August 1, 2017
I am using an Adafruit thermocouple breakout board and a Particle Photon to transmit temperature data to a plot on my channel. However, every once in awhile, I get zero values in my plot and I do not know why. The serial output from the thermocouple does not show any 0 values. So, it must be on the ThingSpeak side. Does anyone know why this happens, or how to fix it?
March 7, 2017
If you are updating different fields of the same channel, you may see null or zero values in one field. I have created this situation when I have a react that writes values back to a channel with a MATLAB analysis. The analysis writes a status field based on the field values, but every time the status is written, all the other fields see a null result.
It is also possible the extra characters are being written sometimes, based on how the variable you use for your sensor data in the photon are cleared. If there are extra non-printable characters, it is possible that ThingSpeak would interpret those values as strings and you might see them as zeros on your channel view.
Do you see zero values in the data or just on your ThingSpeak plots?
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