Wi-Fi - High Performance (A11) Modules

[fa icon='calendar'] Jul 6, 2015 9:33:55 AM / by Brittney Borowicz posted in 3.3V operation, 802.11b/g/n, A11, access point, antennas, baseband processor, CE Certified, circuit board, configuration utility, Dial Switch, DIP, Ethernet, Ethernet MAC, ethernet to wi-fi, external antennas, FCC, Flash memory, General, high performance modules, Internal chip, IPEX/U.FL antenna connector, IPEX/U.FL connector, IPv4, IPv6, Linux Operating System, local chip antenna, Low Cost High Performance MCU, networking stack, power amplifier, Products, RAM memory, Remote Firmware, RF transceiver, RoHS compliant, router, Serial to Ethernet, serial to wi-fi, Serial UART, SMA antenna connector, SMA connectors, Smart Link, SMT, STA / AP / AP+STA Modes, surface mount, Wi-Fi, wireless firmware, WEP / WPA / WPA2 security modes, Wi-Fi modules, Wi-Fi protocol, Wireless, Wireless MAC, wireless modules

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The High-Flying A11 modules are design for high performance applications normally, using 802.11b/g/n, Ethernet, and local serial ports. The A11 is available in two formats – SMT (surface mount) and DIP (2x7pins). A11 integrates an Ethernet and Wireless MAC, a baseband processor, a RF transceiver along with a power amplifier. The on-board software includes a complete Wi-Fi protocol, configuration utility and networking stack. Applications include access points, routers, serial to Ethernet, serial to Wi-Fi, Ethernet to Wi-Fi bridging and many others.gc-hf-a11_1_1The A11 integrates all Wi-Fi functionality into a low-profile SMT or DIP module package that can be easily mounted on a printed circuit board. The different A11 modules connect to antennas using the local chip antenna (INT), external antennas through the standard IPEX/U.FL connector, or directly through the on-board SMA connectors.

Features:

  • Serial UART, Ethernet, Wi-Fi 802.11b/g/n applications
  • WEP / WPA / WPA2 security modes
  • Low Cost High Performance MCU
  • AP, Router, Bridge, converter applications
  • Includes all the protocol and configuration functions
  • Supports STA / AP / AP+STA Modes
  • Supports Smart Link Function
  • Supports Wireless and Remote Firmware Upgradeable
  • External IPEX/U.FL antenna connector option
  • Internal chip or SMA antenna connector options
  • Supports Dial Switch to Control Power
  • Additional Flash/RAM memory for applications
  • Compact SMT or DIP modules
  • Full IPv4 and IPv6 stack
  • Embedded and Flexible Linux Operating System
  • FCC, CE Certified
  • RoHS compliant
  • Single supply – 3.3V operation

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Ordering Information
Part Numbers / Description / Call for OEM volume pricing

GC-HF-A11-EXT A11 External IPEX/U.FL connector
GC-HF-A11-SMA A11 SMA antenna
GC-HF-A11-INT A11 Internal chip antenna
GC-HF-A11-EVAL A11 Evaluation Kit

GC-HF-A11-SMT-EXT A11 Surface Mount External IPEX/U.FL connector
GC-HF-A11-SMT-INT A11 Surface Mount Internal chip antenna
GC-HF-A11-SMT-EVAL A11 Surface Mount Evaluation Kit

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10 Internet of Things (IoT) Design Considerations: Antenna and Cloud

[fa icon='calendar'] Jan 26, 2015 3:08:13 PM / by Brittney Borowicz posted in access point, antenna, antenna design, bill of materials, BOM, ceramic, circuit board, Cloud, cloud applications, coaxial pigtail, companies, connector, data exchange, end-to-end solutions, gateway, General, Internet of Things, IoT, IoT applications, IoT communications, IoT-enabled device, IPEX, mating connector, metal housing, module manufacturers, on-board chip, pin-out, radio frequencies, radios, router, standard protocol, trace, U.FL, whip, wire, wireless technologies, White Papers, wireless signal

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7. Antenna

Most IoT products use wireless technologies to connect with the world. The type and number of wireless technologies used will impact the type and number of antennas needed. For example, 900MHz, 2.4GHz and 5GHz radios all may have different requirements for antenna design.

Module manufacturers often provide multiple options for antennas, such as an on-board chip or ceramic antennas. They may also offer a wire (or “whip”) antenna, a “trace” antenna, or a “pin-out” so the manufacturer can add their own antenna (either internal or external connector elsewhere on the circuit board). In addition manufacturers may offer U.FL (also called IPEX) connectors for external. In this case, the connection from the U.FL connector to the external antenna is accomplished with a short coaxial “pigtail” that has the mating U.FL connector on one end and the mating connector for the antenna on the other end. The costs of the pigtail and antenna are often overlooked but need to be included in a manufacturer’s BOM for their designs.

When selecting between internal and external antennas, designers must consider the material (metal, plastic, etc.) of the housing and the potential placement of the product within a home or business. If a product is placed behind a couch or under a desk, it may have difficulty getting a wireless signal from the nearest gateway, access point, or router. Metal housings almost always require an external antenna design because the metal in the housing greatly reduces the amount of radio frequencies getting in or out of the housing.

8. Cloud

By definition, most IoT applications include some Cloud-based component. Many manufacturers entering the IoT space are new to Cloud development, which makes decision-making for Cloud applications, such as how and when a product will connect to the Cloud, difficult.

“How” an IoT-enabled device communicates with a cloud application refers to what protocol is being used to communicate with the Cloud. Many early IoT implementations followed a proprietary protocol, where the device manufacturer implements its own protocol to communicate with its cloud applications. Recently, more companies have become aware that a standard protocol is needed for IoT communications to be successful and have started providing third party, end-to-end solutions with platforms to develop and host applications.

“When” an IoT device connects to the cloud, refers to the frequency of data exchange with the cloud application. Devices that are always on (connected to a power supply) can easily stay connected to the cloud constantly. This improves the ability to be “near real time” when communicating with the Cloud application. Battery-powered devices often only connect to the internet and send data periodically in order to conserve battery life. In this case there is a delay, as the device has to re-establish its connection to the wireless router and then to the Cloud server. Battery-powered devices should also consider a “heart-beat,” so that the device connects to the Cloud application periodically without an event to trigger it. This allows the application to know the device is still online and has power or battery-life remaining for when an event does occur.

10IOTDESIGNCONSIDERATIONS_BANNER

>  For more information, please call Grid Connect Inc. at +1 (630) 245-1445, or email us at iot@gridconnect.com.

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