Can't display data

Hi there,
I’ve been searching for hours but can’t find the solution :frowning:

I have a mySQL DB with a table several information but also : ts varchar(10) NOT NULL for the TimeStamp and rxCounter varchar(10) NOT NULL as a transmission counter

I would simply like to draw rxCounter over time (ts) but it doesn’t work…

If I use this :
SELECT
UNIX_TIMESTAMP(ts) as time_sec,
rxCounter as value,
“FW” as metric
FROM dataFWE
WHERE $__timeFilter(ts)
ORDER BY ts ASC

I have a message saying No Data Points ; indeed when I check with the inspector no data is returned…

Could you please help ?
Franck