RAKwireless Technology RAKQMR003 Wi-Fi Module User Manual
Shenzhen Rakwireless Technology Co., Ltd. Wi-Fi Module Users Manual
User Manual
RAK425 Data sheet
Content
RAK425 UART WIFI Module....................................................................................................1
Content.................................................................................................................................................2
1 Overview.......................................................................................................................................... 1
1.1 Module Overview..................................................................................................................1
1.2 Key Application.....................................................................................................................1
1.3 Device Features..................................................................................................................... 1
2 Functional Description..................................................................................................................... 3
2.1 HW Interface......................................................................................................................... 3
2.2 Wireless Driver......................................................................................................................3
2.3 TCP/IP................................................................................................................................... 3
2.4 Power Consumption.............................................................................................................. 3
3 Hardware Introduction..................................................................................................................... 4
3. 1 Module type..........................................................................................................................4
3.2 Pin Definition........................................................................................................................ 5
3.3 Design Reference.................................................................................................................. 6
3.4 RAK425 PCBMechanical Size............................................................................................. 7
3.5 Reflow Soldering Temperature Graph.................................................................................. 7
3.6 Baking Instructions............................................................................................................... 8
4 Electrical Characteristics..................................................................................................................9
4.1 Absolute Maximum............................................................................................................... 9
4.2 Recommended Operating Parameters...................................................................................9
4.3 RF Electrical Characteristics...............................................................................................10
RAK425 Data sheet
4.4 MCU Reset..........................................................................................................................11
5 Order Information...........................................................................................................................12
5.1 Products............................................................................................................................... 12
5.2 Description.......................................................................................................................... 12
5.3 Size...................................................................................................................................... 12
6 Sales and Service............................................................................................................................14
7 Revision History.............................................................................................................................15
RAK425 Data sheet
1
1 Overview
1.1 Module Overview
RAK425 module is a Wi-Fi module that fully compliant with IEEE 802.11b/g/n wireless
standards, with 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 and Ad-hoc and mode. Users can easily and quickly use it to networking
and data transmission. The baud rate of module serial port is up to 921600bps, which can fully
meet the low-rate applications.
RAK425 supports storing parameters, and by the customer commands it determines whether
to enable automatic networking to realize easy networking and reduce time for system to
networking. The module has built-in WEB server, supporting wireless network parameters
configuration, supporting wireless firmware upgrade. It also supports WPS and EasyConfig
one-key networking, significantly reducing software development effort.
RAK425 has four power management modes, among which the minimum standby power
consumption is <2uA, fully meet customer’s requirement for low power design.
1.2 Key Application
Portable products
Home appliances and electrical
appliances
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.)
1.3 Device Features
Support IEEE 802.11b/g/n wireless standards
Support UART communication with data flow control, with the maximum baud rate of
921600bps
Minimalist hardware peripheral circuit design
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Support Station, Ad-hoc and AP modes
Support DHCP SERVER / DHCPCLIENT
Support OPEN, WEP, WPA-PSK, WPA2-PSK and WPS encryption
Support TCP, UDP protocols, with maximum 8 UDP/TCP connections
Support webpage-based parameter configuration
Support WPS and EasyConfig one-key to network connection
Support parameter storage, customer orders loading after boot
