diff --git a/misc/rootfs/opt/Bela/bela_flash_emmc.sh b/misc/rootfs/opt/Bela/bela_flash_emmc.sh
index 4686a22..a525736 100755
--- a/misc/rootfs/opt/Bela/bela_flash_emmc.sh
+++ b/misc/rootfs/opt/Bela/bela_flash_emmc.sh
@@ -58,6 +58,7 @@ mkdir -p /mnt/root/media /mnt/root/mnt /mnt/root/proc /mnt/root/run/ /mnt/root/s
 cp -a /opt/Bela/fstab-emmc /mnt/root/etc/fstab
 echo "/dev/mmcblk1" > /mnt/root/opt/Bela/rootfs_dev
 rm /mnt/root/etc/systemd/system/default.target.wants/bela_flash_emmc.service || true
+rm /mnt/root/etc/cpsw* || true # reset mac address
 sync
 
 umount /mnt/emmc_boot
diff --git a/misc/rootfs/opt/Bela/bela_gadget.sh b/misc/rootfs/opt/Bela/bela_gadget.sh
index 91ba36e..9faff4c 100755
--- a/misc/rootfs/opt/Bela/bela_gadget.sh
+++ b/misc/rootfs/opt/Bela/bela_gadget.sh
@@ -48,6 +48,12 @@ echo 1 > os_desc/use
 echo 0xbc > os_desc/b_vendor_code
 echo MSFT100 > os_desc/qw_sign
 
+/opt/Bela/bela_mac.sh || true
+cat /etc/cpsw_2_mac > functions/rndis.usb0/host_addr || true
+cat /etc/cpsw_1_mac > functions/rndis.usb0/dev_addr || true
+cat /etc/cpsw_4_mac > functions/ecm.usb0/host_addr || true
+cat /etc/cpsw_5_mac > functions/ecm.usb0/dev_addr || true
+
 mkdir -p functions/rndis.usb0/os_desc/interface.rndis
 echo RNDIS > functions/rndis.usb0/os_desc/interface.rndis/compatible_id
 echo 5162001 > functions/rndis.usb0/os_desc/interface.rndis/sub_compatible_id
diff --git a/misc/rootfs/opt/Bela/bela_mac.sh b/misc/rootfs/opt/Bela/bela_mac.sh
new file mode 100755
index 0000000..a8dd326
--- /dev/null
+++ b/misc/rootfs/opt/Bela/bela_mac.sh
@@ -0,0 +1,229 @@
+#!/bin/sh -e
+#
+# Copyright (c) 2013-2017 Robert Nelson <robertcnelson@gmail.com>
+# Copyright (c) 2018 Liam Donovan <liam@bela.io>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+#cpsw_0_mac = eth0 - wlan0 (in eeprom)
+#cpsw_1_mac = usb0 (BeagleBone Side) (in eeprom)
+#cpsw_2_mac = usb0 (USB host, pc side) ((cpsw_0_mac + cpsw_2_mac) /2 )
+#cpsw_3_mac = wl18xx (AP) (cpsw_0_mac + 3)
+#cpsw_4_mac = usb1 (BeagleBone Side)
+#cpsw_5_mac = usb1 (USB host, pc side)
+
+mac_address="/proc/device-tree/ocp/ethernet@4a100000/slave@4a100200/mac-address"
+if [ -f ${mac_address} ] && [ -f /usr/bin/hexdump ] ; then
+	cpsw_0_mac=$(hexdump -v -e '1/1 "%02X" ":"' ${mac_address} | sed 's/.$//')
+	cpsw_0_mac=$(echo $cpsw_0_mac | cut -c 5-17 | sed s/./BE:1A/1)
+
+	#Some devices are showing a blank cpsw_0_mac [00:00:00:00:00:00], let's fix that up...
+	if [ "x${cpsw_0_mac}" = "xBE:1A:00:00:00:00" ] ; then
+		cpsw_0_mac="BE:1A:8C:A2:ED:68"
+	fi
+else
+	#todo: generate random mac... (this is a development tre board in the lab...)
