Introduction

This script reads values for a defined item from openHAB via the REST interface. The values are written to text files and converted to a specific format to import them in InfluxDB. see: https://docs.influxdata.com/influxdb/v1.2/write_protocols/line_protocol_reference/

Usage

Copy config.cfg.example to config.cfg and define your parameters like server name, user, password etc.

Start script ./rest2influxdb.sh <Item_Name>

Done.

(un)known Issues

• Tested with openhab 2.4 and influx 1.02
• The timestamps cannot be calculated correctly on macOS
• RRD compresses data, so the further you go into the past the bigger gaps you get between two data points.
  see: https://github.com/openhab/openhab1-addons/wiki/rrd4j-persistence
• I am not sure if the defined timestamps are correct to read as much data as possible.