Support parameters store in Deep Sleep State, with connection time as fastest as 300ms
Support wireless upgrade firmware
On-board ceramic antenna or U.FL antenna connector
Operating voltage: 3.3V
4 kinds power working modes, with minimum power consumption as 1-2uA
S mall package size: Length x width = 20.5mm × 15.5mm
(curved needle height：6.4mm，vertical needle height：8.7mm)
FCC, RoHS and CE compliant
RAK425 Data sheet
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2 Functional Description
2.1 HW Interface
Baud rate: 9600~921600bps
Interface actual throughput up to600kbps
support hardware flow control, ensuring reliability of data transmission
2.2 Wireless Driver
Compliant with IEEE 802.11b/g/n standards
Support AP 、STA 、AD-Hoc Mode
Support WEP, WPA/WPA2-PSK encryption
Fast networking, allowing module to be added to network within 1 sec
after power up
Support WPS and EasyConfig one-key to network connection
Support wireless configuration and firmware upgrade
2.3 TCP/IP
DHCP Client and Server features
DNS Client and Server functions
TCP Client, TCP Server, UDP Client, UDP Server and Multicast functions
8-way socket applications
2.4 Power Consumption
The module supports four power consumption modes:
Full speed working mode, with approx 80mA average power consumption,
peak current less than 200mA
Power-saving mode, with approx 10mA average power consumption, peak
current <200mA, DTIM = 100ms
Deep sleep mode, with approx 5mA average power consumption, peak
current <200mA, DTIM = 100ms (maximum support to 115200bps)
Standby mode, with power consumption<2uA
RAK425 Data sheet
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3 Hardware Introduction
3. 1 Module type
Figure 3-5 RAK425 Top View Figure 3-6 RAK425 Bottom View
RAK425 Data sheet
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3.2 Pin Definition
Table 3-7: Pin Definition
Pin Serial No. Name Type Description
1 GND Ground connected to ground pad or the copper
2 VCC3V3 Power 3.3V power supply
3 NC NC Remain disconnected when no use
4 RESET I，PU Module reset pin, low effective
5 NC NC Remain disconnected when no use
6 RXD O Serial data communication interface send
7 TXD I Serial flow control pin, ready to receive, low
effective
8 RTS I Serial flow control pin, ready to receive, low
effective
9 CTS O Serial flow control pin, clear Send, low effective
10 LINK O，PU
"0" - STA connected in AP mode,
Connected to router in STA mode
"1" - disconnected Remain disconnected when
no use
Note:
1. I - input O - output PU – pullingupPD - pullingdown NC - not connected
2. Pin in NC, remains disconnected
Status indicator:
connected to router in STA mode,
STA connected in AP mode——on (output low)converselyoff
EasyConfig, WPS is in one-key configuration——quick flashing
RAK425 Data sheet
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3.3 Design Reference
Figure 3-8 Module Typical Design Reference
RAK425 Data sheet
7
3.4 RAK425 PCBMechanical Size
Figure 3-9 Module Pin Size (mm)
3.5 Reflow Soldering Temperature Graph
Figure 3-10 Temperature Graph
RAK425 Data sheet
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Note:
As shown in Figure 3-8, it is based on the SAC305 lead-free tin paste (3% silver, 0.5%
copper). Alpha OM-338 lead-free cleaning-free flux is recommended. The Figure 6 is mainly used
for guidance. The entire process time is subject to thermal pad number of assembly board and
device Intensity.
3.6 Baking Instructions
The RAK425 module is very sensitive to water. Be cautious to baking the device. At ambient
conditions, it is required that within 168 hours removed from the vacuum packaging, the module
should be processed with the circuit board assembly by reflow soldering; Or stored in the
environment with a relative humidity below 10%. If the condition is not satisfied, the RAK425
must be processed with a 9-hour baking in the environment of 125 ℃before the reflow soldering.
RAK425 Data sheet
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4 Electrical Characteristics
4.1 Absolute Maximum
The following table shows the absolute maximum. Note that the module device may be
damaged when exceeds the maximum. To avoiddamages to the module and the device,please
operate under specified conditions.
Table 4-1: Parameters and Value Range
Parameters Symbols Value Unit
External supply voltage VCC3V3 -0.3~4.0 V
Maximum RF Input (Reference: 50Ω) RFin +10 dBm
When voltage is 3.3V, IO Max voltage 3V3VinIOMax VCC+0.3 V
When voltage is 3.3V, IO Min voltage 3V3VinIOMin -0.3 V
Storage ambient temperature Tstore -65~+135 ℃
ESD resistance ESDHBM 2000 V
4.2 Recommended Operating Parameters
Table 4-2: Recommended Operating Parameter Range
Parameters Symbols Min Value Typical Value Max Value Unit
External voltage Vcc 3.14 3.3 3.46 V
Ambient
temperature Tambient -40 -- +85 ℃
RAK425 Data sheet
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4.3 RF Electrical Characteristics
RF Transmit Specifications
Table 4-3: Partial RF Transmit Specifications
Symbol Parameter Conditions Typical Value Unit
Ftx Frequency range -- 2.4 GHz
Pout
Output power -- -- --
802.11b 1Mbps 14.53 dBm
802.11g 6Mbps 16.84 dBm
802.11n,HT20 MCS0 12.81 dBm
RF Receiver Specifications
Table 4-4: Partial Receiver Specifications
Parameter Test conditions Typical Value Unit
Receiver
sensitivity
11b,1Mbps -97 dBm
11b,2Mbps -92 dBm
11b,5.5Mbps -90 dBm
11b,11Mbps -88 dBm
11g,9Mbps -91 dBm
11g,18Mbps -87 dBm
11g,36Mbps -81 dBm
11g,54Mbps -75 dBm
11n,MCS1,13Mbps -89 dBm
11n,MCS3,26Mbps -82 dBm
11n,MCS5,52Mbps -75 dBm
11n,MCS7,65Mbps -72 dBm
Maximum input
signal
CH7 11g,54Mbps 10 dBm
Adjacent
channel
6Mbps 37 dBc
54Mbps 21 dBc
MCS0 38 dBc
MCS7 20 dBc
RAK425 Data sheet
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4.4 MCU Reset
Figure 4-1 shows the MCU reset timing diagram and reset pulse length. When power on the
module or an exception occurs, the module needs to be reset. RESET pin is internally pulled up,
low input is effective.
