Hello,

I use the email alarm extention which basically works as it is designed. As 
soon as a value gets out of range, I get an email. I don't know why, but 
this week, the usb-serial converter for the station got disconnected 
(syslog shows ttyUSB0 disconnected, and afterwards showed up as ttyUSB1). 
Therefore my driver started throwing error messages in the log, but I did 
not get any email messages.

I guess the problem here is, that no value was out of range, because there 
simply was no value. The archive records don't contain the values to check, 
the database shows NONE for most of the values.


Is there an (easy) way to catch a a problem like this and get notified?



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About my station:
I built the station myself, because I have access to professional 
temperature measurement equipment and I want to be albe to calibrate the 
temperature sensor in a dry block calibrator. This is difficult or 
impossible with the standard (consumer) weatherstation hardware. I wrote a 
driver to read the (live - no data storage on the station) values with 
modbus over a RS485 interface. It was running for almost a year without any 
problems, until the USB converter caused a problem.

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