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RAK473 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. RAK473 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, Station mode. It also support rich AT command for all kinds of application. Users can easily and quickly use it to wifi networking and data transmission. The baud rate of module serial port is up to 921600bps, which can fully meet the low-rate applications.

In network part, RAK473 supports storing network parameters in the module, and reduce time connect to network. The module has built-in WEB server, supporting wireless network parameters configuration, supporting wireless firmware upgrade. It also supports WPS and EasyConfig. In application part, HTTP, MQTT, MDNS and SSL also be supported.

It also provides a bunch of configurable GPIOs which are configured as SPI ,UART, I2C, I2S, PWM, for different applications and control usage. RAK473 integrates internal 2M SRAM ,and 512KB DRAM and 2MB flash for complete WIFI protocol functions. 



  • UART serial AT Command set operation
  • Support for multiple baud rate
  • Support wireless configuration and OTA upgrade firmware
  • Support the UART interface, OTW(over the wire) upgrade function
  • Support for fast networking, easyconfig, WPS function
  • Support MDNS, MQTT, HTTP, TLS applications
  • Support TLS1.2
  • Support 160KByte NVM Flash

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
  • WIFI WPS support
  • 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)
  • 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 2 PCM with 8/16KHz sample rate
  • Maximum 2 SPI supported with baud rate up to 41.5MHz
  • Support 4 PWM with configurable duration and duty cycle from 0 ~ 100%
  • Support 4 External Timer Trigger Event (ETE function) with configurable period in low power mode
  • Maximum 20 GPIO pins
  • A high speed UART interface with baud rate up to 4MHz

Operation Flowchart

RAK473 UART command operation feature completes a few basic steps of WIFI communication, including network scanning, joining network and obtaining an IP address, and eventually establishing Socket communication. RAK473 provides a variety of convenient operation to implement networking, so that customers can easily complete the network configuration, and concentrate on the management of socket and their own data protocols.

To realize automatic networking management, customers can take advantage of WEB, WPS and EasyConfig configuration module. The module will automatically store paramenters after a successful configuration, and these automatic networking commands can be used any time, letting the module automatically complete networking operation, and returning the results.

AT Command Syntax

 Host to module:
     at+<command>=<para 1>,<para 2>,................<para n>\r\n
 All at commands, including parameters, are ASICII code, such as:
1.After each command is executed, the module will send a return value, as  
the following format
2.If the command is successful, the return value
     OK\r\n or OK<para 1><para 2>.......................<para n>\r\n   
Note: In addition to OK, the other parameters are in hexadecimal, for example,
     OK\r\n      HEX=4F 4B 0D 0A----------------------------No parameters
     OK@\r\n     HEX=4F 4B 64 0D 0A--------------------------parameter =0x64
3.If the command fails, the return value
   ERROR is the ASCII code,<code>is hexadecimal, for example,
   ERROR ?\r\n    HEX=45 52 52 4F 52 FE 0D 0A----------------<code>=oxFE

AT command syntax description: AT command begins with “at +” (all lowercase) and end with “\ r \ n”, the maximum command length is 80 bytes, all other commands beginning with any other format are wrong.

Note:The AT command syntax above does not apply to receiving and sending data commands at + recv_data and at + send_data, for detailed instructions, please refer to at + recv_data, at + send_data

Error Code:

Code Description
-1 Parameter input error (parameter is not recognized / missing parameter / command too long / other illegal parameter)
-10 Module is busy (wait until module processing is completed)
-12 Unknown error (internal storage, system, etc.)
-14 The system is upgrading, please operate later.
Other See specific command for details

