Grid Connect

HF-A21-SMT High Performance Embedded WiFi Module - 802.11 b/g/n

Part Number: GC-HF-A21

MPN: HF-A21-SMT-0, HF-A21-SMT-1

List Price: $19.00
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List Price: $19.00
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HF-A21 WiFi Module with Internal PCB Antenna Image - Top View

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  • The HF-A21-SMT module is a compact high performance WiFi module providing 802.11b/g/n 2.4 GHz WiFi networking for a printed circuit board device design. With a rich feature set and an industrial temperature range, this surface mount embedded module is well suited for many applications even in harsh environments. A small footprint makes the HF-A21-SMT easy to use in handheld devices.

    Available with 2 antenna options, the HF-A21-SMT module provides design flexibility to meet specific application requirements or can be used in existing device designs.

    The interface with the HF-A21-SMT is via 10/100 Ethernet and high speed UART. Using either the user-friendly web page or an AT+ instruction set, this module is easy to configure. The HF-A21-SMT can operate in Infrastructure Station (STA) mode, Soft Access Point (AP) mode or AP+STA mode. Support for Ethernet-to-WiFi Router/Bridge mode networking is also provided.

    NOTE: Only the Internal PCB Antenna option has FCC certification.

    HF-A11 Ordering Summary:

    Part # Antenna/Connector Type FCC
    GC-HF-A21-SMT-EXT U.FL/I-PEX Antenna Connector No
    GC-HF-A21-SMT-INT Internal PCB Antenna Yes
    Call for Volume Pricing.

    The knowledgeable and experienced engineers at Grid Connect provide complete technical support for the HF-A11 and the High Flying line of embedded WiFi modules. We offer phone support and on-line chat support during regular business hours.

    • High Performance IEEE 802.11 b/g/n (2.4 GHz) Wi-Fi Module
    • Low cost and Compact Wireless Networking Device (Size 25 x 40 mm)
    • Internal PCB Antenna or External U.FL/IPEX Antenna Options
    • Ethernet and High Speed UART Data Interfaces
    • UART Interface is +5V Compatible and Supports Free/Auto Frame Function
    • TCP/UDP Networking Protocols
    • Maximum of 32 TCP Connections
    • Wireless Security Protocols & Encryption
    • STA/AP/AP+STA (Station and Access Point) Operating Modes
    • Ethernet-to-WiFi Router and Bridge Mode Networking
    • Configuration via Web Page or AT+ Instruction Set
    • +3.3V Power Supply
    • Customizable via SDK (Contact Us)
    • We can customize this product
    • FCC (GC-HF-A21-SMT-INT only) / CE Certification
  • Manufacturers Part Number HF-A21-SMT-0, HF-A21-SMT-1
    Security/Protection WEP/WAP-PSK/WAP2-PSK WEP64/WEP128/TKIP/AES Encryption
    Data Rates
    • UART: 1200 bps - 230400 bps
    • Ethernet : 10/100 Mbps
    Frequency Band 2.4 GHz
    • Wireless: IEEE 802.11b/g/n
    • Serial: UART
    • Network: 10/100 Ethernet
    • GPIO: up to 5 (requires SDK)
    Protocols TCP/UDP
    Management Web Page or AT+ Instruction Set
    Product Weight .1 lb
    Dimensions 40mm x 25mm x 3mm
    Power +3.3V, Current: ~155 mA (400 mA Peak)
    • FCC (GC-HF-A21-SMT-INT option)
    • CE
    • (2) UART (second requires SDK
    • (1) 10/100 Ethernet
    Antenna Options:
    • Internal PCB Antenna
    • U.FL/IPEX Connector
    Temperature Range
    • Operation Environment: -40ºC to 85ºC (-40ºF to 185ºF)
    • Storage Environment: -45ºC to 125ºC (-49º to 257ºF)