diff --git a/scripts/build_fw.sh b/scripts/build_fw.sh
index 9bc1136..9aa706f 100755
--- a/scripts/build_fw.sh
+++ b/scripts/build_fw.sh
@@ -16,19 +16,28 @@
 #   along with this program; if not, write to the Free Software
 #   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+if [ ! -d ~/MMDVM_HS ] ; then
+    mkdir ~/MMDVM_HS
+fi
+
 echo "******************************************************"
 echo "********* Cleaning objects and updating code *********"
 echo "******************************************************"
 cd ~/MMDVM_HS/
 make clean
-git pull
+rm -rf bin/*.bin bin/MD5SUMS.txt
+
+# Download STM32F10X_Lib (only for binary tools)
+if [ ! -d "./STM32F10X_Lib/utils" ]; then
+  git clone https://github.com/juribeparada/STM32F10X_Lib
+fi
 
 # Building ZUMspot Libre Kit
 echo "*******************************************************"
 echo "********* Building ZUMspot Libre Kit firmware *********"
 echo "*******************************************************"
 cp ~/MMDVM_HS/configs/ZUMspot_Libre.h ~/MMDVM_HS/Config.h
-make -j4 bl
+make -j5 bl
 mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/zumspot_libre_fw.bin
 make clean
 
@@ -37,7 +46,7 @@ echo "*************************************************"
 echo "********* Building ZUMspot RPi firmware *********"
 echo "*************************************************"
 cp ~/MMDVM_HS/configs/ZUMspot_RPi.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/zumspot_rpi_fw.bin
 make clean
 
@@ -46,8 +55,8 @@ echo "*************************************************"
 echo "********* Building ZUMspot USB firmware *********"
 echo "*************************************************"
 cp ~/MMDVM_HS/configs/ZUMspot_USB.h ~/MMDVM_HS/Config.h
-make -j4 bl
-mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/zumspot_usb_fw.bin
+make -j5 bl
+mv ~/MMDVM_HS/bin/mmdvm_f1bl.hex ~/MMDVM_HS/bin/zumspot_usb_fw.hex
 make clean
 
 # Building ZUMspot Duplex
@@ -55,7 +64,7 @@ echo "****************************************************"
 echo "********* Building ZUMspot Duplex firmware *********"
 echo "****************************************************"
 cp ~/MMDVM_HS/configs/ZUMspot_duplex.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/zumspot_duplex_fw.bin
 make clean
 
@@ -64,7 +73,7 @@ echo "******************************************************"
 echo "********* Building ZUMspot Dualband firmware *********"
 echo "******************************************************"
 cp ~/MMDVM_HS/configs/ZUMspot_dualband.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/zumspot_dualband_fw.bin
 make clean
 
@@ -73,7 +82,7 @@ echo "**************************************************"
 echo "********* Building MMDVM_HS_Hat firmware *********"
 echo "**************************************************"
 cp ~/MMDVM_HS/configs/MMDVM_HS_Hat.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/mmdvm_hs_hat_fw.bin
 make clean
 
@@ -82,7 +91,7 @@ echo "********************************************************************"
 echo "********* Building MMDVM_HS_Hat (12.288 MHz TCXO) firmware *********"
 echo "********************************************************************"
 cp ~/MMDVM_HS/configs/MMDVM_HS_Hat-12mhz.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/mmdvm_hs_hat_fw-12mhz.bin
 make clean
 
@@ -91,7 +100,7 @@ echo "*******************************************************"
 echo "********* Building MMDVM_HS_Dual_Hat firmware *********"
 echo "*******************************************************"
 cp ~/MMDVM_HS/configs/MMDVM_HS_Dual_Hat.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/mmdvm_hs_dual_hat_fw.bin
 make clean
 
@@ -100,7 +109,7 @@ echo "*************************************************************************"
 echo "********* Building MMDVM_HS_Dual_Hat (12.288 MHz TCXO) firmware *********"
 echo "*************************************************************************"
 cp ~/MMDVM_HS/configs/MMDVM_HS_Dual_Hat-12mhz.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/mmdvm_hs_dual_hat_fw-12mhz.bin
 make clean
 
