max number of message clusters

I can't dig into the code to find out the exact number, but it's likely a 16-bit number or 65536. Home Automation uses about 70 clusters. Do you have an application that requires a lot more than this?

Scott

thanks

I have add 10 clusters to the existing 9 in location code, and I encountered several conflicts , outgoing clusters cause wrong incoming cluster, not  expected

but maybe it come  from my interface and serial I/O , and not zstack if you say 70 clusters is possible