Amazon Echo Controlled IR Remote

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The Amazon Echo system can control a lot of aspects of a smart home, but a smart outlet can only turn off and on. Many devices do not instantly turn on by simple being plugged in and require additional steps, such as pressing buttons on a remote or the physical device to power on or get the desired settings.

In this guide, a Raspberry Pi Zero W will be configured to act as a smart home device that can be controlled by Amazon Echo, and send any desired IR commands to a device when requested to power on or off.

In this specific case, the Pi will be configured to learn the IR commands of a remote provided with a "ClassicFlame 23II310GRA 23" Infrared Quartz Fireplace Insert". An IR LED will then be used to send out the IR commands on demand, and finally the Pi configured to emulate a Philips Hue device that can be control be Echo.

Step 1: Materials

Required:

  • Raspberry Pi Zero W
  • 4 GB or greater Micro SDHC Class 10 memory card (16 GB Example)
  • MicroUSB
  • 1 IR LED
  • MicroUSB Power Adapter (2.1 amps or higher recommended)
  • IR LED
  • IR Receiver VS/1838B
  • 100 ohm resistor
  • Misc. wire

Recommended:

To complete the initial configuration of a Raspberry Pi Zero W, a few additional peripherals will be required, but will not be in use full time by the completed project

  • Mini HDMI to HDMI Adapter: Used to connect Pi Zero W to a TV or monitor with a full sized HDMI cable
  • USB OTG Cable: Used to convert from micro-USB to full sized USB port(s) for connecting a keyboard and/or mouse
  • HDMI Cable: Used to connect to TV or monitor along with an adapter to mini HDMI

The first two items as well as a case are included various Pi Zero starter kits, such as: MakerSpot Mega Kit

Step 2: Setup Raspberry Pi

The Raspberry Pi website has an excellent walkthrough for setting up Raspbian Stretch OS on a Raspberry Pi. I recommend the Lite version for a smaller footprint if this is only project running on the Pi. If you wish to have more Operating System options in the future, or a more simple setup, following the instructions for NOOBS will get you up and running in no time. This guide is based on Raspbian, which is included with NOOBS

https://www.raspberrypi.org/learning/software-guide/

Once Raspbian is running, enable SSH to allow remote connections to the device without needing a monitor/keyboard/mouse to be connected directly to the Pi. If you would like to optionally have remote access to the GUI, you can also enable VNC access

https://www.raspberrypi.org/documentation/remote-access/ssh/

It is also highly recommended you set a static IP on the wireless network configuration so it does not change over time. It is possible the IP may not change if new devices are not regularly connected to the wireless network, but configuring it as static will ensure it does not.

http://www.circuitbasics.com/how-to-set-up-a-static-ip-on-the-raspberry-pi/

Step 3: Configuring LIRC

The following steps are highly based on the excellent guides found here:

http://alexba.in/blog/2013/01/06/setting-up-lirc-on-the-raspberrypi/
https://camp.isaax.io/en/isaax-examples/ir-control-via-lirc-on-raspberry-pi-zero-w

This guide is based on Rasbian Stretch and lirc 0.9.4c-9
Other guides may be based on earlier versions of and mention a hardware.conf file that is no longer needed with this version and higher. I've also found that it is no longer necessary on my systems to modify the /etc/modules file
At this time, additional changes will be needed for kernel version 4.19 that are not documented here currently. Please ensure you are on 4.14 for this set of instructions

The Linux Infrared Remote Control (LIRC) library is used to handle receiving IR commands through the receiver module, saving them to a file, and then sending the commands when desired through the IR LED.

The first step is to record the IR signals from our existing remote using the IR Receiver and saving them to a file. The IR Receiver is only needed initially to learn the IR signals and then could be removed, so a temporary connection could be used.

    Connect the IR Receiver to the Raspberry Pi. Use the attached picture to identify the VCC, GND, and Signal pins. Using a breadboard, hookup wires, or creative bending of the pins to the following connections

    VCC connects to 5 volt pin
    GND to a ground pin
    Signal to Pin 23

    Power on and connect to the Raspberry Pi through either by opening the terminal on the local device, or creating an SSH connection using a program such as Putty for Windows.