+	cpsw_0_mac="BE:1A:8C:A2:ED:68"
+fi
+
+unset use_cached_cpsw_mac
+if [ -f /etc/cpsw_0_mac ] ; then
+	unset test_cpsw_0_mac
+	test_cpsw_0_mac=$(cat /etc/cpsw_0_mac)
+	if [ "x${cpsw_0_mac}" = "x${test_cpsw_0_mac}" ] ; then
+		use_cached_cpsw_mac="true"
+	else
+		echo "${cpsw_0_mac}" > /etc/cpsw_0_mac || true
+	fi
+else
+	echo "${cpsw_0_mac}" > /etc/cpsw_0_mac || true
+fi
+
+if [ "x${use_cached_cpsw_mac}" = "xtrue" ] && [ -f /etc/cpsw_1_mac ] ; then
+	cpsw_1_mac=$(cat /etc/cpsw_1_mac)
+else
+	mac_address="/proc/device-tree/ocp/ethernet@4a100000/slave@4a100300/mac-address"
+	if [ -f ${mac_address} ] && [ -f /usr/bin/hexdump ] ; then
+		cpsw_1_mac=$(hexdump -v -e '1/1 "%02X" ":"' ${mac_address} | sed 's/.$//')
+		cpsw_1_mac=$(echo $cpsw_1_mac | cut -c 5-17 | sed s/./BE:1A/1)
+
+		#Some devices are showing a blank cpsw_1_mac [00:00:00:00:00:00], let's fix that up...
+		if [ "x${cpsw_1_mac}" = "xBE:1A:00:00:00:00" ] ; then
+			if [ -f /usr/bin/bc ] ; then
+				mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-14)
+
+				cpsw_0_6=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}')
+				#bc cuts off leading zero's, we need ten/ones value
+				cpsw_res=$(echo "obase=16;ibase=16;$cpsw_0_6 + 102" | bc)
+
+				cpsw_1_mac=${mac_0_prefix}:$(echo ${cpsw_res} | cut -c 2-3)
+			else
+				cpsw_1_mac="BE:1A:8C:A2:ED:70"
+			fi
+		fi
+		echo "${cpsw_1_mac}" > /etc/cpsw_1_mac || true
+	else
+		#todo: generate random mac...
+		cpsw_1_mac="BE:1A:8C:A2:ED:70"
+		echo "${cpsw_1_mac}" > /etc/cpsw_1_mac || true
+	fi
+fi
+
+if [ "x${use_cached_cpsw_mac}" = "xtrue" ] && [ -f /etc/cpsw_2_mac ] ; then
+	cpsw_2_mac=$(cat /etc/cpsw_2_mac)
+else
+	if [ -f /usr/bin/bc ] ; then
+		mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-14)
+
+		cpsw_0_6=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}')
+		cpsw_1_6=$(echo ${cpsw_1_mac} | awk -F ':' '{print $6}')
+
+		cpsw_add=$(echo "obase=16;ibase=16;$cpsw_0_6 + $cpsw_1_6" | bc)
+		cpsw_div=$(echo "obase=16;ibase=16;$cpsw_add / 2" | bc)
+		#bc cuts off leading zero's, we need ten/ones value
+		cpsw_res=$(echo "obase=16;ibase=16;$cpsw_div + 100" | bc)
+
+		cpsw_2_mac=${mac_0_prefix}:$(echo ${cpsw_res} | cut -c 2-3)
+		echo "${log} uncached cpsw_2_mac: [${cpsw_2_mac}]"
+	else
+		cpsw_0_last=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}' | cut -c 2)
+		cpsw_1_last=$(echo ${cpsw_1_mac} | awk -F ':' '{print $6}' | cut -c 2)
+		mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-16)
+		mac_1_prefix=$(echo ${cpsw_1_mac} | cut -c 1-16)
+		#if cpsw_0_mac is even, add 1
+		case "x${cpsw_0_last}" in
+		x0)
+			cpsw_2_mac="${mac_0_prefix}1"
+			;;
+		x2)
+			cpsw_2_mac="${mac_0_prefix}3"
+			;;
+		x4)
+			cpsw_2_mac="${mac_0_prefix}5"
+			;;
+		x6)
+			cpsw_2_mac="${mac_0_prefix}7"
+			;;
+		x8)
+			cpsw_2_mac="${mac_0_prefix}9"
+			;;
+		xA)
+			cpsw_2_mac="${mac_0_prefix}B"
+			;;
+		xC)
+			cpsw_2_mac="${mac_0_prefix}D"
+			;;
+		xE)
+			cpsw_2_mac="${mac_0_prefix}F"
+			;;
+		*)
+			#else, subtract 1 from cpsw_1_mac
+			case "x${cpsw_1_last}" in
+			xF)
+				cpsw_2_mac="${mac_1_prefix}E"
+				;;
+			xD)
+				cpsw_2_mac="${mac_1_prefix}C"
+				;;
+			xB)
+				cpsw_2_mac="${mac_1_prefix}A"
+				;;
+			x9)
+				cpsw_2_mac="${mac_1_prefix}8"
+				;;
+			x7)
+				cpsw_2_mac="${mac_1_prefix}6"
+				;;
+			x5)
+				cpsw_2_mac="${mac_1_prefix}4"
+				;;
+			x3)
+				cpsw_2_mac="${mac_1_prefix}2"
+				;;
+			x1)
+				cpsw_2_mac="${mac_1_prefix}0"
+				;;
+			*)
+				#todo: generate random mac...
