RAK RAK477 User manual

Copyright © Shenzhen Rakwireless Technology Co., Ltd
ETDX1602241830
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RAK477 Instruction Manual
RAK477 UART WiFi Module
Instruction Manual V1.2
Shenzhen Rakwireless Technology Co., Ltd.
www.rakwireless.com
[e-mail]
© RAK copyright. All rights reserved.
Companies and product names referred in
the instruction belong to trademarks of
their respective owners.
Any part of this document may not be
reproduced, and may not be stored in any
retrieval system, or delivered without RAK's
written permission.
The document will be updated without
prior notice.

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RAK477 Instruction Manual
Content
1. Rapid usage.................................................................................................................................... 4
1.1 Introduction to the development board..............................................................................4
1.2 The method for the module to reset to Factory Defaults................................................. 5
1.3 Inspection prior to powering on.........................................................................................6
1.4 The status after powering on.............................................................................................. 6
1.5 Transparent transmission data test..................................................................................... 7
2. Function features............................................................................................................................9
2.1 Overview..............................................................................................................................9
2.2 Application fields................................................................................................................ 9
2.3 Product features.................................................................................................................10
3. Instruction encyclopedia............................................................................................................. 12
3.1 Network configuration method........................................................................................12
3.2 AP configuration............................................................................................................... 13
3.3 EasyConfig Configuration................................................................................................15
3.4 Upgrading.......................................................................................................................... 17
3.5 Usage of scanning configuration tools............................................................................ 19
4. Aided AT commands................................................................................................................... 25
4.1 Basic flow chart................................................................................................................ 25
4.2 AT command set................................................................................................................26
4.3 Command format.............................................................................................................. 27
4.4 Enter into aided commands..............................................................................................28
4.5 Module management instruction..................................................................................... 29
4.5.1 Open ASCII display.............................................................................................. 29
4.5.2 Query the module’s MAC address.......................................................................30
4.5.3 Enter into the transparent transmission mode.....................................................31
4.5.4 Query the software version.................................................................................. 32
4.5.5 Reset to restart the module................................................................................... 33
4.5.6 Reset to Factory Defaults..................................................................................... 34
4.6 Parameter configuration instruction................................................................................ 35
4.6.1 Write user configuration.......................................................................................35
4.6.2 Read the user configuration............................................................................ 36
4.6.3 Reproduce the user configuration........................................................................37
4.6.4 Read Factory Defaults.......................................................................................... 38
4.6.5 Read Factory Defaults.......................................................................................... 39
4.7 AP STA operating instruction.......................................................................................... 40
4.7.1 Query the connection status of STA.................................................................... 40
4.7.2 Query the connection status of AP...................................................................... 41
4.7.3 The wireless signal intensity of STA...................................................................42
4.7.4 Scan the wireless network.................................................................................... 43
4.7.5 Get the wireless network...................................................................................... 45
4.7.6 EasyConfig networking........................................................................................ 47
4.7.7 Query IP information............................................................................................ 47
4.7.8 Query the connected network information..........................................................49
4.8 Instruction for receiving and sending the data................................................................50
4.8.1 Send data................................................................................................................50
4.8.2 Receive data.......................................................................................................... 51

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4.9 Information storage commands for the user networking list.........................................53
4.9.1 Read the number of current list............................................................................53
4.9.2 Read the networking information in the indicated lists..................................... 54
4.9.3 Write the networking information to the indicated lists.....................................55
4.9.4 Delete the networking information in the indicated lists................................... 56
4.10 Upgrading of serial port firm ware................................................................................57
4.10.1 Enter into the upgrading mode.......................................................................... 57
5. Appendix-configuration parameter encyclopedia.....................................................................59
6. Version..........................................................................................................................................64