    The following lines can be copied and pasted into the SSH session. They will add/modify lines to various configuration files required for lirc to operate.

    sudo apt update
    sudo apt install -y lirc
    
    echo dtoverlay=lirc-rpi,gpio_in_pin=23,gpio_out_pin=22 | sudo tee -a /boot/config.txt
    
    sudo sed -i '/driver          = */cdriver          = default' /etc/lirc/lirc_options.conf
    sudo sed -i '/device          = */cdevice          = /dev/lirc0' /etc/lirc/lirc_options.conf
    
    sudo shutdown -r now

    Wait for the device to reboot and log in again.

    Optional: Test IR Receiver

    Mount the LIRC device to confirm any input can be received. You may need to restart the Pi after this test is completed to make it available for later steps.

    sudo systemctl stop lircd
    mode2 -d /dev/lirc0
    Aim an IR remote control at the receiver and press a button and ensure data appears on the screen
    CTRL+C to stop

    At this point, the LIRC program is installed and we are able to view IR information.

      Step 4: Capturing IR Codes

      A remote profile can be downloaded from the LIRC website

      http://lirc-remotes.sourceforge.net/remotes-table.html

      and placed in /etc/lirc/lircd.confg.d, or a custom profile can be created with your own remote.

      During this process, you will enter the name of the key/button you are recording. Only valid names are allowed, so run the following command to view all available names

      irrecord --list-namespace 
      Example: I used the name KEY_POWER when I recorded the Power button on my remote and KEY_TIME when recording the timer button.

      If more than a few keys are being recorded, I recommend documenting the key names used and what button they map to, as there may not be a perfect name for the button being recorded. This will make it easier to reference in the future.

      Generate a Remote Configuration file

      Create a new remote control configuration file (using /dev/lirc0)

      sudo systemctl stop lircd
      cd ~
      irrecord -d /dev/lirc0 
      If you encounter an error saying unable to decode data or something went wrong, press CTRL+C to cancel and run the last command as
      irrecord -f -d /dev/lirc0
      this will force the record to run in raw mode and should allow the process to continue

      Follow the directions on the screen. Once the system is initialized, enter the name of the remote you are recording (the resulting file will be based on this name), then enter the key name you are going to record, and then press the button on the remote while pointing it at the receiver until prompted for the next button name. Repeat this step for each button on the remote you wish to record.

      Copy over your new configuration file(s) to the lircd.conf.d directory and start lirc again

      sudo cp ~/*.lircd.conf /etc/lirc/lircd.conf.d
      sudo systemctl start lircd 


      At this point, remote codes have been recorded to a file.

      Step 5: Headphone Jack (Optional)

      To make running wires and modifying the Raspberry Pi more modular, I hot glued a 1/8 inch headphone audio jack to the case and connected wires to the jack. Headphone wires with the matching plug were used to connect the IR LED, so this wire could be routed to an inconspicuous locate to point at the IR receiver of the device I wanted to connect, but could easily be unplugged from the Pi without needing to remove all of the wires.

      This is purely optional, but has come in handy.

      Step 6: Connecting IR LED (Quick)

      Connecting the IR Emitting LED to the Raspberry Pi can be done multiple ways. This step shows the quick way I connected it, but which I found out later can exceed the current limit on the Pi's pins. So far I have not run into any problems, but a more ideal way of connecting is described in the next step

      Calculate the resistor needed for your IR LED. http://ledcalculator.net/ can assist with determining the proper resistor value if you have all specifications of your LED. In this case, the voltage of pin 22 is 3.3 volts, the LED voltage drop is 1.2 volts, current rating is 20 ma, and 1 LED was used, resulting in a value of 110 ohm resistor needed. I used a single 100 ohm resistor.

      Note: It was later brought to my attention that the max current of all pins at any given time is 16 ma, so this configuration could exceed that. A better configuration with a transistor and 5 volt supply is described in the next step, but after several weeks of running in this configuration, I have not encountered any problems yet.

      Pin 22 on the Raspberry Pi will be connected to the anode of the IR LED, which is the longer leg by default.

      The shorter pin of the LED connects to the resistor and then to the ground pin. I cut off most of the wire on the resistor and soldered it directly to a ground pin and to the ground wire going to the LED.

