I have a Raspberry Pi set up with a Node.js app that responds when it sees button push from an Amazon Dash Button. It was originally supposed to be a silent doorbell from https://github.com/initialstate/silent-doorbell, but I would like to just have it play a local sound file. Which I think should be easy enough, but my inexperience with coding leaves me just trying new stuff that I find all over the internet.
I can play the file from the terminal with the following and it plays just fine:
$ omxplayer example.mp3
But, no matter how I try to put it in the Node.js app and trigger when the Dash Button is pressed it won't work.
var dash_button = require('node-dash-button'),
dash = dash_button('XX:XX:XX:XX:XX:XX'), //REPLACE WITH YOUR ADDRESS
exec = require('child_process').exec;
Omx = require('node-omxplayer');
player = Omx('~/node_modules/node-dash-button/example.mp3');
let spawn = require('child_process').spawn;
dash.on('detected', function() {
console.log('Button pushed!');
player.play();
});
When run with my latest as above, I get this:
/home/pi/node_modules/node-dash-button/doorbell.js:7
let spawn = require('child_process').spawn;
^^^^^
SyntaxError: Unexpected identifier
at exports.runInThisContext (vm.js:73:16)
at Module._compile (module.js:443:25)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
at startup (node.js:129:16)
at node.js:814:3
After upgrading Node.js to the newest version as suggested by @Quentin using the Major Version Upgrade directions on this site http://thisdavej.com/upgrading-to-more-recent-versions-of-node-js-on-the-raspberry-pi/ I was able to get past this. Now I can't get past how to properly use omxplayer. When running the same code as above after the Node.js upgrade I now get this error after pressing the Amazon Dash button which then crashes the app:
pi@raspberrypi:~/node_modules/node-dash-button $ sudo node doorbell.js
Button pushed!
/home/pi/node_modules/node-omxplayer/index.js:103
throw new Error('Player is closed.');
^
Error: Player is closed.
at writeStdin (/home/pi/node_modules/node-omxplayer/index.js:103:10)
at EventEmitter.Omx.omxplayer.play (/home/pi/node_modules/node-omxplayer/index.js:133:27)
at Readable.<anonymous> (/home/pi/node_modules/node-dash-button/doorbell.js:13:12)
at emitOne (events.js:96:13)
at Readable.emit (events.js:188:7)
at PcapSession.<anonymous> (/home/pi/node_modules/node-dash-button/index.js:87:28)
at emitOne (events.js:96:13)
at PcapSession.emit (events.js:188:7)
at PcapSession.on_packet_ready (/home/pi/node_modules/node-dash-button/node_modules/pcap/pcap.js:99:10)
at packet_ready (/home/pi/node_modules/node-dash-button/node_modules/pcap/pcap.js:44:14)
I tried a few different things to try and get the player to spawn with no luck. The index.js file referenced mentions to use the player.running command but I still get the player is closed error when attempting to use this.