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RAK477 Instruction Manual
1. Rapid usage
1.1 Introduction to the development board
RAK477 serial port transparent transmission module focuses on transparent
transmission supported by AT Command; it has the advantages of simple operation
and rich functions and can meet the requirements of various kinds of customers.
First, let's see the usage of RAK477 evaluation suits.
Table 1-1: Development board source
Table 1-2: LED Definition
Function
Name
Description
Module
U3
RAK477 transparent transmission WIFI module
External Interface
Micro USB
Input power supplied DC5V, communication interface
of USB to serial port
Key
Reset
Module reset key
WPS/MODE
WPS function is to instantly configured to the network
(match with the router’s WPS)
Default
1. Press the “greater than 3 seconds” module to
recover to the Factory Defaults parameters
2. Press the “less than 1 second”, instantly configure
the easyconfig mode
Pin
P2
UART and 232 interface
P6
Reset, Link and other pins
Power Consumption
pin
J1
Power consumption measurement interface
LED Indicators
POWER
Power Lamp
STATUS
Start Running Indicator Lamp
LINK
Network Indicator Lamp
Status
Link
Status
Function
Instant configuration
Flash interval of 200ms
Normally on
Upgrading of hard wares
Flash interval of 50ms
STA Mode
Unconnected
Normally off
Normally on

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RAK477 Instruction Manual
Note:
“Status” light is a start light, which is in the normally on status after the
module starts regularly.
After pressing the instant configuration key for less than 1 second, “Link” light
flashes until the configuration is successful or of timeout.
After pressing the recovering Factory Defaults key for more than 3 seconds,
“Link” and “Status” are on and off at the same time, and automatically reset
after 3 seconds.
Coexistence of AP and SAT mode, the indicator lamps indicate jointly
1.2 The method for the module to reset to Factory Defaults
There is a “Default” key on the development board, which is used to reset to
Factory Defaults for the module when the configuration is made by mistakes or the
current configuration parameters are forgotten:
Press the “Default” key for over 3 seconds, the indicator lamp “Link” and
“Status” are on and off at the same time, at this time, loose the “Default” key for
3 seconds, the module will reset to the Factory Defaults mode (establish AP by
default, and the customer can modify the defaults parameters).
Connecting to the network
Flash interval of 1 second
Getting IP
Flash interval of 2 seconds
The network is connected
Normally on
Socket event
Flash for three times
AP mode
AP is not established
Normally off
Normally on
AP is established, and not
connected
Periodically on and off in 1
second
STA is connected
Normally on
Factory
Defaults
Mode
Recovering Factory Defaults
takes effect
Periodically on and off in
500ms
Periodically on
and off in 500ms

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1.3 Inspection prior to powering on
The evaluation suits mainly include: antenna of Micro USB line, development board,
IPEX connector interface. If the module is external antenna module, please plug in
the antenna. Connect the module’s serial port and computer’s serial port (the USB
to serial port of the computer).
1.4 The status after powering on
Normal phenomenon
After the module is powering on, the power indicator lamp (power lamp) lights on,
next, the “Status” light is on (the “Status” pins output the low level), it shows
that the module starts regularly.
If the “status” light is not on after powering on, please try to press the “Reset”
key. If the light is always off, please contact the After-Sale Service.
Under the Factory Defaults mode of the module, an open AP network will be
established after powering on, with the name of RAK477_AP_XXXXXX (XXXXXX is the
rear six digits of the module's MAC address), IP address of 192.168.7.1, default
opening of DHCPSever (the Factory Defaults can be modified). After the “Status”
light is on, open the computer's wireless network, RAK477_AP_XXXXXX will be found
in the wireless list, as shown below:
Figure 1-1: Factory Defaults AP scanning
1．Double click to join the network (at this time, “Link” will be normally on),

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wait for well distributed IP address.
2．Through the mobile phone APP set the module serial port and socket
parameters.
1.5 Transparent transmission data test
1. Open the serial port tools, select the COM port connected to the module. The
default baud rate is 115200, data bit is 8, stop bit is 1, with no parity, no flow
control. Open network debugging tools (TCP/UDP tool), establish TCP client to
connect the IP and port of the other party (the default IP of the module is
192.168.7.1, the server port is 25000).
Figure 1-5: Establish TCP Client
2. After TCP is connected, the data can be sent to each other. At this time, the serial
port of the module is changed into the virtual serial port of the network, and the
serial port data and network data is interconnected.