      Step 7: Connecting IR LED (correct Method)

      To properly connect the LED without exceeding the draw limit of the Raspberry Pi, connect the LEDs to the 5 volt supply with appropriate resistor, connect the cathode pin to the collector pin of a 2N2222 resistor, connect the Emitter pin of the transistor to ground, and connect pin 22 of the Pi to a 1K ohm resistor to the base pin of the transistor. This allow a very small current from pin 22 to connect the LED to ground, completing the circuit without over drawing the Pi.

      In my example, I wired up 2 IR LEDs, so I could control ambient lighting as well as the electric fireplace.

      Step 8: Testing Sending IR Commands

      To send an IR command, the program irsend is used.

      Syntax: irsend

      Example: irsend SEND_ONCE Spectrafire KEY_POWER
      This sends the power button command from the Spectrafire remote once. Replace Spectrafire with whatever you named your remote. Repeat with other key names used when recording the file.

      At this stage, you are able to send any commands previously recorded using the IR LED connected to the Raspberry Pi.

      Step 9: Installing Ha-bridge

      To allow the Echo to be able to control our device, we will emulate a Philips Hue bulb using ha-bridge. Once configured, the Echo will be able to detect this device and send power on/off commands to it.

      The website for ha-bridge clearly outlines the process for the current version and is highly recommended to review.

      https://github.com/bwssytems/ha-bridge

      Copy and paste the following lines into an SSH session to install and configure HA Bridge. (It may be necessary to run the first line itself, then paste the remaining lines

      sudo apt install -y oracle-java8-jdk
      
      mkdir /home/pi/habridge
      cd /home/pi/habridge/
      
      rm ha-bridge-*.jar -f
      wget $(curl -s  https://api.github.com/repos/bwssytems/ha-bridge/releases/latest | grep 'browser_' | cut -d\" -f4)
      mv ha-bridge-*.jar ha-bridge.jar
      
      echo [Unit] | sudo tee /etc/systemd/system/habridge.service
      echo Description=HA Bridge | sudo tee -a /etc/systemd/system/habridge.service
      echo Wants=network.target | sudo tee -a /etc/systemd/system/habridge.service
      echo After=network.target | sudo tee -a /etc/systemd/system/habridge.service
      echo  | sudo tee -a /etc/systemd/system/habridge.service
      echo [Service] | sudo tee -a /etc/systemd/system/habridge.service
      echo Type=simple | sudo tee -a /etc/systemd/system/habridge.service
      echo WorkingDirectory=/home/pi/habridge | sudo tee -a /etc/systemd/system/habridge.service
      echo ExecStart=/usr/bin/java -jar -Dconfig.file=/home/pi/habridge/data/habridge.config /home/pi/habridge/ha-bridge.jar | sudo tee -a /etc/systemd/system/habridge.service
      echo  | sudo tee -a /etc/systemd/system/habridge.service
      echo [Install] | sudo tee -a /etc/systemd/system/habridge.service
      echo WantedBy=multi-user.target | sudo tee -a /etc/systemd/system/habridge.service
      
      #Reload System Control and start service, setting to enable at startup
      sudo systemctl daemon-reload
      sudo systemctl start habridge.service
      sudo systemctl enable habridge.service
      
      

      Step 10: Emulating a Philips Hue Bulb

      With ha-bridge running, open a web browser and enter the IP address of the Raspberry Pi, and the interface for ha-bridge should appear.

      Click the Add/Edit link at the top of the page

      Name: Enter the name you want to use when speaking commands

      At the section labeled "On Items" set the type "Execute Command/Script/Program and enter the command in the Target Item box. If multiple commands are desired, click the Add button to save the current line and enter another command. It is also possible to set a delay and repeat a command a certain number of times. In this case, the power button needed pressed first, then the Timer button pressed 3 times to set the auto-off timer for 3 hours.

      Repeat the same idea for the "Off Items" area, clicking Add when finished.

      At the top of the page, click "Add Bridge Device" to save it as a new item, or Update Bridge Device if modifying an existing one.

      Aim the IR LED at the device. On the Bridge Devices page, click the Test ON or Test OFF button to verify it is acting as desired.

      Step 11: Connecting to Amazon Echo

      The last step is to allow the Amazon Echo to communicate with this device. Note: Both devices must be the same network.

