diff --git a/Makefile b/Makefile
index e6191af2..14c61e1e 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@
 ROOT_DIR      := $(CURDIR)
 BR_VER        := 2020.02
 BR_DIR        := $(ROOT_DIR)/buildroot-$(BR_VER)
-BR_EXT_DIR    := $(ROOT_DIR)/br-ext-chip-hisilicon
-#BR_EXT_DIR    := $(ROOT_DIR)/br-ext-chip-sigmastar
+#BR_EXT_DIR    := $(ROOT_DIR)/br-ext-chip-hisilicon
+BR_EXT_DIR    := $(ROOT_DIR)/br-ext-chip-sigmastar
 #BR_EXT_DIR    := $(ROOT_DIR)/br-ext-chip-xiongmai
 SCRIPTS_DIR   := $(ROOT_DIR)/scripts
 BOARDS        := $(shell ls -1 $(BR_EXT_DIR)/configs)
diff --git a/br-ext-chip-sigmastar/board/infinity3/kernel/overlay/.gitkeep b/br-ext-chip-sigmastar/board/infinity3/kernel/overlay/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/br-ext-chip-sigmastar/board/infinity3/kernel/patches/.gitkeep b/br-ext-chip-sigmastar/board/infinity3/kernel/patches/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/br-ext-chip-sigmastar/board/infinity6b0/kernel/overlay/.gitkeep b/br-ext-chip-sigmastar/board/infinity6b0/kernel/overlay/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/br-ext-chip-sigmastar/board/infinity6b0/kernel/patches/.gitkeep b/br-ext-chip-sigmastar/board/infinity6b0/kernel/patches/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/br-ext-chip-sigmastar/configs/unknown_unknown_ssc313e_openipc_defconfig b/br-ext-chip-sigmastar/configs/unknown_unknown_ssc313e_openipc_defconfig
index f0a420e3..6df1464a 100644
--- a/br-ext-chip-sigmastar/configs/unknown_unknown_ssc313e_openipc_defconfig
+++ b/br-ext-chip-sigmastar/configs/unknown_unknown_ssc313e_openipc_defconfig
@@ -1,6 +1,6 @@
 
 # OpenIPC configuration
 BR2_TOOLCHAIN_BUILDROOT_VENDOR="openipc"
-BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.22.1"
+BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.22.2"
 BR2_TARGET_GENERIC_HOSTNAME="ipcam"
 BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches"
diff --git a/br-ext-chip-sigmastar/configs/unknown_unknown_ssc335_openipc_defconfig b/br-ext-chip-sigmastar/configs/unknown_unknown_ssc335_openipc_defconfig
index f0a420e3..bc03716b 100644
--- a/br-ext-chip-sigmastar/configs/unknown_unknown_ssc335_openipc_defconfig
+++ b/br-ext-chip-sigmastar/configs/unknown_unknown_ssc335_openipc_defconfig
@@ -1,6 +1,69 @@
+# Architecture
+BR2_arm=y
+BR2_cortex_a7=y
+BR2_ARM_EABI=y
+BR2_ARM_FPU_NEON_VFPV3=y
+BR2_ARM_INSTRUCTIONS_THUMB2=y
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="4.9.84"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
+
+# Toolchain
+BR2_GCC_VERSION_7_X=y
+# BR2_TOOLCHAIN_USES_UCLIBC is not set
+# BR2_TOOLCHAIN_BUILDROOT_UCLIBC is not set
+# BR2_TOOLCHAIN_BUILDROOT_LIBC="uclibc"
+BR2_TOOLCHAIN_USES_MUSL=y
+BR2_TOOLCHAIN_BUILDROOT_MUSL=y
+BR2_TOOLCHAIN_BUILDROOT_LIBC="musl"
+BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
+BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.84"
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_SIGMASTAR_PATH)/board/infinity6b0/kernel/ssc335.generic.config"
+BR2_LINUX_KERNEL_UIMAGE=y
+BR2_LINUX_KERNEL_XZ=y
+BR2_LINUX_KERNEL_EXT_HISI_PATCHER=y
+BR2_LINUX_KERNEL_EXT_HISI_PATCHER_LIST="$(BR2_EXTERNAL_SIGMASTAR_PATH)/board/infinity6b0/kernel/patches/ $(BR2_EXTERNAL_SIGMASTAR_PATH)/board/infinity6b0/kernel/overlay"
+
+# Filesystem
+# BR2_TARGET_TZ_INFO is not set
+BR2_TARGET_ROOTFS_SQUASHFS=y
+BR2_TARGET_ROOTFS_SQUASHFS4_XZ=y
+BR2_ROOTFS_OVERLAY="$(TOPDIR)/../general/overlay"
 
