How to count fast digital inputs ?

[ironrider]

Hi all,
i have a water meter that fires every litre.
i have tried to use the GPIO inputs in Domoticz , but they are updated every 10 seconds.
So how can i count those fast inputs?
Does anyone have an idea ?
Thanks

[D'rMorris]

Yes, do not use the GPIO pins directly . Use MySensors or ESP8266 as layer in between. I have a TRCT5000 connected to an Arduino with MySensors and this works very good!