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      TP-Link WR703N Expander
      • TP-Link WR703N Expander
      • TP-Link WR703N Expander
      • TP-Link WR703N Expander
      • TP-Link WR703N Expander

      TP-Link WR703N Expander

      SKU 103990001
      The WR703N Expander is a compact PCB providing a 4 port USB hub and dual FTDI serial ports, with additional GPIO
      $25.90
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      $25.90/1pcs+
      $23.31/10pcs+
      $22.02/20pcs+
      Description
      The WR703N Expander is a compact PCB providing a 4 port USB hub and dual FTDI serial ports, with additional GPIO.  It is perfect for use with the small TP-Link WR703N Linux based wireless router, or with almost any computer with USB (e.g. PC, Raspberry Pi, BBB, etc).  The USB hub makes it easy to add a USB flash drive to expand the routers internal flash storage, and provide connection of additional USB devices (webcam, keyboard, sound, co-processor, etc), while the serial ports and GPIO allow versatile connectivity to other devices.
       
      It was designed by Kean Electronics in conjunction with Robots & Dinosaurs for control and automation projects, and has been used in various designs such as robotics, smart LED lighting control, and wireless sharing of quadcopter webcams.
       
       
      Features
      • Compact size - designed to piggy back above WR703N router PCB
      • Uplink USB port can be via mini-B, or 4 pin header to connect to WR703N
      • 3 available USB ports with alternate connection options (4 pin header or USB A female)
      • 2 FTDI virtual COM (serial) ports – using common 6 pin FTDI pinout (with RTS/CTS)
      • Selectable 3.3V or 5V I/O voltages for Port A and Port B
      • 8 GPIO (part of Port A) – see GPIO pinout below
      • EEPROM for use with FTDI FT_PROG configuration utility
      • Incorporates FTDI MPSSE functions – allows SPI/I2C/JTAG emulation (e.g. see FTDI App Note AP_135)
      • Can be powered from WR703N, or supply power to WR703N (short R113 on router)
      • Works with most operating systems (FTDI driver required)
      • Open source hardware design
      • Info on OpenWRT and the WR703N available at http://wiki.openwrt.org/toh/tp-link/tl-wr703nandhttp://www.madox.net/blog/projects/tp-link-tl-wr703n/
       
      Important
      Note this unit does not include the TP-Link WR703N router
       
      Specification
      • Uses Genesys Logic GL850G USB hub IC, and FT2232L dual serial IC
      • Connectors for USB and I/O come separately to allow end user customisation
      • Weight: approx 7g-20g (depending on connectors installed)
      • Size: 48x50x3mm (without connectors)
      • PDFSchematic
      • Eagle design files SCH&BRD

       

      GPIO pinout (OC = Open Collector)

      J1 pin    FT2232 name       VCP function (Port A)

      1         ADBUS4 / GPIOL0   DTR# (out)
      2         ADBUS5 / GPIOL1   DSR# (in)
      3         ADBUS6 / GPIOL2   DCD# (in)
      4         ADBUS7 / GPIOL3   RI#  (in)
      5         ACBUS0 / GPIOH0   TXDEN (out)
      6         ACBUS1 / GPIOH1   SLEEP# (out)
      7         ACBUS2 / GPIOH2   RXLED# (OC out)
      8         ACBUS3 / GPIOH3   TXLED# (OC out)
      9         5V - note above pins use logic voltage set by JMP3 (VCCA)
      10        GND
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