure 24: Parameters and Result for Send and Receive Data on UDP Socket
................................................................................................................... 29
Figure 25: Parameters and Result for Send and Receive Data on TCP Socket
................................................................................................................... 30
Figure 26: Server Application Starts Receiving Packets ............................. 31
Figure 27: Query Connection status and transmit/receive the data ........... 31
Figure 28: List Sockets............................................................................... 32
Figure 29: Close Sockets ............................................................................ 32
Figure 30: Sleep Timer Configuration......................................................... 33
Figure 31: Power Mode 1 - Before WLAN Connection ................................. 34
Figure 32: Power Mode 2 - Before WLAN Connection ................................. 35
Figure 33: Power Mode 1 - After WLAN Connection.................................... 36
Figure 34: Power Mode 2 - After WLAN Connection.................................... 36
Figure 35: Prompt to upgrade firmware..................................................... 39
Figure 36: Transferring "taim1"................................................................. 40
Figure 37: Firmware upgrade successful.................................................... 41
Figure 38: Components on the EVB of RS9110-N-11-22/24 Modules ......... 42
Figure 39: Components on the EVB of RS9110-N-11-26/28 Modules ......... 43
Figure 40: Pin Configuration of Header J7.................................................. 44
Figure 41: Pin Configuration of Header J6.................................................. 44
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1: System Overview
The following diagram depicts the software architecture of the RS9110-N-11-2X
module.
SLIP
UART
HOST PROCESSOR (HOST)
RS9110-N-11-2X
Host Abstraction Layer
Station Managment Entity
802.11 b/g/n MAC
TCP/IP
Wireless Control Block
SPI
WPA/WPA-2
UART DriverSPI Driver
UARTSPI
Application
Figure 1: RS9110-N-11-2X Software Architecture Block Diagram
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As shown in the figure above, the RS9110-N-11-2X module is integrated with the
Host using either UART or SPI interfaces. The transmission and reception of the
data to/from the Host depends on the interface used to connect the module as
briefed below.
UART mode:
The Host transmits/receives raw data using UART interface when RS9110-N-11-
2X is configured for UART mode. The access to the TCP/IP stack in the Wi-Fi
module through UART is provided through AT commands.
SPI mode:
Host transmits/receives raw data when RS9110-N-11-2X is configured for SPI
mode. A thin driver on the Host takes care of interacting with the Wi-Fi module
through the SPI Host interface.
1.1: Scope
The scope of this document is to guide the user in setting up the Evaluation
Board (EVB) of the RS9110-N-11-2X module to be used as a Wireless Device
Server and interact with Applications on the Host using the UART interface. The
following topics are discussed:
Procedure to use the “Wi-Fi Config Utility” GUI, which configures the
RS9110-N-11-2X module.
Procedure to evaluate the TCP/IP, UDP/IP protocols using RS9110-N-11-
2X module
Procedure to perform firmware upgrade on the RS9110-N-11-2X module.
The “Wi-Fi Config Utility” GUI and the commands explained in this document
configure the RS9110-N-11-2X module only when it is configured to use UART.
This document does not explain the design details/command formats of the
RS9110-N-11-2X module.
1.2: Limitations
My name is Rohan Joginpalli.
1. The “Wi-Fi Config Utility” explained in this document is only for the
Windows Operating System.
2. The maximum size of the raw data to be transmitted/received is 1000.
3. The maximum numbers of sockets supported in the current release of the
firmware are 8.
4. Security, DHCP and Power Save modes are not supported in IBSS.
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2: Getting Started
The following steps are to be performed to establish a Wi-Fi network and open a
network connection using the RS9110-N-11-2X module.
1. Connect power supply to the RS9110-N-11-2X EVB and switch it on.
2. Configure the RS9110-N-11-2X module using “Wi-Fi Config Utility”.
2.1: Connecting the RS9110-N-11-2X EVB
1. Connect the Male end of the supplied serial cable to the RS9110-N-11-2X
EVB’s serial port.
2. Connect the Female end of the DB9 serial cable to a PC’s serial COM port.
3. Connect the USB power cable to the RS9110-N-11-2X EVB and to a power
outlet and switch on the power to the EVB by toggling the Power Switch
(refer to the figures below).
DB9 Connector
RS9110-N-11-22
Module
LED
USB Power Supply
Power Switch
RS9110-N-11-24
Module
Figure 2: EVB of the RS9110-N-11-22/24 Modules2
2The image shown here for the EVB may be different from the one delivered to the
user because of updates in design. Please follow the instructions in this document
irrespective of the image displayed here or contact Redpine Signals in case any help
is required.

