Color switch using HsbColor1's mqtt command

I’m configuring an ikea TRADFRI Remote 5 button to command an rgb light that work with tasmota fw
the configuration is made by automation and I have do a lot of thing, power on\off, increase decrease light, set a default warm and cold light…
I miss only one thing, I wanna use next and prev button to rotate color of the light,
HsbColor1 set the hue of color with a value from 0 to 360 (like a wheel) .
But with this code:

  action: 
   - service: mqtt.publish
     data_template:
       topic: 'cmnd/rgbw_cam/HsbColor1'
       payload: >
       20

I can only set a hue value
I need instead to increase the current hue value by a fixed value
How to do?
Thanks

no one have an idea?

what is the topic you’re using with tasmota? I can change my values through a geeni light and tasmota via the ha/merkury-strip/office/cmnd/HSBColor1

You’d need to adjust depending on your topics

hope this helps

I resolve with this