AT Command List

AT command Description
Module management command
at+ascii = <mode>\r\n Opening ASCII display
at+mac\r\n Query of module MAC address
at+version\r\n Query of software version
at+pwrmode = <mode>\r\n Setting power consumption mode of module
at+reset\r\n Reset module
at+set_hostname = <name>\r\n Setting module hostname
at+get_hostname\r\n Acquiring module hostname
at+set_funcbitmap = <bitmap>\r\n Setting special function bit
at+get_funcbitmap\r\n Reading special function bit
at+data_mode\r\n Setting data mode command
Network command
at+scan = <channel>, <ssid>\r\n Scanning wireless network
at+get_scan = <scan_num>\r\n Reading the specified number of scanning results
at+psk = <passphrase>\r\n Setting passwords for joining / creating network
at+channel = <channel>\r\n Setting informaiton channel for joining / creating network
at+ap = <ssid>\r\n Creating the name of AP Network
at+connect = <ssid>\r\n Connecting the specified network
at+ipstatic = <ip>, <mask>, <gateway>, <dns server1>, <dns server2>\r\n The IP address information of static setting module
at+ipdhcp=<mode>\r\n Opening DHCP Sever under dynamic allocation of IP or AP
at+easy_config\r\n Module command of one-key-networking
at+wps\r\n Net-connecting through WPS mode
at+con_status\r\n Query of network connection status
at+ipconfig\r\n Query of IP address information
at+rssi\r\n Query of network signal strength
at+dns = <domain>\r\n DNS name resolution
at+ping = <host>, <count>, <size>\r\n The Host under the Ping network
at+apconfig = <hidden>, <contry code>\r\n Advanced settings of AP Network
at+disc\r\n Disconnectting the currently connected network
Mqtt command
at+mqtt_init = clientId, alive\r\n Initialization of mqtt parameter
at+mqtt_auth = username, password\r\n Setting authentication parameters
at+mqtt_con = svr_ip, svr_port, <SSL_enable>\r\n Connecting the Server
at+mqtt_discon=fd\r\n Disconnecting Mqtt connection
at+mqtt_con_status\r\n Query of mqtt connection status
at+ mqtt_sub=sub_topic\r\n Subscribing themes
at+mqtt_unsub=sub_topic\r\n Unsubscribing themes
at+mqtt_pub = pub_topic, retain\r\n Setting push topics
socket command
at+ltcp = <local_port>\r\n Creating TCP Server
at+tcp = <dest_ip>, <dest_port>, <module_port>, <ssl_enable>\r\n Establishing TCP Client
at+ludp=<local port>\r\n Creating UDP Server
at+udp=<dest_ip>,<dest_port>,<local_port>\r\n Establishing UDP Client
at+multicast=<dest_ip>,<dest_port>,<local_port>\r\n Creating UDP multicast communication
at+set_cert = <cert_type>, <file_len>, <data_stream>\r\n Setting ssl security certificate
at+cls = <flag>\r\n Closing opened socket handle
at+socket_status = <flag>\r\n Query of socket status
at+read = <flag>, <data_length>\r\n Reading data through way of query
at+send_data = <flag>, <dest_port>, <dest_ip>, <data_length>, <data_stream>\r\n Sending data
at+recv_data = <flag> ,<dest_port>, <dest_ip> ,<data_length> ,<data_stream>\r\n Receiving data
at+http_get / https_get = <ip / domain>: <port> / <url>\r\n HTTP / HTTPS GET command
at+http_post/https_post=<ip/domain>:<port>/<url>,<data>\r\n HTTP / HTTPS POST command
Parameter perservation command
at+storeconfig\r\n Save the network parameter / tape parameter
at+get_storeconfig\r\n Acquiring the saved network parameter
at+web_config = web_param\r\n Modifying the network parameter of the built-in WEB server
at+get_webconfig\r\n Acquiring the saved network parameter of built-in WEB
at+uartconfig = <baud rate>, <data bits>, <stop bits>, <parity>, <flow ctrol>\r\n Modifying the UART parameter of module, current effect
at+store_uartconfig = <baud rate>, <data bits>, <stop bits>, <parity>, <flow ctrol>\r\n Modifying the UART parameter of module, reset effect
at+auto_connect\r\n Starting automatical net-connecting
at+start_web\r\n Open WEB service, configuring module
Capture command
at+set_filter=<s_mac>,<d_mac>,<rssi>\r\n Setting packet filtering
at+start_promisc=<channel>\r\n Start caught
at+stop_promisc\r\n Stop caught
Read and write NVM data
at+nvm_write=<addr>,<len>,<data>\r\n Write data to NVM
at+nvm_read=<addr>,<len>\r\n Read the NVM data
Firmware upgrade
at+upgrade\r\n Into the firmware upgrade mode

== Pleace see the programming manual for the detailed meaning of the AT command. ==

Pin definition

Pin Name Type Description
1,3,21,33 GND Ground All ground pins are connected to ground pad or the copper.
22 VCC3.3V Power 3.3V power supply.
2 RF_OUT O 2.4GHz RF output.
4 VDDIO Power 3.3V for Digital IO or digital blocks.
11 RESET I Module reset pin, Active low.
17 LINK O Work status indicator pin of module, output low effective.
23 TXD O Serial data communication interface send.
26 RXD I Serial flow control pin, ready to receive, Active low.
24 RTS O Serial flow control pin, The default output low. Active low, ready to receive data / request the other party to send data.
25 CTS I Serial flow control pin, Input pull. Active low, ready to send data/request each other to send data. High level cannot send data, low level can send data.
20 NC/VCC I Use 473/475 module,this pin can Suspended;If use the 476/477 module,this pin must connect VCC3.3V
Others NC NC Remain disconnected when no use.

