Amazon Product List

If you are planning on purchasing any of the items listed here from Amazon, please use the links below. Using these links will provide a small contribution to maintain this site at no additional cost to you. Thank You for your support.

  • Diversitech® WS-1 - Wet Switch Flood Detector
    Diversitech® WS-1 - Wet Switch Flood Detector
  • Twine Portable Wi-Fi Sensor + Full Sensor Package
    Twine Portable Wi-Fi Sensor + Full Sensor Package
  • Getting Started with Raspberry Pi
    Getting Started with Raspberry Pi
  • Edimax EW-7811Un 150 Mbps Wireless 11n Nano Size USB Adapter with EZmax Setup Wizard
    Edimax EW-7811Un 150 Mbps Wireless 11n Nano Size USB Adapter with EZmax Setup Wizard
  • Airlink Fully compatible Wireless N 150 Ultra Mini-USB Adapter (AWLL5099)
    Airlink Fully compatible Wireless N 150 Ultra Mini-USB Adapter (AWLL5099)
  • SB Clear Raspberry Pi Enclosure
    SB Clear Raspberry Pi Enclosure
  • Raspberry Pi User Guide
    Raspberry Pi User Guide
  • Onsite Pro FS1NPTW Whole Home Wireless FloodStop with 1 Inch Valve
    Onsite Pro FS1NPTW Whole Home Wireless FloodStop with 1 Inch Valve
  • Floodstop Washing Machine Valve Shutoff Kit
    Floodstop Washing Machine Valve Shutoff Kit
  • Onsite Pro FS3/4H Washing Machine FloodStop with Straight Valves
    Onsite Pro FS3/4H Washing Machine FloodStop with Straight Valves
  • Aqua Managers - FS 1 1/4-NPT - Floodstop for Water Heaters Water Leak Detection System - White - 1.25 in. pipe
    Aqua Managers - FS 1 1/4-NPT - Floodstop for Water Heaters Water Leak Detection System - White - 1.25 in. pipe
  • Floodstop Individual Water Appliance Additional Water Sensor XS-01
    Floodstop Individual Water Appliance Additional Water Sensor XS-01
  • Furman MP-20 Power Relay Accessory, 20 Amp, Two Outlets, Remote Turn-on from Momentary or Maintained Contact Switches
    Furman MP-20 Power Relay Accessory, 20 Amp, Two Outlets, Remote Turn-on from Momentary or Maintained Contact Switches
  • Furman MP-15 Power Relay Accessory, 15 Amp, Two Outlets, Remote Turn-on from Momentary or Maintained Contact Switches
    Furman MP-15 Power Relay Accessory, 15 Amp, Two Outlets, Remote Turn-on from Momentary or Maintained Contact Switches
  • Watts 500800 Premier Hot Water Recirculation Pump, Blue
    Watts 500800 Premier Hot Water Recirculation Pump, Blue
  • Watt'S Sensor Valve Kit for Hot Water Recirculating Pump (0955801)
    Watt'S Sensor Valve Kit for Hot Water Recirculating Pump (0955801)
  • Kicker 10cvt8-2 Shallow 8
    Kicker 10cvt8-2 Shallow 8" Subwoofer 2-ohm 400 Watts
  • Kenwood Kfc-P709Ps 6.5-Inch Performance Series Component Speaker System
    Kenwood Kfc-P709Ps 6.5-Inch Performance Series Component Speaker System
  • Metra 70-2002 Radio Wiring Harness for Saturn 00-05
    Metra 70-2002 Radio Wiring Harness for Saturn 00-05
  • Metra Reverse Wiring Harness 71-2002 for Select 2000-2005 Saturn Vehicles OEM Radio
    Metra Reverse Wiring Harness 71-2002 for Select 2000-2005 Saturn Vehicles OEM Radio

Contributions

Contributions are very much appreciated and are used to host this website and continue to fund new DIY home automation projects. Thank You for your support.

Entries in raspi (18)

Wednesday
Sep172014

Raspberry Pi - Power up using POE (Power Over Ethernet)

Overview 

(click image to enlarge) While this is certainly far from the first article on how-to power your Raspberry Pi via POE (Power-Over-Ethernet), I thought I would go ahead and document my setup and the equipment I ordered to pull this off successfully.  

First, lets be clear -- I am using a real POE switch -- so I wanted a real POE solution for the Raspberry Pi, not one of those splitter cable solutions that simply supply a fixed power voltage over the unused pairs in a CAT5/6 ethernet cable. There is nothing wrong with that type of solution ... its pretty cost effective, but its not real POE per the IEEE 802.3af (POE) or IEEE 802.3at (POE+) specifications.   

So to pull this off, we need a POE splitter that can provide the required 5 VDC voltage and an adapter micro USB cable to plug into the Raspberry Pi's power port.  (And a short ethernet cable which you may already have laying around the house.)

Shopping List

The following items are included in this article:  

POE Splitter

You need a POE splitter than can output 5 VDC.  I chose the TRENDnet Gigabit Power over Ethernet (PoE) splitter as it has a nice little selector switch where you can select between 5, 7.5, 9, and 12 VDC.  You don't really need the Gigabit capability for the Raspberry Pi since it only supports 10/100 Mbps and TRENDnet does make a 10/100 POE splitter model that costs a little less.  I purchased the Gigabit model thinking about other future projects I have in mind and wanted the additional speed.  

I also (later) purchased the TP-LINK TL-POE10R Gigabit PoE Splitter Adapter adapter which was less expensive and as a bonus included a short CAT-5 ethernet cable.  On the down-side it doesn't have the discrete LEDs specifically identifying which output voltage is selected, but that is a minor trade-off for the reduced cost.

Micro USB Adapter Cable

Since the POE splitter uses a barrel connector and the Raspberry Pi is powered using a micro USB connector, you will need an adapter cable to connect the POE splitter to your Raspberry Pi.  At first I was going to make my own cable from spare cables lying around the house, but then I found this pre-made adapter cable on Amazon that fits perfectly.  (Why reinvent the wheel .. Right?)

Note:  If you would like to purchase multiple quantities of this adapter cable you can order direct from Sean Kelley at Innovative Electronic Solutions and save on combined shipping.  
http://www.innovativeelectronicsolutions.com/ 

Installation Steps

  1. First, before attaching anything to the Raspberry Pi, make sure that the voltage selector on the POE splitter is set to 5 VDC. (You don't want to accidentally fry your Raspberry Pi!)
  2. Connect your POE powered Ethernet cable from your network switch (or from your POE injector if you are using an injector) to the Data Power In port.  Two green LEDs should be illuminated, the POWER LED and the 5V LED.  
  3. Connect the Micro USB adapter cable into the Power Out port and into the micro USB port on your Raspberry Pi.
  4. Connect the short Ethernet patch cable between the Data Out port on the splitter and into the Ethernet jack on your Raspberry Pi.  

Select 5 VDC

Attach POE Ethernet Cable HereConnect power & ethernet to Raspberry Pi

 

 

 

 

Final Results

At this point your Raspberry Pi should be powered up and working.  There is not really much else to say.  Enjoy your POE powered Raspberry Pi :-)