READ ME

This is a short Python script to show an end to end connection from Zenoh IoT Protocol to a Panel Dashboard Webapplication, which could run in a Notebook to analyse the incoming IoT Data.

Prerequisites

Install and execute

1. Zenoh Installation INFO: Zenoh upgrade 30 September 2022 and API changed! (This is not yet included here)

2. Zenoh First App

   Adapt the Producer topic to the one in the panel_script py or the other way around.

   • "'/myhome/kitchen/temp'" Same for the Zenoh Broker
   • "'/myhome/**'"

   Start zenoh broker:

   zenohd --mem-storage='/myfactory/**' 
   

3. Apache IoTDB Quickstart

   Download Apache IoTDB

   ./sbin/start-server.sh 
   

   ./sbin/start-cli.sh -h 127.0.0.1 -p 6667 -u root -pw root
   

   Execute in IoTDB CLI:

   SET STORAGE GROUP TO root.myfactory
   CREATE TIMESERIES root.myfactory.machine1.temperature WITH DATATYPE=INT32, ENCODING=PLAIN
   INSERT INTO root.myfactory.machine1(timestamp,temperature) values(200,21) // Test Insert
   SELECT * FROM root.myfactory.machine1
   

4. Install Panel

   Used Python packages:

   import zenoh
   from iotdb.Session import Session
   from datetime import datetime
   import panel as pn
   

5. Execute in a Shell / Terminal (whith running Zenoh Broker and Apache IoTDB):

   panel serve 'panel_script.py' --autoreload --show