I am currently working on monitoring solar radiation data. I don't have any problem in collecting the pyranometer's raw output voltage (mV) data but I do have an issue with collecting solar radiation (W/m2) data. I have my Pi gateway set up in such a way that it collects various data including the above two: i) raw output voltage (mV) and ii) solar radiation (W/m2). Although Ithe gateway is updating the solar radiation (W/m2) data each time the node transmits the graph is not showing anything and it says "no log data" at the top left (see screenshot). This is the first time I have ever encountered this type of issue. Searched in google but couldn't find the relevant issue and the solution. Please help.
Check gateway.sys.log for any errors.
I would try to clear the binary file for that particular metric.
Hello Felix,
Thanks for such a prompt reply. I checked it and found that a repeating error that says:
[02-24-19_06:25:29.564] [ERROR] POST ERROR: ENOENT: no such file or directory, open '/home/pi/gateway/data/db/0099_Solar Radiation (W/m2).bin'.
There are binary files for all other remaining metrics but couldn't find the file for that metric to delete.
Thanks
Error is self explanatory, likely because of the chars in the name.
I think you should try to rename the node/metric and exclude any special characters.
A possible fix in a future version will be to do that automatically when creating the db binary files.
Great! It worked. I think it was the "/" in the metric name "Solar Radiation (W/m2)", as per your suggestion I renamed it to "Solar Radiation (Wm2)" and it is working now.
Thank you Felix.