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DB9 Connector
RS9110-N-11-26
Module
LED
USB Power Supply
Power Switch
RS9110-N-11-28
Module
Figure 3: EVB for RS9110-N-11-26/28 Modules3
4. Wait till the LED glows on the RS9110-N-11-2X module. This indicates the
completion of bootloading and initialization of the baseband and RF
components.
You are now ready to configure the module using the “Wi-Fi Config Utility”.
NOTE: Please make sure that the EVB is powered on, the LED is
glowing and the serial cable is connected before proceeding with the
steps in the following sections.
2.2: Configuring the RS9110-N-11-2X Module
The Wi-Fi Config Utility is a GUI based application used to configure the RS9110-
N-11-2X module. To execute this utility, double-click on the executable RS9110-
N-11-2X.exe found in the CD in the GUI folder.
NOTE: If a Wi-Fi connection has been configured previously and if you
wish to re-configure the RS9110-N-11-2X, please restart the procedure
explained below
The following is a screenshot of the GUI.
3The image shown here for the EVB may be different from the one delivered to the
user because of updates in design. Please follow the instructions in this document
irrespective of the image displayed here.

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Figure 4: Wi-Fi Config Utility Startup Screenshot
The following are the actions that are to be performed to configure the Wi-Fi
module using the GUI above.
1. Initialize the COM port of the PC to which the RS9110-N-11-2X EVB is
connected.
2. Select the baud rate with which the COM port is configured from the drop
down menu beside the “Baud Rate” label.
NOTE: PCs and Laptops with Windows XP usually support a maximum
baud rate of 115200 bps. If a higher baud rate is selected (e.g., in a
Hyperterminal), the observation has been that the baud rate that is
actually used is 115200 bps. This will be true for the Wi-Fi Config
Utility as well. This is a limitation of the PC rather than of the RS9110-
N-11-2X EVB.
3. In case the user wants to connect to an Access Point or an IBSS Station
that is broadcasting its SSID, he/she will have to first scan for the list of
available Access Points/IBSS Stations and select the appropriate Access
Point/Station by clicking on it.
4. Alternatively, in case the user wants to connect to a hidden Access Point
whose SSID is known, he/she may enter the SSID in the GUI directly.

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5. The user can then connect to an Access Point in Infrastructure mode or to
a second Station in IBSS mode.
6. The user then needs to configure the IP address, Subnet Mask and
Gateway Address for the TCP/UDP layer inbuilt in the RS9110-N-11-2X
module.
The procedure to perform the above mentioned actions are discussed in the
following sections.
2.2.1: Initialize the COM port of the PC
The following steps are to be followed to initialize the COM port of the PC to
which the RS9110-N-11-2X module is connected.
1. In order to initialize the COM port, the correct COM port name has to be
entered in the GUI.
2. To know the COM port name, open the System Properties window by
right-clicking on "My Computer" and clicking "Properties".
Figure 5: System Properties Window
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3. In the window that opens, click on the "Hardware" tab followed by the
"Device Manager" button.
4. In the new window that opens, double-click on "Ports (COM & LPT)".
5. The COM port name is the data in the brackets as shown in the screenshot
below.
COM Port Name
Figure 6: COM Port Name
6. IBSS In the Wi-Fi Config Utility, enter the COM port name and click on
“Open”.
7. The display on the bottom-left corner shows that the COM port connection
has been initialized successfully.

