RFID Academy

How to install a simple switch with the GPIO and the Impinj Speedway Revolution Reader

Document Overview 

  • Wire up a simple switch to turn off / on a Speedway Revolution reader using Speedway Connect and a GPIO box.

Equipment Needed:

  • 1 – Impinj Speedway Revolution RFID reader with Speedway Connect correctly installed and configured
  • 1 – USB B to USB A cable
  • 1 – Power supply with US power cord
  • 1 – Impinj GPIO box
  • 1 – 15 pin straight cable supplied with the GPIO box
    • NOTE: DO NOT USE A STANDARD VGA CABLE OR THE READER WILL BE DAMAGED
  • 1 – Simple toggle switch of your choice (not powered)
  • 1 – Precision flat screw driver to tighten the wire harness
  • 1 – RJ45 network patch cable
  • 6-12 Inches of 20 Gage wire. Cut to desired length.
  • 1 – Pair of wire strippers

Process Flow

  1. Open the clear case of the GPIO box to expose the components inside. See Figure 1.
  2. Orientate the open GPIO box with the external power connection at the bottom and the cable gland facing on the right. See Figure 1.
  3. Locate the 3 power jumpers at the bottom of the box. They will be just to the left of the external power supply connection and just to the right of the 15 pin connection.
  4. Move the bottom 2 jumpers to the left position. This jumper setting will power the GPIO box off of the 5VDC coming directly from the reader. Make sure the top jumper is set to the right.
  5. There are a total of 8 wiring banks on the GPIO unit, with the 4 on the left being GPIs and the 4 on the right being GPOs. Each one is numbered, from 1 – 4, from left to right. Each bank is wired similarly:
    1. Pin 1: Ground
    2. Pin 2: IN(1-4)/OUT(1-4)
    3. Pin 3: 5VDC+
  6. Connect 1 lead of the switch to GPI-1 Pin 2 or (IN1) as it is labeled on the circuit board. Connect the second lead of the switch to GPI-1 Pin 3 or (VCC) as it is labeled on the circuit board. Tighten the wire in the circuit board using a flat precision screwdriver. When the switch is turned off the circuit will be open, which will prevent the 5VDC from reaching the GPI so the reader will be off. When the switch is turned to the on position the circuit will be closed allowing 5VDC to go into the GPI, which will turn the reader on.
  7. Secure the switch and then close the lid on the GPIO box.
  8. Connect the 15 pin cable supplied with the GPIO box from the GPIO box to the Speedway revolution reader GPIO port.
  9. Connect an antenna to the reader. Make sure Speedway Connect is configured correctly with the correct antenna and power settings.
  10. Make sure the switch on the GPIO is in the off position.
  11. Connect the network patch cable from the reader’s Ethernet port to a network port on the host PC. Make sure both reader and host PC are on the same sub network.
  12. Power up the reader by connecting the external power supply to the reader.
  13. Once the reader is powered up, enter the Speedway Connect web console by entering the IP address of the reader along with :8080 in a standard web browser like Internet Explorer.
    1. Example: http://192.168.1.100:8080
  14. Log into the reader using the following information:
    1. Username: root
    2. Password: impinj
    3. You will now be at the Speedway Connect web console menu. See Figure 2.
  15. Navigate to the Reader Settings tab and locate the Triggers box.
  16. To turn the reader on when the switch is on, and to turn the reader off when the switch is turned off; configure with the following settings:
    1. Start Trigger:
      1. Set Start: GPI
      2. Set Port: 1
      3. Set Event: Low
    2. Stop Trigger:
      1. Set Start: GPI
      2. Set Port: 1
      3. Set Event: High
  17. Configure Speedway Connect for USB keyboard emulation as the data output and connect the USB cable from the reader’s USB device port to the host PC.
  18. Click the Save button at the bottom of the screen to make the changes active.
  19. Open up a simple application like Notepad and place the cursor on the screen.
  20. Place a tag on the antenna.
  21. Flip the switch on the GPIO box to the ON position. Tag data should appear on the screen. Turn the switch to the OFF position. Place new tags on the antenna. No new tag data should populate the application, also the antenna LED(s) should be off. Flip ON the switch once again and the new tag data should now populate the screen. 

 

 

 
          Figure 1: Inside the Impinj GPIO Box 
 
 
 
                                    Figure 2: Speedway Connect Reader GPIO Settings

How to wire up an electronic strike to the Impinj GPIO Box

Document Overview

This document will describe how to wire up the Impinj GPIO device to an electric strike plate powered by the external Impinj power supply at 24VDC and 250mA.

Equipment Needed:

  • Impinj Speedway Revolution Reader
  • Impinj GPIO Box
  • Hes 1006 Series Electric Strike @ .25 Amps 24v DC (an example device)
  • Set of Precision Screw Drivers
  • Tweezers
  • GPIO 15 Pin cable
  • (2) Impinj 24vDC Power Supplies

  

 

Process Flow 

  1. Open the cover of the GPIO and orientate the box with the 15 pin connector facing north, and the external cable opening facing west of the technician
  2. Set the power jumpers:
  3. With the top of the GPIO Box off and 15 pin connector facing South:
  4. A brand new GPIO box should have all its original jumpers set to the Right position or East; if not then move any out of place jumpers to the right position (see above image)
  5.     The GPIO is now set to accept 24VDC 250mA from the external power supply
  6. Wire in the Electronic Strike power wires:
  7. (NOTE: make sure the electronic strike is wired up for 24VDC 250mA power)
  8. (NOTE: There are 4 GPO blocks and 4 GPI blocks. Each block has 3 leads GND, OUT1, VCC.(example) All we are concerned with in this example is GND and OUT1)
  9. Locate the GPO bank of connectors.
  10. Locate the first GPO Block. Each block is labeled on the electrical board that should indicate GPO1, GPO2,  GPO3, GPO4 use the first one GPO1
  11. Wire up the strike with one lead connected to GND and the other one in GPO1
  12. The strike is now wired up
  13. Connect 15pin HID cable
  14. Using the cable that came with the GPIO box, connect the 15 pin HID cable from the reader to the GPIO device. If you don't have one or need a longer version you can get one (here). 
  15. Connect external power
  16. Connect the 110VAC power cord to the power supply
  17. Connect the power supply to the GPIO box and screw the connector on to ensure connectivity and that the power cable will not come loose
  18. Connect the power cable to a 110VAC source
  19. GPIO is now successfully wired in
  20. There are LED status lights that will flash as the GPIO is trigged to open and close the electronic strike device. 
  21.  Use the Multireader application to open and close the GPO1 terminal to see the strike open and close to test the solution

 

In order to create an access control solution you need to have software that will drive this application. A low cost way of doing this is with the Transcends Rifidi RFID Software Appliance server. This low cost device can easily convert raw tag reads from the RFID reader into tag events such as tag appear or disappear  This light weight appliance can hold a MySQL data base that has all your access control card IDs associated to trusted individuals that have access to a secure room or the front door of the facility. 

For a low fee you can have this server set up to control the electronic strike or in addition a light stack or an alarm depending on your specific use case. Give us a call if you would like more information about RFID based security or mixed application solutions incorporating inventory management.