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This depends on the available free RAM as well as buffer usage.
You can use the wiced_bt_get_buffer_usage api to get the buffer utilization of the stack buffer pools. Please refer to WICED-Application-Buffer-Pools.pdf doc available in WICED SDK ( /20706-A2_Bluetooth/doc/WICED-Application-Buffer-Pools.pdf )
To get the available free RAM bytes at run-time, use the wiced_memory_get_free_bytes ( /20706-A2_Bluetooth/include/wiced_memory.h ) api