Tack, mycket intressant. Tycker ju att det är krångligt med SQL och lätt att ställa frågor som tar orimligt lång tid (min SQL-kunskap har brister, jag vet)Jag slår ett slag för InfluxDB istället för MySQL. Det är helt fel att lagra mätvärden i en SQL, en time series DB är otroligt mycket bättre på det.
Mina queries gick från timmar till sekunder när jag slängde ut MySQL till förmån för InfluxDB.
SQL är bra på vissa saker men riktigt usel på att räkna ut snitt/min/max/gruppera efter tid och dylikt.
Kanon. Så klarat ska mätvärdena vara relaterade till vad de mäter och inte vad de heter.Jag lagrar alla mina värden kopplat med 'sensorname' som inte har något med ursprungssensor att göra utan är ett för mig unikt namn. Det gör att jag kan byta min tempgivare på norrsidan till en helt ny sensor, teknik och så vidare men fortsätta med samma 'sensorname'. Smidigt, anser jag.
Sen ligger koppling till fysisk sensor i en tabell där även ett mer human readable-namn finns.![]()
Kod: Markera allt
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Ja, eller openHAB. De har en one wire-binding, och då får du väldigt mycket väl fungerande infrastruktur på köpet.brimstedt skrev:Hej!
Jag har svårt att tro att mätvärden hemma hos någon skulle ge så mycket data att en sql-db tar timmar att fråga där en timeseries går supersnabbt.. Då har man nog inte indexerat eller modellerat riktigt
Men det jag tänkte säga egentligen - varför inte använda ett existerande system?
zabbix, tex är ett opensourcesystem för övervakning generellt. Funkar att lagra tex temperaturvärden, men har även stöd för övervakning av datorer, mm, så man kan få in mycket grejjer. Sedan har det inbyggt stöd för grafer, dashboards, att skicka varningar via mail eller sms om vissa villkor uppfylls, etc.
Bara ett tips
/Linus