IQRF GW-WIFI-01 User manual

© 2018 IQRF Tech s.r.o. www.iqrf.tech www.iqrf.org User_Guide_GW-WIFI-01_180511 Page 1
GW-WIFI-01
IQRF WiFi Gateway
User’s Guide

GW-WIFI-01
© 2018IQRF Tech s.r.o. www.iqrf.tech www.iqrf.org User_Guide_GW-WIFI-01_180511 Page 2
Block diagram
Description
GW-WIFI-01 is an IQRF gateway for connection between
IQRF and WiFi networks allowing remote monitoring, data
collection and control of IQRF network.
The gateway communicates outside the IQRF network via
WiFi.Configuration is possible via internal www server, IQRF
IDE or SD card.
GW-WIFI-01 allows communication with IQRF IDE to
configure internal TR module and simply create an IQRF
network. It is fully compatible with the DPA protocol. Non-
DPA applications are supported as well.
Applications
Remote monitoring and control
Data acquisition / collection
Datalogger, IQRF Cloud supported
Interface to building / home automation
Connection of more IQRF networks to single PC
DPA as well as non-DPA applications supported
Key features
HTTP client for communication with IQRF Cloud server
HTTP server for remote management
UDP server/client for communication with IQRF network
DDNS support
SNTP client for getting date and time from Internet
DHCP server/client for automated getting of IP address
NBNS server for using names instead of IP addresses
RTCC (real time clock/calendar)
Firmware upgrade via web server / SD card
Upgrade of application in internal TR module via web
server / IQRF IDE / SD card
DPA and IQRF IDE compatible

GW-WIFI-01
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This gateway can beusedeitherwith TRaswellas with DCTRtransceivers. For simplicity, only TR is mainly used further on throughout
this document.
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be
superseded by updates. It is your responsibility to ensure that your application meets with your specifications.
IQRF Tech MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND TO STATED CONDITION, QUALITY,
PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE and disclaims all liability arising from this information and its
use. Use of IQRF Tech devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend,
indemnify and hold harmless IQRF Tech from any and all damages, claims, suits, or expenses resulting from such use. No licenses
are conveyed, implicitly or otherwise, under any IQRF Tech intellectual property rights.
Electrical specifications (Typical values unless otherwise stated)
Power supply 5.0 ± 0.35 V DC
Accumulator Li-Ion, 3.7 V, 700 mAh
Supply current
Off 6 µA
Sleep 85 mA
On 250 mA (not charging), 310 mA max. (charging)
Charge current 215 mA max.
Accumulator operating hours ~ 2 hours
Temperature range
Operating 0 °C to +60 °C
Storage 10 °C to +20 °C (recommended)
IQRF
Frequency bands 868 MHz or 916 MHz (SW configurable)
RF output power According to TR module, programmable in 8 steps
TR module (DC)TR-72DA or DCTR-52DA
Antenna PCB antenna built-in TR module
EEPROM 24AA16-I/MC, 16 Kb, 1 000 000 erase/write cycles min.
Flash memory SST25VF080B, 8 Mb, 100 000 erase/write cycles typ.
SD card Up to 2 GB
WiFi 802.11g
USB Custom class
Dimensions 87 mm x 62 mm x 26 mm
Weight 70 g
Absolute maximum ratings
Stresses above those values may cause permanent damage to the device. Exposure to maximum rating conditions for
extended periods may affect device reliability.
Supply voltage (VCC) 5.5 V
Storage temperature -20 °C to +60 °C

GW-WIFI-01
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Hardware
Main components are: 32b microcontroller, WiFi module, EEPROM memory, serial Flash memory, SD memory card, IQRF
transceiver module with antenna and RTCC.
Power supply
GW-WIFI-01 should be supplied via standard micro USB connector by external stabilized 5 V DC, e.g. from the power source
delivered with the GW or from USB interface. The accumulator is shared for RTCC as well as other circuitry. It is intended
for backup supply only.
Power modes
On Operational mode. The GW is fully functional. If external power supply is connected, the accumulator is charged
(until being full). If external power supply is not connected, the GW is supplied from the accumulator. Complete GW
initialization is performed when switching to On mode (either from Off or Sleep).
Sleep Power saving mode. It is only available if external power supply is connected. TR as well as WiFi modules are
disabled, no communication is possible. The accumulator is charged (until being full).
Off It is only available if external power supply is disconnected. Except of RTCC, all other circuitry is disconnected from
power supply and all other functionality is disabled. RTCC keeps running, powered from the accumulator. The
accumulator is not charged.
Switching over to anothermode can be controlled by the Control pushbutton. See chapter Pushbuttons. Additionally, the GW
is switched Off automatically if accumulator voltage drops below 3.2 V (when supplied from the accumulator in On mode) or
if external power is disconnected in Sleep mode.

