SET_MESSAGE_INTERVAL in mavproxy

Hi all
We have multiple rovers connected in a mesh network to one mavproxy running on a pi where we connect with WiFi with our self developed app. Generally we want only to receive heading, position and some other parameters. From time to time we would send some mission commands from the app over mavproxy to specific rovers.
Now to reduce data/bandwidth we would like the rovers only to send the necessary data with low frequency (<1Hz).
Can someone give us a head start how to implement SET_MESSAGE_INTERVAL for only the needed parameter in mavproxy.py?
Thanks
mat

Now to reduce data/bandwidth we would like the rovers only to send the necessary data with low frequency (<1Hz).
Can someone give us a head start how to implement SET_MESSAGE_INTERVAL for only the needed parameter in mavproxy.py?

set streamrate 0
long SET_MESSAGE_INTERVAL 30 1000000

mat

Peter