diff --git a/recipes-extended/um-service-cfg/config/ports b/recipes-extended/um-service-cfg/config/ports
deleted file mode 100644
index e69de29..0000000
diff --git a/recipes-extended/um-service-cfg/config/ports-v1 b/recipes-extended/um-service-cfg/config/ports-v1
new file mode 100644
index 0000000..b23fac2
--- /dev/null
+++ b/recipes-extended/um-service-cfg/config/ports-v1
@@ -0,0 +1,6 @@
+USER_MODULE_kline_port="2202"
+USER_MODULE_lin_port="2200"
+USER_MODULE_uart_port="2204"
+USER_MODULE_cannellonie_port_remote="20000"
+USER_MODULE_cannellonie_port_local="20000"
+USER_MODULE_remote_gpio_port="6666"
diff --git a/recipes-extended/um-service-cfg/config/ports-v2 b/recipes-extended/um-service-cfg/config/ports-v2
new file mode 100644
index 0000000..761e02e
--- /dev/null
+++ b/recipes-extended/um-service-cfg/config/ports-v2
@@ -0,0 +1,7 @@
+USER_MODULE_at_cmd_handler_port="7000"
+USER_MODULE_kline_port="7050"
+USER_MODULE_lin_port="7060"
+USER_MODULE_uart_port="7040"
+USER_MODULE_cannellonie_port_remote="7010 7011"
+USER_MODULE_cannellonie_port_local="7010 7011"
+USER_MODULE_remote_gpio_port="7020"
diff --git a/recipes-extended/um-service-cfg/files/um-service-config.sh b/recipes-extended/um-service-cfg/files/um-service-config.sh
index 66d29d1..8d63968 100644
--- a/recipes-extended/um-service-cfg/files/um-service-config.sh
+++ b/recipes-extended/um-service-cfg/files/um-service-config.sh
@@ -3,7 +3,8 @@
 UM_CONFIG_PATH=/etc/user-module
 UM_CONFIG_FILE=network.conf
 UM_CONFIG=$UM_CONFIG_PATH/$UM_CONFIG_FILE
-UM_PORTS=$UM_CONFIG_PATH/ports
+UM_PORTS_V1=$UM_CONFIG_PATH/ports-v1
+UM_PORTS_V2=$UM_CONFIG_PATH/ports-v2
 
 UM_DTS_NODE=/proc/device-tree/user_module
 
@@ -21,7 +22,16 @@ for f in $UM_DTS_NODE/*; do
     echo "USER_MODULE_${f##*/}=\"`cat $f | tr -d '\0' `\"" | sed -E "s/,|-/_/g"  >> $UM_CONFIG
 done
 
-cat $UM_PORTS >> $UM_CONFIG
+source $UM_CONFIG
+
+# Decide which config to load depending on the sw revision
+if `nc -z $USER_MODULE_ipv4_addr 7000` ; then
+  echo "New UM software detected"
+  cat $UM_PORTS_V2 >> $UM_CONFIG
+else
+  echo "Old UM software detected"
+  cat $UM_PORTS_V1 >> $UM_CONFIG
+fi
 
 # source all fetched informations
 source $UM_CONFIG
diff --git a/recipes-extended/um-service-cfg/um-service-cfg_0.0.1.bb b/recipes-extended/um-service-cfg/um-service-cfg_0.0.1.bb
index a572f79..56b4a95 100644
--- a/recipes-extended/um-service-cfg/um-service-cfg_0.0.1.bb
+++ b/recipes-extended/um-service-cfg/um-service-cfg_0.0.1.bb
@@ -5,37 +5,27 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
 FILESEXTRAPATHS_prepend := "${THISDIR}/config:"
 
+ALTERNATIVE_PRIORITY[netcat] = "100"
+RDEPENDS_${PN} = "netcat"
+
 SRC_URI = " \
-			file://um-service-config.service \
-			file://um-service-config.sh \
-			file://user-module.target \
+            file://um-service-config.service \
+            file://um-service-config.sh \
+            file://user-module.target \
             file://um-rgpio-config.sh \
             file://um-rgpio-config.service \
-            file://ports \
-			"
+            file://ports-v1 \
+            file://ports-v2 \
+          "
 
 FILES_${PN} = "${systemd_unitdir}/system ${bindir} /etc/user-module"
 
-SYSTEMD_SERVICE_${PN} =" \ 
+SYSTEMD_SERVICE_${PN} =" \
                             um-service-config.service \
                             um-rgpio-config.service \
                             user-module.target \
                         "
 
-do_install_append() {
-# port config
-    echo "USER_MODULE_kline_port=\"2202\"" >> ${WORKDIR}/ports
-    echo "USER_MODULE_lin_port=\"2200\"" >> ${WORKDIR}/ports
-    echo "USER_MODULE_uart_port=\"2204\"" >> ${WORKDIR}/ports
-    echo "USER_MODULE_cannellonie_port_remote=\"20000\"" >> ${WORKDIR}/ports
-    echo "USER_MODULE_cannellonie_port_local=\"20000\"" >> ${WORKDIR}/ports
-    echo "USER_MODULE_remote_gpio_port=\"6666\"" >> ${WORKDIR}/ports
-
-    install -d ${D}/etc/user-module
-    install -m 644 ${WORKDIR}/ports ${D}/etc/user-module/ports
-}
-
-
 do_install() {
 
     install -d ${D}${systemd_unitdir}/system
@@ -49,10 +39,14 @@ do_install() {
 
     install -d ${D}${bindir}
     install -m 744 ${WORKDIR}/um-service-config.sh ${D}${bindir}/um-service-config
-    
+
     install -d ${D}${systemd_unitdir}/system
     install -m 644 ${WORKDIR}/um-rgpio-config.service ${D}${systemd_unitdir}/system/
     install -d ${D}${bindir}
     install -m 744 ${WORKDIR}/um-rgpio-config.sh ${D}${bindir}/um-rgpio-config
+
+    install -d ${D}/etc/user-module
+    install -m 644 ${WORKDIR}/ports-v1 ${D}/etc/user-module/ports-v1
+    install -m 644 ${WORKDIR}/ports-v2 ${D}/etc/user-module/ports-v2
 }