var chart = c3.generate({
	bindto: '#chart',
	data: {
		url: '/data',
		mimeType: 'json',
		xs: {
			'water_temperature': 'water_temperature_x',
			'air_temperature': 'air_temperature_x'
		},
		names: {
			'water_temperature': 'Wassertemperatur',
			'air_temperature': 'Lufttemperatur'
		}
	},
	axis: {
		x: {
			type: 'timeseries',
			tick: {
				format: '%Y-%m-%d'
			}
		},
		y: {
			label: {
				text: '°C',
				position: 'outer-middle'
			}
		}
	}
});