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Digi Connect® Wi-ME

Integrated secure 802.11b Wi-Fi WLAN support

Device Cloud by Etherios

The Digi Connect Wi-ME is a fully customizable, future-proof and secure 802.11b wireless embedded system-on-module (SoM) with Wi-Fi WLAN support. Built on leading 32-bit NET+ARM technology, the connector-style module is pin-compatible with the wired Digi Connect ME®, and makes fully transparent 802.11b integration possible without the traditional complexities of hardware and software integration work. The wireless embedded module offers true long-term product availability and state-of-the-art wired and wireless security capabilities such as SSL/TLS and WPA2/802.11i.

Device Cloud

The Digi Connect ME family features the development and operational benefits of Device Cloud by Etherios™. This secure, highly-scalable platform seamlessly ties enterprise applications and remote devices together.

Device Cloud empowers IT, network operations and customer support organizations to conquer the challenges of managing equipment in their device networks. Network managers can remotely configure, upgrade, monitor and troubleshoot remote devices, and create applications that improve productivity, speed and efficiency.

Modules with pre-loaded Digi plug-and-play firmware eliminate software development efforts by providing powerful and configurable IPv4/IPv6 device server functionality, including an easy-to-use web user interface and security features. The system-on-module also offers an industrial operating temperature. Target applications include retail systems, security/access control, medical devices and building/industrial automation.

For custom embedded applications, the IPv6-ready and royalty-free NET+OS® development kits based on the field-proven ThreadX® RTOS offer a complete professional embedded software platform with all integrated building blocks required to create secure network-enabled product designs.

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Featured Models/Part Numbers

  North America: International:  
Digi Connect Wi-ME Digi JumpStart Kit for NET+OS 7 w/Eclipse-based Digi ESP IDE, USB debugger, installation and setup support package
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DC-WME-NET
DC-WME-NET

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Digi Connect Wi-ME Integration Kit - Includes module w/plug-and-play firmware, antenna, development board, documentation, Integration CD, cables and power supply
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DC-WME-KT
DC-WME-KT

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Bulk packs of all modules are available. Please contact us for a list of available part numbers.

Digi JumpStart Kits North America: International:  
Digi Connect Wi-ME Digi JumpStart Kit for NET+OS 7 w/Eclipse-based Digi ESP IDE, USB debugger, installation and setup support package
View details 
DC-WME-NET
DC-WME-NET

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Integration Kits North America: International:  
Digi Connect Wi-ME Integration Kit - Includes module w/plug-and-play firmware, antenna, development board, documentation, Integration CD, cables and power supply
View details 
DC-WME-KT
DC-WME-KT

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Modules with Plug-and-Play Firmware North America: International:  
Digi Connect Wi-ME (single-unit pack with antenna)
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DC-WME-01T-S
DC-WME-01T-S

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Modules for NET+OS North America: International:  
Digi Connect Wi-ME (single-unit pack with antenna)
View details 
DC-WME-01T-C
DC-WME-01T-C

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Specifications Digi Connect ME® Digi Connect® Wi-ME
Hardware
Processor Type 32-bit Digi NS7520 processor
ARM Core ARM7TDMI
Processor Speed 55 MHz
Memory Base Population 2/4 MB NOR flash 4 MB NOR flash
8 MB SDRAM
Pins/Form Factor RJ-45 connector style with 20-pin micro pin header (Samtec FTS-110-01-F-DV-TR)
High-Speed TTL Serial Interface Up to 230 Kbps data rate
Full signal support for TXD, RXD, RTS, CTS, DTR, DSR and DCD
Hardware/Software flow control
GPIO Up to 10 shared with 1 external IRQ
On-module Power Supervisor
JTAG Interface NET+OS development modules only (P/N DC-ME-01T-JT, DC-ME4-01T-JT)
Wave-Solderable Design No clean flux process
Dimensions (L x W x H) 1.445 in (36.7 mm) x 0.75 in (19.05 mm) x 0.854 in (21.69 mm) 1.845 in (46.86 mm) x 0.75 in (19.05 mm) x 0.854 in (21.69 mm)
Network Interface - Wired
Standard IEEE 802.3
Physical Layer 10/100Base-T
Data Rate 10/100 Mbps (auto-sensing)
Mode Full- or half-duplex (auto-sensing)
Connector RJ-45
Integrated Ethernet MAC/PHY
PoE Power Pass-Through
Network Interface – Wireless LAN
Standard IEEE 802.11b
Frequency 2.4 GHz
Data Rate Up to 11 Mbps with automatic fallback
Modulation CCK (11/5.5 Mbps), DQPSK (2 Mbps), DBPSK (1 Mbps)
Typical Transmit Power 16 dBm typical
Receive Sensitivity -66 dBm @ 11 Mbps
Connector 1 x RP-SMA
WLAN Security
WEP (Wired Equivalent Privacy) 64/128-bit encryption (RC4)
WPA/WPA2/802.11i 128-bit TKIP/CCMP (AES) encryption

