Request

Index Word	Description
0	Header code [0x001400C2]
1	u32 nodeID
2	Size
3	s8, bool flag.
4	Descriptor for static buffer (id 5)
5	Input buffer address. static_buffer_id=5.

Response

Index Word	Description
0	Header code
1	Result code

This seems to be for sending data frames. The input size is unused.

When flag is non-zero, a ring-buffer is used. Otherwise, the data is written into storage which can only contain one frame.