Re: R Pi and Alexa - for Amateur Radio
Back in 2012 I did some ham radio stuff with ASR (automatic speech recognition) at that time Alexa didn't exist that I know of, so I did it with Googles API.
I still have a Raspberry Pi that is listens for two-tone fire and EMS pages. And when that happens the next few seconds of audio are submitted to Googles ASR API and the transcript is logged to file and sent to me as a text message of the call.
Honestly I haven't looked into if there is an API for Alexa or if you have to use their hardware.