May 9, 2011
Here is my public channel: https://thingspeak.com/channels/627
This is an ambient light sensor. If you look the graph that appears on the above page, you will see that the vertical axis starts at -500. For some measurements, like this one (ambient light) the axis should not go below zero, because a negative light level is not physically meaningful.
I'm just suggesting that there should be some place to specify that a given channel is measuring positive values only, so the graph can be forced to start at zero or a positive number. Maybe there is that option and I didn't see it, I'm new here. Thanks for the very interesting website / service!
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