spkr-select | Speaker Select v2.0 - Python , Flask , Gunicorn | REST library

UPDATE 04/2019: Now with 100% more schematics.
I've created a script to install this automatically and I believe it will work well with at least Raspberry Pi OS Buster (08-2020). Your mileage may vary, and if you experience any trouble try the below Manual Install.
Optionally, you can use supervisor's built in HTTP server to monitor the scripts.
Some configuration may be required for your IR remote control. I chose an existing remote control schema that I could use with my Logitech Harmony remote. If you would like to use the same configuration with your programmable remote (such as the Logitech Harmony), use the below steps to setup and install lirc, and the lirc python module. I'm emulating the buttons on the RF-Link AVS-411 since it's something that is supported by the Harmony remote and it has a similar functionality to what I'm looking for. The folowing only works for Raspberry Pi OS Buster 2020-08 (and possibly greater). Every time a new version of the OS comes along it seems there are quirks that need to be worked out to get this working again.
Optionally, you may want to be able to control the speaker selection via Google Assistant or via the IFTTT WebHooks. I have setup an API interface to allow HTTPS calls to control the speaker settings. The nginx reverse proxy will allow HTTPS (port 443) calls to be sent to the /extapi application route only. To avoid having to obtain a certificate from an certificate authority (and potentially have to purchase a domain), I'm providing instructions here how to self-sign a certificate that can be used in conjunction with the nginx webserver. Because the self-signed certificate is only good enough to encrypt traffic between IFTTT and the application, and not to confirm the correct identity of the requester, a shared API key secret must be provided by the service to perform any actions. In order to properly use this, you must provide a certificate for nginx to use (see the nginx setup above, where this should be taken care of by default) so that a secure connection can be created between the client and server. Additionally, an API key should be generated and stored by going to the admin page of the application, and enabling the API interface. Additionally, the router must be configured to redirect from an external port (preferably a random port number) to the IP of your speaker-select raspberry pi, and port 443. This setup will vary from router to router, but this is usually in NAT configuration or Port Forwarding. Also, since most of us are on residential internet service, and have IP addresses that are assigned dynamically to our modems, you may want to setup a Dynamic DNS service which assign a simple URL to forward web requests to your IP, and update the IP when it changes. I won't cover how this works in this guide, however I would recommend that you do some web searches for dynamic DNS. I would also recommend DuckDNS who provide a completely free service for dynamic IP addresses. It's more bare-bones than something like DynDNS, but free is a pretty good price. Once this is setup, you'll want to configure an applet in IFTTT call your API, with your API key and the actions you want to take. Ensure your IFTTT call is using the HTTPS protocol to protect your API key in transit. The application should not respond to non-SSL based requests and should only work properly with the correct API key. No other interfaces are accessible via this API. Your API Key can be enabled in the Admin settings page. You can also regenerate a new key if you'd like by clicking the "Generate New API Key" button. Go to https://IFTTT.com and add a new applet. Select Google Assistant and select "Say a simple phrase and trigger an action". You will want to use the phrase that you'd like to trigger an action like "Turn on all the speakers." or "Hey Google, Turn off the Kitchen Speakers".
URL: If you are using a dynamic DNS service or if you are using a doman that you have already registered, you can simply use this to point to your instance. Example: https://yoursite.duckdns.org:34534/extapi/AbCdEfGHiJkLMnOPqrSTuVwXyZ012345 Note that the HTTPS portion of the URL is very important - since regular unsecure HTTP calls will be rejected by this app.
Method: POST
Content Type: application/x-www-form-urlencoded
Body: This can be any combination of speaker settings either on or off, separated by an ampersand '&'. For example: spkrs_01=on&spkrs_02=on&spkrs_03=off which would turn Speakers 1 & 2 on and Speakers 3 off.