Demo

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/332895/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=500&title=Digital+Input&type=line&xaxis=Time&yaxis=Digital+State"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/332895/charts/2?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=500&title=Light+Intensity&type=line&xaxis=Time&yaxis=Light+Intensity"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/apps/matlab_visualizations/173197"></iframe>