TypeError: Arguments to path.join must be strings

[randy993]

Hi there,

I have an issue running this on my Synology NAS. Wondering if you could help me solve the problem.

When I run my code locally, for example;

        var lgtv = require('lgtv2')({
        url: 'ws://192.168.178.31:3000'
    });

    lgtv.on('error', function(err) {
        console.log(err);
    });

    lgtv.on('connect', function() {
        console.log('connected');
        lgtv.request('ssap://system/turnOff', function(err, res) {
            lgtv.disconnect();
        });

    });

It run's fine. However, the same code, deployed to my Synology NAS, results in an error.

TypeError: Arguments to path.join must be strings
at path.js:360:15
at Array.filter (native)
at exports.join (path.js:358:36)
at module.exports (/volume1/web/NodeJS/node_modules/persist-path/index.js:19:22)
at new LGTV (/volume1/web/NodeJS/node_modules/lgtv2/index.js:47:16)
at LGTV (/volume1/web/NodeJS/node_modules/lgtv2/index.js:38:16)
at Object.module.exports.setNetflix (/volume1/web/NodeJS/controllers/tv.js:50:36)
at /volume1/web/NodeJS/routes/routes.js:43:12
at Layer.handle [as handle_request] (/volume1/web/NodeJS/node_modules/express/lib/router/layer.js:95:5)
at next (/volume1/web/NodeJS/node_modules/express/lib/router/route.js:137:13)

The only actual difference I can spot is the NPM version, which is v10.14.1 locally and v0.10.48 on my NAS. Is there any way to bypass this problem and get this working?

[adyromantika]

I had the same error when I tried to run via systemd on the Raspberry Pi. Tracing the stack trace I was able to pinpoint the problem with my service.

lgtv2 uses the persist-path module.

If you look here https://github.com/hobbyquaker/persist-path/blob/master/index.js it looks for either APPDATA or HOME. Either one of those environment variables must be available when running your application.

In my case, I simply left out User directive in my service definition so no HOME variable existed.