async problem?

[Daniel Weeber]

I am using your library to fetch a snapshot from multiple cameras at once and save them to the local filesystem.
Sometimes it is just working fine, sometimes I have the problem that the same image from the same camera is saved in the wrong file.

I am assuming I've did something wrong with the async function or something similar, so I am looking for help here. :)

const` onvif = require('node-onvif');
const fs = require('fs');

async function kamera_screenshot(ip) {
    let device = new onvif.OnvifDevice({
        xaddr: "http://" + ip + "/onvif/device_service",
        user : 'admin',
        pass : 'admin'
    });
    device.init().then(() => {
        return device.fetchSnapshot().then((res) => {
            fs.writeFile("/tmp/" + ip + ".jpg", res.body, {encoding: 'binary'}, function (fd, err) {
                if (err) throw err;
            });
        });
        });
    return;
}

kamera_screenshot("192.168.0.1");
kamera_screenshot("192.168.0.2");
kamera_screenshot("192.168.0.3");
kamera_screenshot("192.168.0.4");

So, in this example, I have two pictures from camera 192.168.0.1 in the 192.168.0.1.jpg AND 192.168.0.2.jpg (or any other combination)