Reference design

EVB Use Guidence

Test Open AP

  Welcome to RAK473		//Power on information
at+ascii=1			//Set ascii show 
at+psk=123456789		//Set AP Password
at+ap=RAK473_AP			//Establish AP
at+ipstatic=,,,,0 //Set static IP address
at+ipdhcp=1				//Open dhcp server
at+ltcp=25000				//Set tcp server
  at+recv_data=connect			//Receive STA connection event
  at+recv_data=128,0,47466,	//Receive client TCP connection event
  at+recv_data=0,47466,,12,hello rak473	//Receive data
  at+recv_data=129,0,47466,	//Receive client TCP disconnect event
  at+recv_data=disconnect		//Receive STA disconnect event

Test Connecting Router

  Welcome to RAK473				//Power on information
at+ascii=1					//Set ascii show 
at+psk=123456789				//Set routing password
at+connect=rakwireless				//Connection Route
at+ipdhcp=0					//Dynamic acquisition of IP
at+ltcp=25000					//Create a server TCP
  at+recv_data=128,0,59231,	//Receive client TCP connection event
  at+recv_data=0,59231,,12,hello rak473	//Receive data
  at+recv_data=129,0,59231,	//Receive client TCP disconnect event

For more detailed examples, please refer to the linkWisNode-UART

Electrical Specification

General specification

Operating Frequency 2.400-2.4835GHz
WiFi Standard 802.11b/g/n
Modulation 11b: DBPSK,DQPSK and CCK and DSSS
11n: MCSO-15 OFD
Data rates 11b:1,2,5.5 and 11Mbps
11g:6,9,12,18,24,36,48 and 54 Mbps
11n:MCSO-15,up to 150Mbps
Host Interface UART
Dimension Typical (L x W):21mm x 18mm
Operation Temperature -20℃ to +85℃
Storage Temperature -55℃ to +125℃
Operation Voltage 3.3V±0.2V

802.11b Mode

Specification IEEE802.11b
Channel CH1 to CH13
Data rate 1,2,5.5,11Mbps
1.Power Levels (calibrated) Min. Typ. Max. Unit Note
1)16dBm Target (For each antenna Port) 15 17 19 dBm
2.Frequency error -25 0 +25 kHz
3. Minimum input level sensitivity Min. Typ. Max. Unit Note
1)11Mbps(FER≤8%) --- -82 --- dBm
2)Maximum input level (FER≤8%) --- -10 --- dBm

802. 11g Mode

Specification IEEE802.11g
Channel CH1 to CH13
Data rate 6,9,12,18,24,36,48,54Mbps
1.Power Levels (calibrated) Min. Typ. Max. Unit Note
1)16dBm Target (For each antenna Port) 12 14 16 dBm
2.Constellation error(EVM)@target power Min. Typ. Max. Unit Note
1)54Mbps --- -30 -28 dB
3.Frequency error -25 0 +25 kHz
4.Minimum input level sensitivity Min. Typ. Max. Unit Note
1)54Mbps(PER≤10%) --- -78 --- dBm
5.Maximum input level (PER≤10%) --- -10 --- dBm

802. 11n HT20 Mode

Specification IEEE802.11n HT20@2.4GHz
Channel CH1 to CH13
Data rate MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15
1.Power Levels (calibrated) Min. Typ. Max. Unit Note
1)16dBm Target (For each antenna Port) 12 14 16 dBm
2.Constellation error(EVM)@target power Min. Typ. Max. Unit Note
1)MCS7 --- -30 -28 dB
3.Frequency error -25 0 +25 kHz
4.Minimum input level sensitivity Min. Typ. Max. Unit Note
1)MCS7(PER≤10%) --- -76 --- dBm
5.Maximum input level (PER≤10%) --- -10 --- dBm

802. 11n HT40 Mode

Specification IEEE802.11n HT40@2.4GHz
Channel CH1 to CH13
Data rate MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15
1.Power Levels (calibrated) Min. Typ. Max. Unit Note
1)16dBm Target (For each antenna Port) 12 14 16 dBm
2.Constellation error(EVM)@target power Min. Typ. Max. Unit Note
1)MCS7 --- -30 -28 dB
3.Frequency error -25 0 +25 kHz
4.Minimum input level sensitivity Min. Typ. Max. Unit Note
1)MCS7(PER≤10%) --- -74 --- dBm
5.Maximum input level (PER≤10%) --- -10 --- dBm

Data download


Use manual


Hardware encapsulation

Update Firmware


Order information

Product Describe Antenna MOQ(PCS) Evaluation Board
RAK473MA-XXXX UART interface module,with on-board antenna On-board 400 RAK473-EVB
RAK473MB-XXXX UART interface module,with external antenna External,U.fl/i.PEX 400
RAK473MC-XXXX UART interface module,with RF output interface RF output 400

Where to Buy

If you want to buy our products, please go to our store: RAK Store

RAK 2016/11/07 17:15

iot-product/rak473.txt · Last modified: 2018/05/17 14:24 by exxdata