GW-WIFI-01
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WiFi
2.4 GHz UHF band is used.
USB
USB interface enables an interconnection between the GW and a PC with IQRF IDE development software. It is intended for
uploading the application code into internal TR transceiver, debugging the application and GW configuration using the GW
Tool (a SW component of IQRF IDE for managing IQRF gateways).
Pushbuttons
Both Reset and Control pushbutton functionality is fixed and can not be changed in application program.
Control
Short press (< 1 s): No effect
Long press (1 s to 10 s): GW off
Long press (> 10 s): Restore the factory settings of the gateway. (After 10 s all LEDs get off to indicate that the
factory setting was restored.)
Reset
Reset button can be pressed by a pin through the hole in the case. It is intended to reset the gateway (equally to switching
the GW off and on). Current GW configuration stays unchanged. For reinitializing the GW (to restore the factory settings),
use menu Maintenance › Factory Defaults at Web server or user pushbutton.
LEDs
See Appendix 1 –LED indication.
RF
(DC)TR-72DA or DCTR-52DA wireless transceiver module is used for IQRF connectivity. Antenna is built in TR module.
EEPROM
Internal serial EEPROM is intended to store the data for GW configuration. It is not available for user application SW.
Flash memory
Log data is stored in circular buffer in Flash memory. When it is full and a subsequent write is performed, then it starts
overwriting the oldest data.
There is 252 KB dedicated to IQRF RX data and 128 KB for IQRF TX data and same size for System log.
The number of records of IQRF RX/TX data depends on the parameter Packet size, which define howmany payload data
bytes is dedicated for every data record. For default setting (Packet size = 64 B) there is 3308 positions for IQRF RX
and 1680 positions for IQRF TX. For System log there is always 6553 positions in the buffer.
The actual size of the data log is the Packet size + 14 B, where the additional 14 bytes are used for saving date, time
and index of the log. In this way the user can calculate actual number of positions in the buffer.
Data volumes and recording frequency must be taken in account with respect to the Flash memory endurance.
When the Packet size is changed in the GW settings, all logs are cleared.
Case
Caution: It is not allowed to open the GW case otherwise the device may be damaged.

GW-WIFI-01
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Operation
Start up
GW-WIFI-01 is turned on by connecting a USB power supply or by pressing the Control button to be supplied from internal
accumulator (when no external power source is connected).
Initialization
After the start-up, the GW checks its own hardware first. If there is no critical error it starts to initialize WiFi connection. When
a critical error occurs, the execution does not continue and the error code is indicated by LEDs.
Communication
The size of payload IQRF data transmitted between the GW and the IQRF network is limited to 64 B in both directions.
GW-WIFI-01 can work in the following modes:
WiFi Access point
Special service mode intended to WiFi interface configuration.
GW-WIFI-01 works in WiFi access point mode when it is started for the first time after delivering from the factory or after
restoring the factory defaults (by the Factory defaults pushbutton or via the web interface). Then, similarly as a WiFi router,
the GW allows to connect aWiFi device. This connection is only intended to configure the GW for subsequent operation, e.g.
selecting the operation mode (datalogger or gateway) and setting other GW parameters (selected WiFi network, passwords
etc.). After the configuration and restart the GW starts to work as a WiFi client and attempts to connect the WiFi network
specified in the configuration.
WiFi client - Datalogger mode
All incoming IQRF data (IQRF RX) is stored and logged in internal Flash memory. When used with IQRF Cloud, the logged
data is transmitted to the Cloud server always after the Cloud period elapsed. See chapters IQRF IDE –GW Tool and Web
server.
Data to be sent to IQRF (IQRF TX) is stored in internal Flash memory. When used with IQRF Cloud, the data is stored in the
Cloud server first, transferred to the GW always after the Cloud period elapsed and then forwarded to IQRF network.
If the communication between the GW and the Cloud server failed, the GW indicates an error.