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Figure 7: Opened the COM Port successfully
NOTE: In case the ABRD process fails, the GUI displays a message and
opens the COM port with the default settings. If the ABRD process
fails, it will mostly because of the connection between the PC and the
EVB not being proper. It’s recommended that the serial cable be used
directly without adapters like a USB-to-Serial adapter.
2.2.2: Scan
To scan for the available Access Points and IBSS Stations in all channels, click the
“SCAN” button. The list of scanned Access Points and IBSS Stations is displayed
on the GUI as shown below. The SSID corresponds to the SSID of the AP/IBSS
Station and mode is the security type. The RSSI value is also displayed as an
absolute value4.
4RSSI is a negative value. The RSSI displayed on the GUI is an absolute value.
Hence, the lower the value displayed, the better is the Received Signal Strength.

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Figure 8: Wi-Fi Config Utility showing the list of Scanned Access
Points/IBSS Stations
2.2.3: Connect to a Scanned Access Point in Infrastructure Mode
The following actions are to be performed to connect to an Access Point.
1. Select a specific SSID in the list by clicking on it.
2. Enter the Pre Shared Key if the Access Point is configured to be in either
WEP, WPA or WPA2 mode5.
3. Select the transmission rate and power. The modes of power are LOW (7
dBm), MEDIUM (10dBm) and HIGH (>=15dBm).
4. Click the “CONNECT” button to connect to the selected Access Point.
5. The status of the connection is displayed in the GUI as below. An error
status is displayed accordingly if the connection has failed.
5Security is not supported in IBSS mode in the present firmware release

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Figure 9: Wi-Fi Config Utility displaying the "Connected" Status
You are now connected to the WLAN network!
2.2.4: Connect to an IBSS Network
To connect to an IBSS Network the following steps are to be followed:
1. Select a specific IBSS SSID in the list by clicking on it.
2. Select the transmission rate and power. The modes of power are LOW (7
dBm), MEDIUM (10dBm) and HIGH (>=15dBm).
3. Select the Network type as IBSS.
4. Click the “CONNECT” button to connect to the selected IBSS Network.
5. The status of the connection is displayed in the GUI as below. An error
status is displayed accordingly if the connection has failed.

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Figure 10: Connected to a IBSS Network
2.2.5: Connect to a Hidden Access Point
To connect to a hidden Access Point whose SSID is known, the following steps
are to be followed:
1. Click the “SSID” button.
2. Enter the SSID in the adjacent text field.
3. If security is enabled, enter the Pre Shared Key.
4. Click the “CONNECT” button to connect to the Access Point.
2.2.6: Creating a IBSS Network
To create an IBSS Network, the following steps are to be followed:
1. Enter the network name (SSID) in the “IBSS Creation” section of the GUI.
2. Select the Channel in which you the IBSS Network is to be created.
3. Click on the CREATE button to start the network.
4. The status of creation is displayed in the GUI as shown in the figure
below.

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Figure 11: Creating a IBSS Network
NOTE: The present firmware requires that the module be powered off
and on if a connection to a different BSS is required. After powering on
the module, the same steps are to be followed as before.
2.3: IP Address Configuration
The RS9110-N-11-2X has an inbuilt TCP(UDP)/IP stack and thus provides an
option for the Host to transmit only application data, which is transmitted over
WLAN after TCP/UDP packetization.
The TCP/IP stack has to be configured with the IP Address, Subnet Mask and
Gateway Address.
The Configuration can be done in two ways:
1. Manual
2. DHCP
2.3.1: Manual Configuration
The user has to perform the steps below to configure the IP parameters.
1. Select the Manual Mode from the configuration utility.
2. Enter the IP Address in the dotted decimal format.

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3. Enter the Subnet Mask in the dotted decimal format.
4. Enter the Gateway Address in the dotted decimal format.
5. Click “OK” to complete the configuration.
Figure 12: IP Address Configured
2.3.2: DHCP Configuration
The user has to perform the steps below to obtain the IP address.
1. Select the DHCP Radio button from IP Configuration section of the
configuration utility.
2. Select the mode of reception of the data from the TCP/IP stack to the
application.
3. The IP parameters obtained from the Access Point are then displayed in
the corresponding fields.