 # OpenIPC configuration
 BR2_TOOLCHAIN_BUILDROOT_VENDOR="openipc"
-BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.22.1"
+BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.24.1"
 BR2_TARGET_GENERIC_HOSTNAME="ipcam"
 BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches"
+
+# Packages
+BR2_PACKAGE_BUSYBOX_CONFIG="$(TOPDIR)/../general/package/configs/busybox.config"
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_FWPRINTENV_NG=y
+# BR2_PACKAGE_HISILICON_OSDRV_SSC335 is not set
+BR2_PACKAGE_IPCTOOL=y
+BR2_PACKAGE_JSON_C=y
+BR2_PACKAGE_LAME=y
+BR2_PACKAGE_LIBEVENT_MINI=y
+# BR2_PACKAGE_MAJESTIC is not set
+BR2_PACKAGE_MINI_SNMPD=y
+
+# Unused
+# BR2_SHARED_STATIC_LIBS is not set
+# BR2_PACKAGE_JPEG_TURBO is not set
+# BR2_PACKAGE_MINIHTTP is not set
+# BR2_PACKAGE_MXML is not set
+# BR2_PACKAGE_SSHPASS is not set
+# BR2_PACKAGE_RTL8188EU is not set
+
+# Experimental
+BR2_PER_PACKAGE_DIRECTORIES=y
+BR2_PACKAGE_WIRELESS_TOOLS=y
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_NL80211=y
diff --git a/br-ext-chip-sigmastar/package/ipctool/ipctool.mk b/br-ext-chip-sigmastar/package/ipctool/ipctool.mk
index 3d6c6eb0..47209992 100644
--- a/br-ext-chip-sigmastar/package/ipctool/ipctool.mk
+++ b/br-ext-chip-sigmastar/package/ipctool/ipctool.mk
@@ -1,10 +1,10 @@
 ################################################################################
 #
-# ipctool
+# ipctool | updated 2021.04.23
 #
 ################################################################################
 
-IPCTOOL_VERSION = 04b2eec1f6d2cbb053548257836e6a7bbebf9d93
+IPCTOOL_VERSION = 56fa840899fc024a4e3c5126a5792f4498dca7d2
 IPCTOOL_SITE = $(call github,openipc,ipctool,$(IPCTOOL_VERSION))
 IPCTOOL_LICENSE = MIT
 IPCTOOL_LICENSE_FILES = LICENSE
diff --git a/br-ext-chip-xiongmai/package/ipctool/ipctool.mk b/br-ext-chip-xiongmai/package/ipctool/ipctool.mk
index 06fff403..47209992 100644
--- a/br-ext-chip-xiongmai/package/ipctool/ipctool.mk
+++ b/br-ext-chip-xiongmai/package/ipctool/ipctool.mk
@@ -1,10 +1,10 @@
 ################################################################################
 #
-# ipctool
+# ipctool | updated 2021.04.23
 #
 ################################################################################
 
-IPCTOOL_VERSION = 7e523a84b054a122245039b7b32e67bf0995ba8f
+IPCTOOL_VERSION = 56fa840899fc024a4e3c5126a5792f4498dca7d2
 IPCTOOL_SITE = $(call github,openipc,ipctool,$(IPCTOOL_VERSION))
 IPCTOOL_LICENSE = MIT
 IPCTOOL_LICENSE_FILES = LICENSE