GW-WIFI-01
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WiFi client –Gateway mode
Direct connection between IQRF networks and remote device via UDP channel is established.
The communication uses a specific application protocol, see chapter Application protocol for UDP channel.
Errors in communication between the GW and the remote device should be solved by the user application.
Using IQRF IDE
The IQRF IDE GW Tool is intended for GW configuration, checking of operational and error states and for access to the
datalogger. When using the GW Tool, the communication via WiFi is enabled.
Additionally, IQRF IDE can be used similarly as for the CK-USB-04(A): uploading the code into TR transceiver, configuration
of TRmodule insidethe GW (includingAccess password and User key, see IQRF OS v4.xx User’s guide, chapter Encryption),
debugging of the application, using the IQMESH Network manager etc. In this mode the communication via Ethernet is
disabled.
Internal web server
To get connected to the internal web server, it is necessary to know IP address of the GW or the GW host name (if the
network supports the NBNS, i.e. within the LAN only). Internal web server is used for GW configuration (manually in graphic
environment or by loading a binary file *.gwcnfg), TR programming (*.hex, *.iqrf), TR configuration (*.trcnfg,
excluding Access password and User key for encryption) and FW upgrading (gwwifi.hex). When uploading any of these
files, it is necessary to have SD card plugged in the GW card slot, otherwise the operation can not be completed.
GW configuration
GW configuration is possible via internal www server, IQRF IDE or (especially for troubleshooting) via SD card.

GW-WIFI-01
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SD card file structure
The SD card is intended for development, service and maintenance. It should be accessed primarily by the GW while direct
writing by the user (externally by a standard SD card reader/writer) is recommended for exceptional purposes only. The
standard way to perform required changes is using the internal web server.
The SD card uses the following folders:
Root The root directory is intended for a new FW (gwwifi.hex file) to be used for upgrade.
TRUPLOAD The folder intended for files to be uploaded into the TR module (*.hex, *.iqrf, *.trcnfg).
GWCNFG The folder intended to record a new GW configuration (*.gwcnfg).
BACKUP The folder intended for current GW configuration (gw.gwcnfg).
When using the web server, all folders and files are created automatically when required. In case of external direct writing
the required folders must be created by the user. Files not necessary any more are automatically deleted after the usage.
System log
All important events are logged. System logs can be read using IQRF IDE GW Tool.
Date and time
GW-WIFI-01 contains a real time clock/calendar (RTCC). Date and time are synchronized using SNTP/Cloud server.
TR module data exchange
Data between the internal TR module and the GW memory is transferred bidirectionally via SPI (using the bufferCOM
memory array inside the TR module). Therefore, the application in TR must have the SPI communication activated. When
using DPA, a hardware profile with SPI interface must be uploaded in TR. Such plug-in is uploaded from the factory. The
maximum SPI packet length is 64 B.
LAN services
HTTP client Communication with IQRF Cloud server (using 128 b AES encryption)
HTTP server Web pages for remote management via a common browser
HTTP client Getting and updating of public address from DDNS
UDP server/client Communication with IQRF network and for remote GW management
SNTP client Getting date and time from time server
ICMP server Allowing “ping” to GW from a remote host
DHCP server For IP addresses dedicated to one client (when the GW works in Access point mode)
DHCP client Automated getting of IP address from the DHCP server
NBNS server For using names instead of IP addresses within the LAN

GW-WIFI-01
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GW identification
MAC address
Every device has a unique MAC address in the format 00 1F D5 xx xx xx, where:
00 1F D5 is the OUI dedicated to MICRORISC s.r.o.
xx xx xx is a device serial number
Actual MAC address is printed on the label at the bottom of the GW-WIFI-01 case.
ID
Another unique number (manufacturer's identification) used to identify the gateway by IQRF IDE, the IQRF Cloud server and
user applications utilizing the Cloud via API.
For GW-WIFI-01: ID = 10 xx xx xx, where xx xx xx are last 6 digits of the MAC address.
NBNS Name
iqrf-xxxx, where xxxx are the last 4 digits of the MAC address.

GW-WIFI-01
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IQRF Cloud
The IQRF Cloud provides an effective way to exchange data between IQRF wireless device(s) and a user superordinary
system implemented by a higher level platform (e.g. PHP, JavaScript or web interface) and connected via Internet or a LAN.
As an interface to IQRF, the GW-WIFI-01 or another IQRF gateway providing Internet connectivity (Ethernet, GPRS or WiFi)
is intended.
An IQRF Cloud server is available on http(s)://cloud.iqrf.org provided by CIS (Complete Internet Services, s.r.o.,
an IQRF contractual partner for cloud solutions). Moreover, a licensed version is available for every user of an IQRF gateway
preferring to implement and operate one's own IQRF Cloud. Refer to the IQRF Cloud User's Guide for details.