diff --git a/install.sh b/install.sh
index 2773417b..13d18417 100755
--- a/install.sh
+++ b/install.sh
@@ -71,10 +71,25 @@ sudo systemctl enable rpitx
 
 if [ "$1" = "u" ]; then
 
-  sed -i 's/console=serial0,115200//g' /boot/cmdline.txt
+  sudo sed -i 's/console=serial0,115200//g' /boot/cmdline.txt
+  
+  sudo sed -i 's/#dtparam=i2c_arm=on/dtparam=i2c_arm=on/g' /boot/config.txt
   
   sudo echo "\ndtoverlay=i2c-gpio,bus=3,i2c_gpio_delay_us=1,i2c_gpio_sda=23,i2c_gpio_scl=24\ndtoverlay=pi3-miniuart-bt" >> /boot/config.txt
-
+  
+  if [[ $(grep 'dtoverlay=i2c-gpio,bus=3,i2c_gpio_delay_us=1,i2c_gpio_sda=23,i2c_gpio_scl=24' /boot/config.txt) ]]; then
+    echo "adding dtoverlay=i2c-gpio to /boot/config.txt"
+    sudo echo "\ndtoverlay=i2c-gpio,bus=3,i2c_gpio_delay_us=1,i2c_gpio_sda=23,i2c_gpio_scl=24" >> /boot/config.txt
+  else
+    echo "dtoverlay=i2c-gpio already in /boot/config.txt"
+  fi
+
+  if [[ $(grep 'dtoverlay=pi3-miniuart-bt' /boot/config.txt) ]]; then
+    echo "adding dtoverlay=pi3-miniuart-bt to /boot/config.txt"
+    sudo echo "\ndtoverlay=pi3-miniuart-bt" >> /boot/config.txt
+  else
+    echo "dtoverlay=pi3-miniuart-bt already in /boot/config.txt"
+  fi
 fi
 
 echo "You need to reboot to complete the installation\n"