Enterprise mode (802.1X): LEAP (WEP only), PEAP, TTLS, TLS; EAP-FAST, GTC, MD5, OTP, PAP, CHAP, MSCHAP, MSCHAPv2, TTLS-MSCHAPv2

Pre-shared key mode (PSK/Personal)
Environmental
Operating Temperature -40° C to +85° C (-40° F to +185° F) -30° C to +75° C (-22° F to +167° F)
Storage Temperature -50° C to +125° C (-58° F to +257° F)
Relative Humidity 5% to 90% (non-condensing)
Altitude 12,000 feet (3,658 meters)
Power Requirements (3.3V)
Maximum 270 mA (891 mW) 400 mA (1.32 W)
Regulatory Approvals
FCC Part 15 Class B, EN 55022 Class B
EN 61000-3-2 and EN 61000-3-3
ICES-003 Class B, VCCI Class II, AS 3548
FCC Part 15 Sub C Section 15.247
IC RSS-210 Issue 5 Section 6.2.2(o)
EN 300 328, EN 301 489-17
UL 60950-1, EN 60950 (EU)
CSA C22.2, No. 60950
EN 55024

Digi Connect Wi-ME - Front

Digi Connect Wi-ME - Bottom

Overview
This sample application demonstrates how to create a fully web-enabled and intelligent weather data collection solution. It is built on a Digi Connect ME® embedded module that is connected to a basic and cost-effective weather instrument equipped with a temperature sensor to measure the current temperature and a cup anemometer with integrated wind vane to determine wind speed and direction. The weather instrument is mounted on the roof of the Digi corporate headquarters in Minnetonka, MN, USA.

Image

Click the link below to access live weather information through your web browser.

Image Digi Connect ME weather station live demo

You can also obtain read-only access to the administration pages of the demo by logging in as user "demo" with password "demo".

The number of users that are allowed to access the live demo at the same time is limited. If you should not be able to view the demo at this time, please try again later.

Design and Implementation
The custom embedded NET+OS application running on the Digi Connect ME/Wi-ME module was created using the Digi JumpStart Kit for NET+OS and collects environmental data through the weather instrument's 1-Wire® interface. The information is then made available to web browsers by an integrated web server, which also allows the launch of a custom Java applet to visualize the data through a graphical user interface. The Java applet receives the weather data updates through a simple protocol that is based on standard UDP communication. 

As the diagram above shows, the 1-Wire connection coming from the weather instrument is converted to RS-232 to feed directly to a standard Digi Connect ME/Wi-ME development board, which is used as a simple carrier board platform.

Further hardware integration is possible by designing a discrete solution with native 1-Wire interface components. The flexibility and simplicity of the 1-Wire bus also allows you to integrate additional inexpensive sensors, like barometric pressure, precipitation or humidity, without the need for external power supplies.

The embedded software and the Java applet can also be modified to offer additional functionality such as the logging and charting of historical data or the integration of additional sensor elements.

Developers Only
Please note that you need a Digi JumpStart Kit for NET+OS to compile the NET+OS portion of the application. Contact your local Digi sales office or distributor for information on how and where to purchase it.

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