diff --git a/check_unifi-controller_udm.sh b/check_unifi-controller_udm.sh
new file mode 100644
index 0000000..1c8c711
--- /dev/null
+++ b/check_unifi-controller_udm.sh
@@ -0,0 +1,179 @@
+#!/bin/bash
+# script to list all UniFi devices from the given controller and get some infos
+# https://github.com/binarybear-de/cmk_check_unifi-controller
+SCRIPTBUILD="BUILD 2021-11-04-v3"
+
+###############################################################
+# you should not need to edit anything here - use the config file!
+###############################################################
+
+CONFIG_FILE=/etc/check_mk/unifi.cfg
+CONFIG_ACCESS=$(stat -c %a $CONFIG_FILE)
+CONFIG_OWNER=$(stat -c %U $CONFIG_FILE)
+
+if [ ! $CONFIG_ACCESS = 700 ] || [ ! $CONFIG_OWNER = root ] ; then
+        echo "2 UniFi-Controller - Config permission mismatch, must be 700 with owner root (current: $CONFIG_ACCESS, owner $CONFIG_OWNER)!"
+        exit 1
+fi
+
+# source the settings from file
+. $CONFIG_FILE
+
+# init counters and variables
+NUM_NOTNAMED=0
+NUM_NOTADOPTED=0
+STATUS=0
+
+# create the temporary files
+COOKIE_FILE=/tmp/unifi-check-cookie
+
+#the curl command used to pull the data from the WebUI
+CURL_CMD="curl --silent --cookie ${COOKIE_FILE} --cookie-jar ${COOKIE_FILE} $CURLOPTS"
+
+getDeviceInfo() {
+        echo $DEVICES | jq " .data | .[] | select(.serial | contains($1))"
+}
+getValueFromDevice() {
+        # read value, replace spaces with underscores and strip quotes (see issue #7)
+        echo $JSON | jq " .$1 " | sed -e 's/ /_/g' | sed -e 's/"//g'
+}
+getValueFromController() {
+        echo $JSON | jq ".data | .[] | .$1" | sed -e 's/"//g'
+}
+
+loginController() {
+        touch $COOKIE_FILE
+        chmod 600 $COOKIE_FILE
+        if ! $(${CURL_CMD} --request POST  --data '{\"username\":\"$USERNAME\", \"password\":\"$PASSWORD\"}' $BASEURL/api/auth/login > /dev/null) ; then
+                echo "2 UniFi-Controller - Controller unavailable! Login failed or no route to API!"
+                exit 1
+        fi
+}
+
+
+###############################################################
+# block 1: login to controller and get some controller status
+###############################################################
+
+# check if there's an existing login cookie - else try to login interactively
+if [ ! -e "$COOKIE_FILE" ]; then
+        loginController
+fi
+
+# get some basic information about the controller - if this fails the cookie may has expired. Then deleting cookie, login again and try again (UGLY)
+JSON=$(${CURL_CMD} --request GET  $BASEURL/proxy/network/api/s/default/stat/sysinfo)
+if [[ "$JSON" = *"LoginRequired"* ]]; then
+        rm $COOKIE_FILE
+        loginController
+        JSON=$(${CURL_CMD} --request GET  $BASEURL/proxy/network/api/s/default/stat/sysinfo)
+fi
+
+if [ "$(getValueFromController update_available)" = "true" ]; then
+        BUILD="$BUILD (Update avaiable!)"
+        STATUS=$STATUS_UPGRADABLE
+fi
+
+#output the controllers version
+echo "$STATUS UniFi-Controller - Hostname: $(getValueFromController hostname), Build $(getValueFromController build), Check-Script $SCRIPTBUILD"
+###############################################################
+# block 2: get every site's configuration
+###############################################################
+
+# get a list of all sites on the controller
+SITES=$(echo $(${CURL_CMD}  --request GET $BASEURL/proxy/network/api/self/sites) | jq '.data | .[] | .name' | sed -e 's/"//g')
+
+# loop over all sites
+for SITE in $SITES; do
+
+        # counter of sites
+        ((NUM_SITES=NUM_SITES+1))
+
+        # get all info of all devices of that site as json
+        DEVICES=$(${CURL_CMD} --request GET  --data "{}" $BASEURL/proxy/network/api/s/$SITE/stat/device)
+
+        # loop over all serial numbers (devices) on current site
+        for SERIAL in $(echo $DEVICES | jq '.data | .[] | .serial'); do
+
+                # select one device
+                JSON=$(getDeviceInfo $SERIAL)
+
+                # check if the device is already adopted. if not: set controller's state to warning and skip to next device
+                if [ "$(getValueFromDevice adopted)" = "false" ]; then
+                        ((NUM_NOTADOPTED=NUM_NOTADOPTED+1))
+                        break
+                fi
+
+                # increment device counter - only if device is adopted!