+				cpsw_2_mac="BE:1A:8C:A2:ED:6A"
+				;;
+			esac
+			;;
+		esac
+	fi
+	echo "${cpsw_2_mac}" > /etc/cpsw_2_mac || true
+fi
+
+if [ "x${use_cached_cpsw_mac}" = "xtrue" ] && [ -f /etc/cpsw_3_mac ] ; then
+	cpsw_3_mac=$(cat /etc/cpsw_3_mac)
+else
+	if [ -f /usr/bin/bc ] ; then
+		mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-14)
+
+		cpsw_0_6=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}')
+		#bc cuts off leading zero's, we need ten/ones value
+		cpsw_res=$(echo "obase=16;ibase=16;$cpsw_0_6 + 103" | bc)
+
+		cpsw_3_mac=${mac_0_prefix}:$(echo ${cpsw_res} | cut -c 2-3)
+	else
+		cpsw_3_mac="BE:1A:8C:A2:ED:71"
+	fi
+	echo "${cpsw_3_mac}" > /etc/cpsw_3_mac || true
+fi
+
+if [ "x${use_cached_cpsw_mac}" = "xtrue" ] && [ -f /etc/cpsw_4_mac ] ; then
+	cpsw_4_mac=$(cat /etc/cpsw_4_mac)
+else
+	if [ -f /usr/bin/bc ] ; then
+		mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-14)
+
+		cpsw_0_6=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}')
+		#bc cuts off leading zero's, we need ten/ones value
+		cpsw_res=$(echo "obase=16;ibase=16;$cpsw_0_6 + 104" | bc)
+
+		cpsw_4_mac=${mac_0_prefix}:$(echo ${cpsw_res} | cut -c 2-3)
+	else
+		cpsw_4_mac="BE:1A:8C:A2:ED:72"
+	fi
+	echo "${cpsw_4_mac}" > /etc/cpsw_4_mac || true
+fi
+
+if [ "x${use_cached_cpsw_mac}" = "xtrue" ] && [ -f /etc/cpsw_5_mac ] ; then
+	cpsw_5_mac=$(cat /etc/cpsw_5_mac)
+else
+	if [ -f /usr/bin/bc ] ; then
+		mac_0_prefix=$(echo ${cpsw_0_mac} | cut -c 1-14)
+
+		cpsw_0_6=$(echo ${cpsw_0_mac} | awk -F ':' '{print $6}')
+		#bc cuts off leading zero's, we need ten/ones value
+		cpsw_res=$(echo "obase=16;ibase=16;$cpsw_0_6 + 105" | bc)
+
+		cpsw_5_mac=${mac_0_prefix}:$(echo ${cpsw_res} | cut -c 2-3)
+	else
+		cpsw_5_mac="BE:1A:8C:A2:ED:73"
+	fi
+	echo "${cpsw_5_mac}" > /etc/cpsw_5_mac || true
+fi
+
+echo "${log} cpsw_0_mac: [${cpsw_0_mac}]"
+echo "${log} cpsw_1_mac: [${cpsw_1_mac}]"
+echo "${log} cpsw_2_mac: [${cpsw_2_mac}]"
+echo "${log} cpsw_3_mac: [${cpsw_3_mac}]"
+echo "${log} cpsw_4_mac: [${cpsw_4_mac}]"
+echo "${log} cpsw_5_mac: [${cpsw_5_mac}]"
diff --git a/packages.txt b/packages.txt
index 91f7a9c..b2288f0 100644
--- a/packages.txt
+++ b/packages.txt
@@ -54,3 +54,4 @@ glibc-doc
 libfftw3-dev
 hostapd
 strace
+bc