ecg

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1785752/widgets/488935"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1785752/widgets/488936"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1785752/widgets/488937"></iframe>