+                ((NUM_DEVICES=NUM_DEVICES+1))
+
+                # check if the device is 'null' which means it is not named at all and skip to next device
+                DEVICE_NAME=$(getValueFromDevice name)
+                if [ "$DEVICE_NAME" = "null" ]; then
+                        ((NUM_NOTNAMED=NUM_NOTNAMED+1))
+                        break
+                fi
+                # if named and adopted, get more info
+
+                CLIENTS=$(getValueFromDevice num_sta)
+                UPGRADEABLEFW=$(getValueFromDevice upgrade_to_firmware)
+                VERSION=$(getValueFromDevice version)
+                STATE=$(getValueFromDevice state)
+                SCORE=$(getValueFromDevice satisfaction)
+                LOCATING=$(getValueFromDevice locating)
+                STATUS=3 # set the service-state in check_mk, default is unknown if something weird happens
+
+                # determining the device's state
+                # https://community.ui.com/questions/Fetching-current-UAP-status/88a197f9-3530-4580-8f0b-eca43b41ba6b
+                case $STATE in
+                        1)      STATUS=0
+                                DESCRIPTION="CONNECTED";;
+
+                        0)      STATUS=2
+                                DESCRIPTION="DISCONNECTED!";;
+
+                        4)      STATUS=$STATUS_UPGRADING
+                                DESCRIPTION="UPGRADING";;
+
+                        5)      STATUS=$STATUS_PROVISIONING
+                                DESCRIPTION="PROVISIONING";;
+
+                        6)      STATUS=$STATUS_HEARTBEAT_MISSED
+                                DESCRIPTION="heartbeat missed!";;
+
+                        10)     STATUS=2
+                                DESCRIPTION="Adoption failed!";;
+
+                        *)      DESCRIPTION="Unkown state ($STATE)!";;
+                esac
+
+                # make a upgrade check
+                if [ "$UPGRADEABLEFW" != "$VERSION" ] && [ "$UPGRADEABLEFW" != "null" ]; then
+                        VERSION="$VERSION ($UPGRADEABLEFW avaible)"
+                        # check if status is "better" than upgradable. Prevent a previous CRIT event to be reduced to WARN simply because device is upgradable...
+                        if [ $STATUS -le $STATUS_UPGRADABLE ]; then STATUS=$STATUS_UPGRADABLE; fi
+                fi
+                if [ "$LOCATING" = "true" ]; then
+                        LOCATOR="Locator is enabled!"
+                        STATE=1
+                fi
+                # final output per device including infos and metrics
+                if [ "$USE_SITE_PREFIX" = "1" ]; then
+                        echo "$STATUS UniFi_$SITE-$DEVICE_NAME clients=$CLIENTS|score=$SCORE;;;-10;100 $DESCRIPTION, Site: $SITE, Clients: $CLIENTS, Firmware: $VERSION"
+                else
+                        echo "$STATUS UniFi_$DEVICE_NAME clients=$CLIENTS|score=$SCORE;;;-10;100 $DESCRIPTION, Site: $SITE, Clients: $CLIENTS, Firmware: $VERSION"
+                fi
+        done
+done
+
+###############################################################
+# block 3: summary of all devices
+###############################################################
+
+if [ "$NUM_NOTADOPTED" -eq 0 ] && [ "$NUM_NOTNAMED" -eq 0 ]; then
+        echo "0 UniFi-Devices devices=$NUM_DEVICES|sites=$NUM_SITES|unamed=$NUM_NOTNAMED|unadopted=$NUM_NOTADOPTED $NUM_DEVICES devices on $NUM_SITES sites - no unnamed or unadopted devices found"
+else
+        NUM_NOTADOPTED=$((NUM_NOTADOPTED/NUM_SITES))
+        echo "1 UniFi-Devices devices=$NUM_DEVICES|sites=$NUM_SITES|unamed=$NUM_NOTNAMED|unadopted=$NUM_NOTADOPTED $NUM_DEVICES devices on $NUM_SITES sites - found $NUM_NOTNAMED unnamed devices and $NUM_NOTADOPTED unadopted devices!"
+fi
+
+###############################################################