orno-modbus-influxdb-grafana

Read ORNO OR-WE-514 ModbusRTU energy meter via RS485 serial, insert values to influxdb server and graph with grafana

view live data on https://grafana.panu.it/d/ht_7Qt07k/mainline-orno-or-we-514?orgId=1&refresh=1m

The script reads the values every 10 seconds from the energy meter and insert them to the influxdb server. Read-out and publish takes about 1 second for all values @ 9600 Baud speed and 2-3 seconds @ 2400 Baud speed. I've use the default serial config: 9600 Baud / 8E1.

Parts List

• ORNO OR-WE-514 Modbus RTU Energy Meter (https://www.amazon.de/Orno-Wechselstromz%C3%A4hler-1-Phasen-Stromz%C3%A4hler-Zertifikat-Energieverbrauch/dp/B07Q1J1GJ4/ref=sr_1_1)
• USB-RS485 ch341-uart converter (https://www.makershop.de/module/kommunikation-module/rs485-adapter/)

Dependencies

Python libraries

• io
• minimalmodbus
• serial
• struct
• time
• timeloop
• datetime
• os
• influxdb
• sys

Intallation:

pip3 install io minimalmodbus serial influxdb time timeloop datetime

other:

• influxdb server
• Linux Platform (testet on Debian Bullseye) copy the script to a location of your choice. I've chosen /opt/modbus-influxdb/

cp modbus-influxdb.py /opt/modbus-influxdb/

change INSERTYOURDATA placeolder with your influxdb server need.

Starting the script

# change directory
cd /opt/modbus-influxdb/
# first make the script executable:
chmod +x modbus-influxdb.py
# executing:
./modbus-influxdb.py

Graph data

import the orno.json in your grafana and change the INSERTYOURDATA placeolder with your measurement, select your correct influxdb datasource.

Harware with Milk-V Duo256M

see Milk-V_duo256M.md