InfluxDB grafana reported value is string

Hi! As the title states, the values from my 433 sensors are reported as strings, apparently home assistant can work with it but when I try to get the data to grafana the sensors won’t show up and I GUESS its because the values are reported as strings The zwave sensors work as the values are stored as reals or floats
I don’t really know how I go about to fix this.
The best way would to make the influxDB plug in convert the value before populating the database but I’m not experienced enough to do it my self.

My 433mhz gateway is a rfxtrx433e

If there is any one who could give me a hint in how to proceed I would be really grateful!

Can you post grafana SQL query?