Thanks kszaq. I thought my box is S905.
I will try the dtb which alexeiyo suggested as we have the same box. Alexeiyo, does the remote work correctly with this dtb?
Yes it works well with the device's RC .
I'd recommend to control it by CEC if your tv supports it.
In the worst case, use remote key mapper addon to assign any key on any remote to any kodi function.
My father's tv doesn't support CEC, so he uses quickplay's infrared rc.