@@ -109,7 +118,7 @@ echo "**************************************************"
 echo "********* Building Nano hotSPOT firmware *********"
 echo "**************************************************"
 cp ~/MMDVM_HS/configs/Nano_hotSPOT.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/nano_hotspot_fw.bin
 make clean
 
@@ -118,7 +127,7 @@ echo "************************************************"
 echo "********* Building NanoDV NPi firmware *********"
 echo "************************************************"
 cp ~/MMDVM_HS/configs/NanoDV_NPi.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/nanodv_npi_fw.bin
 make clean
 
@@ -127,7 +136,7 @@ echo "************************************************"
 echo "********* Building NanoDV USB firmware *********"
 echo "************************************************"
 cp ~/MMDVM_HS/configs/NanoDV_USB.h ~/MMDVM_HS/Config.h
-make -j4 bl
+make -j5 bl
 mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/nanodv_usb_fw.bin
 make clean
 
@@ -136,7 +145,7 @@ echo "***************************************************"
 echo "********* Building D2RG MMDVM_HS firmware *********"
 echo "***************************************************"
 cp ~/MMDVM_HS/configs/D2RG_MMDVM_HS.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/d2rg_mmdvm_hs.bin
 make clean
 
@@ -145,7 +154,7 @@ echo "**********************************************************"
 echo "********* Building Generic Simplex GPIO firmware *********"
 echo "**********************************************************"
 cp ~/MMDVM_HS/configs/generic_gpio.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/generic_gpio_fw.bin
 make clean
 
@@ -154,7 +163,7 @@ echo "*********************************************************"
 echo "********* Building Generic Duplex GPIO firmware *********"
 echo "*********************************************************"
 cp ~/MMDVM_HS/configs/generic_duplex_gpio.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/generic_duplex_gpio_fw.bin
 make clean
 
@@ -163,7 +172,7 @@ echo "********************************************************"
 echo "********* Building Generic Duplex USB firmware *********"
 echo "********************************************************"
 cp ~/MMDVM_HS/configs/generic_duplex_usb.h ~/MMDVM_HS/Config.h
-make -j4 bl
+make -j5 bl
 mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/generic_duplex_usb_fw.bin
 make clean
 
@@ -172,7 +181,7 @@ echo "******************************************************"
 echo "********* Building SkyBridge RPi HS firmware *********"
 echo "******************************************************"
 cp ~/MMDVM_HS/configs/SkyBridge_RPi.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/skybridge_rpi_fw.bin
 make clean
 
@@ -181,7 +190,7 @@ echo "*************************************************"
 echo "********* Building LoneStar USB firmware *********"
 echo "*************************************************"
 cp ~/MMDVM_HS/configs/LoneStar_USB.h ~/MMDVM_HS/Config.h
-make -j4 bl
+make -j5 bl
 mv ~/MMDVM_HS/bin/mmdvm_f1bl.bin ~/MMDVM_HS/bin/lonestar_usb_fw.bin
 make clean
 
@@ -190,9 +199,15 @@ echo "********************************************************************"
 echo "********* Building DVMEGA EuroNode HS_HAT HS GPIO firmware *********"
 echo "********************************************************************"
 cp ~/MMDVM_HS/configs/DVMega_Euronode.h ~/MMDVM_HS/Config.h
-make -j4
+make -j5
 mv ~/MMDVM_HS/bin/mmdvm_f1.bin ~/MMDVM_HS/bin/euronode_pi_fw.bin
 make clean
 
-# put default config back:
+# put default config back.
 cp ~/MMDVM_HS/configs/ZUMspot_Libre.h ~/MMDVM_HS/Config.h
+
+cd ~/MMDVM_HS/bin
+md5sum $(ls *.bin *.hex 2>/dev/null) > MD5SUMS.txt
+git add .
+git commit  -a -m 'Updated FW bins'
+#git push