Other Parts Discussed in Thread: Z-STACK
We are using the 513K version in our development lab (so we can't verify right now) but looking at the memory map it looks like the Zstack version 3.0.1 stack is still well under 128K, which means that we could go down to 256K flash and preserve using OTA download.
We woulsd like to know for the purpose of cost projection in mass deployment, as the price difference between the 2538 with 256K and 512K flash is significant