I have a raspberry pi running Alexa (amazon echo) that can instantly push a trigger to IFTTT, for an example I say "Alexa, trigger email to blablabla" and I immediately receive an email.
My Goal I want to execute a bash script on the same raspberry pi with voice command (by Alexa) via IFTTT. Is there any IFTTT recipe that can instantly push a trigger to my raspberry pi? (so that I can instantly run a bash script) (Note: Dropbox doesn't support raspberry pi, though there is an uploader/downloader and the below script uses it with cronjob).
I found one (Raspi Runner) that runs cronjob every few minutes, but I'm not sure if I can setup cronjob for every second and use this script!!
How can I do this?
Short Answer:
IF
This - Alexa
Then
That - Adafruit/Maker Webhook
Longer Answer:
There are two options:
1)Alexa will notify IFTTT that trigger event has occurred. Against which, the action chosen is publishing an MQTT message. This MQTT channel is created by Adafruit. Needless to say, you need to write an MQTT feed reader at the RPi.
2) Maker web-hooks. You expose your RPi to the web, keep a server running on it. Expose a web-service which may be called from the Maker Webhook. This is personally my preferred option, but setup could be a pain, i.e. port forwarding from modem, router etc.
References:
1) Adafruit Official Site
2) MQTT Java Library
3) Hackster Tutorial - With option #1
4) Hackster Tutorial - With option #2
来源：https://stackoverflow.com/questions/43292901/run-bash-script-in-raspberry-pi-via-ifttt