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Figure 1-6: Factory Defaults mode transparent transmission test

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RAK477 Instruction Manual
2. Function features
2.1 Overview
RAK477 module is a Wi-Fi module that fully compliant with IEEE 802.11b/g/n
wireless standards, It combines an ARM-CM3 MCU, WLAN MAC, a 1T1R capable
WLAN baseband, and RF in the module. It have onboard antenna, and external
antenna interface, RF output PIN also exist in the board. RAK477 internally
integrated TCP / IP protocol stack, supporting numerous protocols such as ARP, IP,
ICMP, TCP, UDP, DHCP CLIENT, DHCP SERVER, DNS and other etc. It supports AP
mode, STA mode, AP+STA mode. It support rich AT command for all kinds of
application, Users can easily and quickly use it to wifi networking and data
transmission. It also support transparent transmission, easy to use by simply using
the PC, APPs tool to work individually or in bulk for parameters configuration, and
then module connects the serial ports and network for normal usage. The baud rate
of module serial port is up to 921600bps, which can fully meet the low-rate
applications.
In network part, RAK477 supports storing network parameters in the module, and
reduce time connect to network. The module supports wireless network parameters
configuration, supports wireless firmware upgrade. It also supports EasyConfig.
It also provides a bunch of configurable GPIOs which are configured as SPI ,UART,
I2C, for different applications and control usage. RAK477 integrates internal 512K
SRAM and 1MB flash for complete WIFI protocol functions.
2.2 Application fields
Portable products
Household appliance
Industrial sensor
POS terminal
Building automation
Logistics and freight management

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Household security and automation
Medical field, for example, patients monitoring, medical diagnosis
Measurement (parking meter, metering instrument, ammeter and the like)
2.3 Product features
Application
Support at commands and transparent transmission mode
Support for multiple baud rate
Support wireless configuration and OTA upgrade firmware
Support the UART interface, OTW upgrade function
Support for fast networking, easyconfig, function
Support AP, STA, AP+STA Mode
Support proactively identifying devices in LAN
Standards Supported
802.11b/g/n compatible WLAN
802.11e QoS Enhancement (WMM)
802.11i (WPA, WPA2). Open, shared key, and pair-wise key authentication
services
Light Weight TCP/IP protocol
WLAN MAC Features
CMOS MAC, Baseband PHY, and RF in a single chip for 802.11b/g/n
compatible WLAN
Complete 802.11n solution for 2.4GHz band
72.2Mbps receive PHY rate and 72.2Mbps transmit PHY rate using 20MHz
bandwidth
150Mbps receive PHY rate and 150Mbps transmit PHY rate using 40MHz
bandwidth
Backward compatible with 802.11b/g devices while operating in 802.11n
mode
Compatible with 802.11n specification
Frame aggregation for increased MAC efficiency (A-MSDU, A-MPDU)

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Low latency immediate High-Throughput Block Acknowledgement (HT-BA)
Long NAV for media reservation with CF-End for NAV release
PHY-level spoofing to enhance legacy compatibility
Power saving mechanism
WLAN PHY Feature
802.11n OFDM
One Transmit and one Receive path (1T1R)
20MHz and 40MHz bandwidth transmission
Short Guard Interval (400ns)
DSSS with DBPSK and DQPSK, CCK modulation with long and short
preamble
OFDM with BPSK, QPSK, 16QAM, and 640QAM modulation. Convolutional
Coding Rate: 1/2, 2/3,3/4, and 5/6
Maximum data rate 54Mbps in 802.11g and 150Mbps in 802.11n
Fast receiver Automatic Gain Control (AGC)
Peripheral Interfaces
Maximum 1 SPI supported with baud rate up to 10.4MHz.
Support 4 External Timer Trigger Event (ETE function) with configurable
period in low power mode
Maximum 17 GPIO pins
2 high speed UART interface with baud rate up to 4MHz

