IoT WiFi module > UART/SPI module > RAK425

Low Power WiFi Module RAK425

RAK425 ultra-low power consumption, UART turn WiFi bidirectional transmission, dual socket support bidirectional data transparent transmission, RAK425 is a transparent transmission module that allows customers to rapidly develop support auxiliary AT commands.

  • ☼ Small package size: 20.5mm×15.6mm
  • ☼ Low Power: Standby low to 3mA in the network, the depth of the lowest dormant 1.5uA
  • ☼ 0 development effort: integrated hardware design and mobile App developers to complete the network configuration of two-way data communication
  • ☼ High speed UART: baud rate up to 921600bps, the actual throughput of up to 70KB/S
  • ☼ EasyConfig: patent protection, one-key to network connection
  • ☼ Stable transmission: a single 10MBytes packet is not lost bytes

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Shenzhen Headquarters

  • Room 1007, Hangsheng Technology Building, South Four Road, Science and Technology Park, Nanshan District, Shenzhen
  • TEL: 0755-86108311
  • Fax: 0755-86152201

Shanghai R&D Center

  • B205 Lvliang Technology Pioneer Park, 2588 Hongmei South Road, Minhang District, Shanghai
  • TEL: 021-61553990
  • Fax: 021-54721038

Beijing Office

  • Tencent Zhongchang Zone, Huilongguan, Changping District, Beijing
Introduction Specifications Application Specifications


RAK425 module is an ultra-low power WIFI module that fully supports IEEE 802.11b/g/n wireless standards, with a small package and easy-to-use features. The RAK425 is a complete serial pass-through module integrated with TCP / IP protocol stack and drivers, easy to use by simply using the PC, WEB Browser, APPs tool to work individually or in bulk for parameters configuration, and then module connects the serial ports and network for normal usage.

The RAK425 module is characterized by stable performance, low power consumption and flexibility to meet the various needs of customers. It can also provide test reports, allowing customers to get started quickly, shorten the development cycle.

The RAK425 module also provides various types of customized services, such as user webpages, production and configuration tools, mobile phone APPs, etc.


  • ☼ Support IEEE 802.11b/g/n wireless standards
  • ☼ Integrated TCP / IP protocol stack
  • ☼ Support OPEN, WEP, WPA/WPA2-PSK Encryptions
  • ☼ Support SoftAP, Station modes
  • ☼ Support TCP, UDP protocols
  • ☼ Support AT commands and transparent transmission mode
  • ☼ Support UART communication with a data flow control, maximum rate of 921600bps
  • ☼ Support multiple configuration tools for one-step configuration
  • ☼ Support wireless upgrade firmware
  • ☼ On-board ceramic antenna or U.FL antenna connector
  • ☼ Operating voltage: 3.3V
  • ☼ Support 4 kinds of power operating mode, with the lowest power consumption of 1.1uA
  • ☼ Small package size: 20.5mm×15.5mm(curved needle height: 6.4mm,vertical needle height: 8.7mm)
  • ☼ FCC, RoHS and CE compliant


  • ☼ Portable products
  • ☼ Home appliances and electricalappliances
  • ☼ Industrial sensors
  • ☼ Sales terminals
  • ☼ Buildings automation
  • ☼ Logistics and freight management
  • ☼ Home security and automation
  • ☼ Medical applications, such as patient monitoring, medical diagnostics
  • ☼ Metering (stop timing, measuring instruments, meters, etc.)


Hardware Information
WIFI Chip Qualcomm AR6K
MCU Nuvoton NANO
RF Parameter
Wireless standard 802.11 b/g/n
Frequency Range 2.412GHz-2.484GHz
Transmitting Power 802.11b: +17 dBm (Max.)
802.11g: +17 dBm (Max.)
802.11n: +17 dBm (Max.)
Receiving Sensitivity 802.11b: -97dBm
802.11g: -91dBm
802.11n: -89dBm
Transmission Speed 802.11b:11 Mbps
802.11g:54 Mbps
802.11n:54 Mbps
Antenna On-board ceramic antenna、External Antenna IPEX
Transmission Distance External maximum 120m (open sight, 2dBI antenna)
Maximum 80 meters onboard antenna (open line of sight)
WIFI Parameter
Wireless network type STA / AP / Ad-hoc Mode
Security Mechanism WEP / WPA-PSK / WPA2-PSK / WAPI
Encryption Type WEP64 / WEP128 / TKIP / AES
Networking Protocol TCP / UDP / ARP / ICMP / DHCP / DNS / HTTP
Maximum number of TCP connections 2
AP maximum number of connections 1
Speed Networking Around 220ms
Communication Interface UART
Work Pattern Transparent transmission,UART
Interface parameters Default115200, can be configured.
Interface Standard UART ,3.3V
Electrical Parameters
Working Voltage 3.3V (3.14~3.46)
Working Temperature -40℃~ 85℃(Technical Grade)
Storage Temperature -65℃~ 135℃,5 ~ 95% RH(No Condensation)
Size 20.5mm×15.6mm
Configuration Tools Wireless scan configuration, WEB configuration, AT command configuration, APP a key configuration, WPS configuration
Customer Application Provide Android, iOS and SDK on the PC development kit
Provide customer application platform SDK driver source
Hardware reference design
Defects Liability Period 1 Years


Model Web AP
STA Mode
OTA Update Number
of Socket
Network Info Saved
Ultra Low
Power Mode
Local Discovery
RAK475 Yes 3 Yes Yes 2 Yes Yes Yes Yes Yes No No Yes Yes Yes 5 No UDP/mDNS
RAK477 No 3 Yes Yes 2 No No Yes Yes Yes No No No Yes No 5 No UDP
RAK415 Yes 1 No Yes 2 No No Yes Yes Yes No No No No Yes 1 Yes UDP
RAK425 Yes 1 No Yes 2 No No Yes Yes Yes No No No No Yes 1 Yes UDP