diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index 5cf22a8..08dbed6 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
Service Handle (4 octets)
Opcode 0x9c - Request Read notification
+
+ Notification parameters: Connection ID (4 octets)
+ Trans ID (4 octets)
+ Address (6 octets)
+ Attribute Handle (4 octets)
+ Offset (4 octets)
+ Is Long (1 octet)
+
Opcode 0x9d - Request Write notification
Opcode 0x9e - Request Execute Write notification
Opcode 0x9f - Response Confirmation notification
diff --git a/android/hal-msg.h b/android/hal-msg.h
index cca77a3..4c70d90 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
int32_t server_if;
int32_t srvc_handle;
} __attribute__((packed));
+
+#define HAL_EV_GATT_SERVER_REQUEST_READ 0x9c
+struct hal_ev_gatt_server_request_read {
+ int32_t conn_id;
+ int32_t trans_id;
+ uint8_t bdaddr[6];
+ int32_t attr_handle;
+ int32_t offset;
+ uint8_t is_long;
+} __attribute__((packed));