diff --git a/base_external/Config.in b/base_external/Config.in
index e69de29..d759111 100644
--- a/base_external/Config.in
+++ b/base_external/Config.in
@@ -0,0 +1 @@
+source "$BR2_EXTERNAL_assignment_base_PATH/package/aesd-assignments/Config.in"
diff --git a/base_external/configs/aesd_rpi_defconfig b/base_external/configs/aesd_rpi_defconfig
index 67b0f1b..9a998f3 100644
--- a/base_external/configs/aesd_rpi_defconfig
+++ b/base_external/configs/aesd_rpi_defconfig
@@ -4,9 +4,10 @@ BR2_ARM_FPU_NEON_VFPV4=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_OVERLAY="../base_external/rootfs_overlay/"
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3/post-build.sh"
-BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi3/post-image.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi3/post-image.sh ../base_external/post-image.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay --add-SPI"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,5eeff139ea9135db6e01a58ef613338f1d0899d8)/linux-5eeff139ea9135db6e01a58ef613338f1d0899d8.tar.gz"
@@ -14,7 +15,9 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2710-rpi-3-b bcm2710-rpi-3-b-plus bcm2710-rpi-cm3"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_PACKAGE_SPIDEV_TEST=y
 BR2_PACKAGE_RPI_FIRMWARE=y
+BR2_PACKAGE_SPI_TOOLS=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
diff --git a/base_external/external.desc b/base_external/external.desc
index 5ba2552..e593238 100644
--- a/base_external/external.desc
+++ b/base_external/external.desc
@@ -1,2 +1,2 @@
 name: assignment_base
-description: Base customization for assignment
+description: Base customization for assignment
\ No newline at end of file
diff --git a/base_external/external.mk b/base_external/external.mk
index 7a8c21f..5f05dcb 100644
--- a/base_external/external.mk
+++ b/base_external/external.mk
@@ -1 +1 @@
-include $(sort $(wildcard $(BR2_EXTERNAL_assignment_base_PATH)/package/*/*.mk))
+include $(sort $(wildcard $(BR2_EXTERNAL_assignment_base_PATH)/package/*/*.mk))
\ No newline at end of file
diff --git a/base_external/post-image.sh b/base_external/post-image.sh
new file mode 100755
index 0000000..4a33d97
--- /dev/null
+++ b/base_external/post-image.sh
@@ -0,0 +1,51 @@
+#!/bin/bash
+
+set -e
+
+#BOARD_DIR="$(dirname $0)"
+BOARD_DIR="../buildroot/board/raspberrypi3"
+BOARD_NAME="$(basename ${BOARD_DIR})"
+GENIMAGE_CFG="${BOARD_DIR}/genimage-${BOARD_NAME}.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+
+for arg in "$@"
+do
+	case "${arg}" in
+		
+		# SPI/I2C
+		--add-SPI)
+		if ! grep -qE '^dtparam=spi=on' "${BINARIES_DIR}/rpi-firmware/config.txt"; then
+			cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/config.txt"
+# enable SPi
+dtparam=spi=on
+__EOF__
+		fi
+		;;
+		
+		--gpu_mem_256=*|--gpu_mem_512=*|--gpu_mem_1024=*)
+		# Set GPU memory
+		gpu_mem="${arg:2}"
+		sed -e "/^${gpu_mem%=*}=/s,=.*,=${gpu_mem##*=}," -i "${BINARIES_DIR}/rpi-firmware/config.txt"
+		;;
+	esac
+
+done
+
+# Pass an empty rootpath. genimage makes a full copy of the given rootpath to
+# ${GENIMAGE_TMP}/root so passing TARGET_DIR would be a waste of time and disk
+# space. We don't rely on genimage to build the rootfs image, just to insert a
+# pre-built one in the disk image.
+
+trap 'rm -rf "${ROOTPATH_TMP}"' EXIT
+ROOTPATH_TMP="$(mktemp -d)"
+
+rm -rf "${GENIMAGE_TMP}"
+
+genimage \
+	--rootpath "${ROOTPATH_TMP}"   \
+	--tmppath "${GENIMAGE_TMP}"    \
+	--inputpath "${BINARIES_DIR}"  \
+	--outputpath "${BINARIES_DIR}" \
+	--config "${GENIMAGE_CFG}"
+
+exit $?
\ No newline at end of file
diff --git a/base_external/rootfs_overlay/etc/init.d/S99lddmodules b/base_external/rootfs_overlay/etc/init.d/S99lddmodules
new file mode 100755
index 0000000..27d7e45
--- /dev/null
+++ b/base_external/rootfs_overlay/etc/init.d/S99lddmodules
@@ -0,0 +1,19 @@
+#! /bin/sh
+
+
+case "$1" in
+start)
+echo "Starting init script for I2C module"
+modprobe spidev
+modprobe spi-bcm2835
+;;
+stop)
+echo "Removing user modules"
+rmmod spi-bcm2835
+rmmo spidev
+;;
+*)
+echo "Usage: $0 {start|stop}"
+exit 1
+esac
+exit 0
diff --git a/clean.sh b/clean.sh
new file mode 100755
index 0000000..d1ef9d9
--- /dev/null
+++ b/clean.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+#Script to clean buildroot configuration.
+#Author: Siddhant Jajoo.
+
+
+make -C buildroot distclean
+
diff --git a/screenshots/spi_defconfig.PNG b/screenshots/spi_defconfig.PNG
new file mode 100644
index 0000000..e697c82
Binary files /dev/null and b/screenshots/spi_defconfig.PNG differ
diff --git a/screenshots/spi_make_menuconfig.PNG b/screenshots/spi_make_menuconfig.PNG
new file mode 100644
index 0000000..cc7d71f
Binary files /dev/null and b/screenshots/spi_make_menuconfig.PNG differ