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3. Instruction encyclopedia
3.1 Network configuration method
The transparent transmission module aims at data communication in the end. WIFI
communication is carried out under the preconditions of parameter configuration,
and the network configuration (network name, PIN and IP address) and
communication protocol socket setting (TCP, UDP) is rather important. The module
defines the following two concepts for the parameters.
At first, the module defines two parts, namely, delivery parameters and user
parameters.
Delivery parameters: the module maintains the parameters of the initial status
when it is not regularly used (generally acts as AP access point). At this time, the
module has independent network name, fixed IP address, etc. The delivery mode
ensures the recovery of the module, so as to avoid the problems caused by
user’s configuration mistakes. (Delivery parameters can be modified by
customers)
User parameters: when the module was regularly configured, the module will
enable a new configuration to be user parameters as will be automatically
loaded when the module resets. (Can write once)
In order to transfer from the delivery mode to the user mode easily, RAK477
transparent transmission module provides two kinds of flexible configuration
methods to connect to the user’s router:
AP configuration
EasyConfig instant configuration
The module supports coexistence of AP and STA mode, i.e. users can not only
connect the module to the router (Internet), but also access and look up the module
and the like in the local net via the existing AP network, so as to be greatly
convenient for users and enhance the user's experiences.

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3.2 AP configuration
When the module is delivered, the default configuration is AP configuration with
“status” light always on and “link” light slowly flashing.
The mobile phone is connected to the hot point of RAK477_AP_XXXXXX with “link”
light always on.
Use the mobile phone to open RAK47XConfigure software, and select the module
type of RAK477.
Enter into the Config option and select APConfig configuration:

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Confirm that the mobile phone has been connected to the module hot spot, and
then click NEXT:
Select the router to connect, input the password, click Connect, and the module will
automatically save after receiving SSID and password.

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Connect mobile phone to the router saved on the module, select LocalScan option,
and scan the module:
3.3 EasyConfig Configuration
First, the mobile phone is connected to the router which is to be connected by the
module.
RAK477 Use the mobile phone to open RAK47XConfigure software, and select the
module type of RAK477.

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Enter into the Config option, and select SimpleConfig configuration:
SSID is automatically filled in, input PSK
Press the development pad’s “default” key, the “link” light begins to slowly
flash
Click Connect to start configuration.

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Return to the module’s “mac” address after successful configuration:
3.4 Upgrading
The module supports upgrading under the AP, STA and AP+STA mode.
The following mainly introduces the upgrading of the module under STA mode.

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When upgrading the firm wares, the prior configuration information can be retained,
thus being able to continue to connect the afore configured router after upgrading
without configuration again.
First, confirm the mobile phone and the module is connected to the same router.
Open the mobile phone APP; select the module type of RAK477.
Select OTA option, click “CetInfo” to obtain the module's “mac” and “ip”
address and other information;
Click the module information area, and enter into the upgrading interface.
The module’s upgrading firm ware is saved under the RAK47X\RAK477 folder of
the mobile phone, with file name format referring to
“RAK477_OTA_V1.0.0.6-2.6.2.bin”, “Cur version” is the current firm ware version
of the module, “New version” is the mobile phone’s firm ware to be upgraded,
click “Start” to begin to upgrade.

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After the completion of firm wares’ upgrading, wait for 30 seconds (the module
loads the firm ware and connects the router again)
3.5 Usage of scanning configuration tools
Mobile phone APP——RAK47XScanConfig
When the module works under AP mode, using the tool can scan the module after
the mobile adds the module AP;
When the module works under STA mode and is successfully connected to the router,
connect the mobile phone to the same router, and then the tool can scan the

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module;
When the module works under AP+STA mode, the mobile phone is added to module
AP or to the router connected to the module, the tool can scan the module.
Next, we will mainly introduce the usage of the module under STA mode.
1. Drop down the screen and scan the RAK47X module in the current network
connected to the mobile, as shown below:
2. Click the module and input user's name and password for authentication, the
default values are both “admin”.
3. Configure the module
Caution: each configuration shall click “save” button to save the modified
configuration parameters, and the modified parameters will not be effective until the
module restarts.