how to connect xiomi temperature and humidity sensor to openhab without a gateway

I've a xiomi temperature and humidity sensor with bluetooth.

I'm Using openhab and MQTT so it's easy to connect:

1) Create this script (xiomi.sh) :

Replace BT with your sensor's mac address.

You can find it with:  sudo hcitool lescan

(look for MJ_HT_V1)

Change the IP address (192.168.1.100) to your MQQT server address.

#!/bin/bash

for pid in $(pidof -x xiomi.sh); do

    if [ $pid != $$ ]; then

        echo "[$(date)] : xiomi.sh : Process is already running with PID $pid"

        exit 1

    fi

done

bt="4C:65:A8:DC:AD:CF"

sensor="sensor"

RET=1

until [ ${RET} -eq 0 ]; do

    data=$(/usr/bin/timeout 20 /usr/bin/gatttool -b $bt --char-write-req --handle=0x10 -n 0100 --listen | grep "Notification handle" -m 2)

    RET=$?

    sleep 5

done

RET=1

until [ ${RET} -eq 0 ]; do

    battery=$(/usr/bin/gatttool -b $bt --char-read --handle=0x18 | cut -c 34-35)

    RET=$?

    sleep 5

done

temp=$(echo $data | tail -1 | cut -c 42-54 | xxd -r -p)

humid=$(echo $data | tail -1 | cut -c 64-74 | xxd -r -p)

batt=$(echo "ibase=16; $battery"  | bc)

if [[ "$temp" =~ ^[0-9]+(\.[0-9]+)?$ ]]

then

echo "$temp"

/usr/bin/mosquitto_pub -h 192.168.1.100 -V mqttv311 -t "xiaomi/$sensor/temp" -m "$temp"

fi

if [[ "$humid" =~ ^[0-9]+(\.[0-9]+)?$ ]]

then

/usr/bin/mosquitto_pub -h 192.168.1.100 -V mqttv311 -t "xiaomi/$sensor/humidity" -m "$humid"

fi

if [[ "$batt" =~ ^[0-9]+(\.[0-9]+)?$ ]]

then

/usr/bin/mosquitto_pub -h 192.168.1.100 -V mqttv311 -t "xiaomi/$sensor/battery" -m "$batt"

fi

2) Make this script run  every minute  with crontab:

chown +777 xiomi.sh

crontab -e

add this line:

* * * * * /home/openhabian/xiomi.sh

3) Define your things for mqtt:

Type number : Xiomi_Sensor_Humidity "Xiomi_Sensor_Humidity" [ stateTopic="xiaomi/sensor/humidity"]
        Type number : Xiomi_Sensor_Battery "Xiomi_Sensor_Battery" [ stateTopic="xiaomi/sensor/battery"]
        Type number : Xiomi_Sensor_Temp "Xiomi_Sensor_Temp" [ stateTopic="xiaomi/sensor/temp"]

4) define your items:

Number          Humidity    "Humidity [%.1f ]"      (gTemperature) { channel="mqtt:topic:myUnsecureBroker:mything:Xiomi_Sensor_Humidity" }
Number          Battery    "Battery [%.1f ]"      (gTemperature) { channel="mqtt:topic:myUnsecureBroker:mything:Xiomi_Sensor_Battery" }
Number          Xiomi_Sensor_Temp    "Xiomi_Sensor_Temp [%.1f ]"      (gTemperature) { channel="mqtt:topic:myUnsecureBroker:mything:Xiomi_Sensor_Temp" }

All done now you can read the sensor data and display ,log, automate etc..