      Option 1) say "Alexa, discover smart home devices"

      Option 2) Open the Alexa app, tap on Menu>Smart Home and click the "Discover Devices" link

      After a few moment, the device should be recognized.

      Speak, "Alexa, turn the bedroom fireplace on" and verify that the device turns on as expected. Replace Bedroom Fireplace with whatever you name your device in ha-bridge. Repeat the process to turn off the device.

      If you haven't mounted the IR LED yet, find an inconspicuous place to mount it while allowing it to point in the general direction of the IR receiver in the device. You may need to move it around to point at different areas to find the best location.

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        8 Discussions

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        KRMerf

        5 months ago

        I love this project its exactly what I am looking for to control my cable box. The IR pert worked great I have my new Pi Zero W reading and sending codes. I can control my box using the command line perfectly.
        I am having a problem with this step:
        sudo java -jar /home/pi/habridge/ha-bridge.jar
        about 50 in it stops at this point
        2019-01-28 17:12:12,401 [main] INFO com.bwssystems.HABridge.upnp.UpnpListener - UPNP Discovery Listener running and ready....
        I have tried many things including update and up grade. I downloaded the latest
        wget https://github.com/bwssytems/ha-bridge/releases/d...
        copied it as suggested
        cp ha-bridge-5.2.2RC3.jar ha-bridge.jar
        Any assistance would be greatly appreciated.

        Kev

        3 replies
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        MallocArrayKRMerf

        Reply 5 months ago

        I've reviewed every step in this guide and made a lot of updates to simply configuration by making most of the steps copy and paste so manual editing of files is no longer needed. The steps to install habridge are much easier and updating will be more straight foward. If you are still having trouble, I recommend deleting your habridge folder and trying the updated steps.

        0
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        MallocArrayKRMerf

        Reply 5 months ago

        I setup a new install of Raspbian using my instructions and HA-Bridge started up just fine and has stayed running for the last 2 hours.
        I did tweak the Instructable a bit to have a copy and paste script so you don't have to do so much by hand, it may be worth trying out.

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        MallocArrayKRMerf

        Reply 5 months ago

        I'm not sure I exactly understand what isn't working. "About 50 in..." I'm not sure what you mean. Does it run for awhile and then stop? The version you mentioned looks like a Release Candidate so I would to with whatever the most recent Stable release is and copy it just like you had toward the end of your message.
        Once it is running, open a web browser to the IP address of the Rpi to see the HA Bridge webpage to configure it. Does it run for awhile there and eventually crash?

        It may be that there is an issue with the new versions of Rasbian. Another user contacted me about needing to update some instructions for LIRC but I didn't think it had anything to do with HA Bridge, but I'll review it in a few days and see if anything comes up.

        0
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        Pdoubleyou.

        Question 5 months ago on Step 11

        1.) I was wondering if TWO IR transmitters could be wired in in parallel so the unit could control devices set apart i.e. effectively widening the transmission angle?
        2.) If I needed to chain IR commands what time delay between codes would be needed? Just thinking on my TV [HOME, >, >, OK] would move to the TV home shift two apps to the right and open Plex which would be quite cool!

        1 answer
        0
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        MallocArrayPdoubleyou.

        Answer 5 months ago

        I actually have two IR emitters on my setup, and I believe they are setup in parallel, but I don't recall for certain and it is behind equipment currently. I'm using it to target two different devices with the same cable.

        For the time delay, each device will handle it differently, but for my setup I have 1000 millisecond (1 second) delay between commands. I tried with a shorter delay and it worked most of the time but sometimes would miss a command. Just test it out as it is easy to change in the HA Bridge website on your device.

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        wsetliff

        Question 1 year ago on Step 1

        This project is exactly what I'm looking for. I want to control an ir remote for my fan and have Alexa turn my Xbox "on" as part of my morning routine. Forgive my noobiness, but would you please either post or email a complete schematic of the project (including the transistor powered ir transmitters)? I appreciate the pictures in the project but I'm not clear on what I'm looking at, and I don't understand what the transister is "doing" in the circuit. Thanks so much for posting this project - I have the parts - just hoping for a little more assurance! Thanks again!