diff --git a/port/stm32-f4discovery-cc256x/src/btstack_config.h b/port/stm32-f4discovery-cc256x/src/btstack_config.h
index fe950083a..822f9f814 100644
--- a/port/stm32-f4discovery-cc256x/src/btstack_config.h
+++ b/port/stm32-f4discovery-cc256x/src/btstack_config.h
@@ -21,22 +21,23 @@
 
 
 // BTstack configuration. buffers, sizes, ...
-#define HCI_ACL_PAYLOAD_SIZE 52
-#define MAX_SPP_CONNECTIONS 1
+#define HCI_ACL_PAYLOAD_SIZE 1021
 #define MAX_NR_GATT_CLIENTS 1
-#define MAX_NR_HCI_CONNECTIONS MAX_SPP_CONNECTIONS
-#define MAX_NR_L2CAP_SERVICES  2
-#define MAX_NR_L2CAP_CHANNELS  (1+MAX_SPP_CONNECTIONS)
-#define MAX_NR_RFCOMM_MULTIPLEXERS MAX_SPP_CONNECTIONS
+#define MAX_NR_HCI_CONNECTIONS 1
+#define MAX_NR_L2CAP_SERVICES  3
+#define MAX_NR_L2CAP_CHANNELS  3
+#define MAX_NR_RFCOMM_MULTIPLEXERS 1
 #define MAX_NR_RFCOMM_SERVICES 1
-#define MAX_NR_RFCOMM_CHANNELS MAX_SPP_CONNECTIONS
+#define MAX_NR_RFCOMM_CHANNELS 1
 #define MAX_NR_BTSTACK_LINK_KEY_DB_MEMORY_ENTRIES  2
 #define MAX_NR_BNEP_SERVICES 0
 #define MAX_NR_BNEP_CHANNELS 0
-#define MAX_NR_HFP_CONNECTIONS 0
+#define MAX_NR_HFP_CONNECTIONS   1
 #define MAX_NR_WHITELIST_ENTRIES 1
 #define MAX_NR_SM_LOOKUP_ENTRIES 3
 #define MAX_NR_SERVICE_RECORD_ITEMS 1
 #define MAX_NR_LE_DEVICE_DB_ENTRIES 1
+#define MAX_NR_AVDTP_CONNECTIONS 1
+#define MAX_NR_AVDTP_STREAM_ENDPOINTS 1
 
 #endif