3.3V IO Supply
MCU_RESET
TRESET
Figure 4-1: MCU Reset Timing
Table 4-5 shows the description of MCU reset parameters.
Table 4-5: MCU Reset Parameter
Symbol Description typical（mS）
TRESET MCU reset pulse length >10
RAK425 Data sheet
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5 Order Information
5.1 Products
Table 5-1: Product Models
Product Description Single Tray
Packing
Minimum
Package
Development board
corresponding model
RAK425AI-XXXX UART interface module, with on-board antenna ,
use of the straight pin 50pcs/tray 500pcs RAK425AI_EVB
RAK425AL-XXXX UART interface module, with on-board antenna ,
use of the bend pin 50pcs/tray 500pcs RAK425AL_EVB
RAK425AX-XXXX UART interface module, with on-board
antenna ,no pin 50pcs/tray 500pcs RAK425AX_EVB
RAK425 BI-XXXX UART interface module, with external antenna ,
use of the straight pin 50pcs/tray 500pcs RAK425BI_EVB
RAK425BL-XXXX UART interface module, with external antenna,
use of the bend pin 50pcs/tray 500pcs RAK425BL_EVB
RAK425 BX-XXXX UART interface module, with external antenna,no
pin 50pcs/tray 500pcs RAK425BX_EVB
5.2 Description
5.3 Size
Packaging: Hard plastic pallets
Weight: <=3.00g/pcs
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Table 5-2: Thickness (Height)
RAK425 Thickness (Height)
Length * width 20.5mm×15.5mm
Height See the 3.2 module height
FCC
Caution
AnyChangesormodificationsnotexpresslyapprovedbythepartyresponsiblefor
compliancecouldvoidtheuserʹsauthoritytooperatetheequipment.
Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothe
followingtwoconditions:
(1)Thisdevicemaynotcauseharmfulinterference,and
(2)Thisdevicemustacceptanyinterferencereceived,includinginterferencethatmay
causeundesiredoperation.
Radiation
Exposure
Statement
ThisequipmentcomplieswithFCCradiationexposurelimitssetforthforan
5.3
This module is intended for OEM integrator. The OEM integrator is still responsible for the
FCC compliance requirement of the end product, which integrates this module,
product must be labeled in a visible area with the following” Contains FCC ID: 2AF6B-RAKQMR003
the final end
uncontrolledenvironment.Thisequipmentshouldbeinstalledandoperatedwith
minimumdistance20cmbetweentheradiator&yourbody.
RAK425 Data sheet
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6 Sales and Service
Beijing
FAE mailbox: allan.jin@rakwireless.com
Tel : 010-62716015
Fax: 010-62716015
Address: Room 1108, Jin Yanlong Building, Xisanqi Desheng Gate, Haidian District,
Beijing
Shanghai
FAE mailbox: steven.tang@rakwireless.com
Tel : 021-54721182
Fax: 021-54721038
Address: Room 306, Ran East Business Center 1 Building, No.150, 2161 Lane,
Wanyuan road, Minhang District, Shanghai
Shenzhen
FAE mailbox: vincent.wu@rakwireless.com
Tel : 0755-26506594
Fax : 0755-86152201
Address: RM1007,Hangsheng Technology Building,4th South Gaoxing Avenue,
Science and Technology Park,Nanshan District,Shenzhen,China
RAK425 Data sheet
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7 Revision History
Version Modifications Date
V1.0 Initial Draft 2014-02-08
V1.1 Document modification, version release 2014-03-28
V1.2 Modified PCB pin diagram 2014-04-06
V1.3 Update the contact way,Update the document format 2014-08-22
V1.4 Update the Physical picture,Update the Order
Information
2014-08-28
V1.5 Modify some non-standard phrases intervals. 2015-04-15