A Python script to monitor De Dietrich boilers equiped with Diematic system, using Modbus RS-845 protocol. The values fetched from the boiler are sent to an InfluxDB database, for monitoring with tools like Chronograf or Grafana:
NOTE: The original repository isn't maintained any more, but I will continue to update this fork.
- A De Dietrich boiler with Diematic regulation and a mini-din socket
- A mini-din cable
- A RS-845 to USB adapter
- A nano-computer with a USB port and Python3 installed (Raspberry pi or similar)
Check links in the "references" section below on how to do the hardware setup.
git clone https://github.com/piwai/diematic.git
cd diematic
python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt
cp diematic.yaml.orig diematic.yaml
vi diematic.yaml
Run python3 diematic.py --help
usage: diematic.py [-h] [-b {none,influxdb}] [-d DEVICE]
[-l {critical,error,warning,info,debug}]
optional arguments:
-h, --help show this help message and exit
-b {none,influxdb}, --backend {none,influxdb}
select data backend (default is influxdb)
-d DEVICE, --device DEVICE
define modbus device
-l {critical,error,warning,info,debug}, --logging {critical,error,warning,info,debug}
define logging level (default is critical)
python3 diematic.py --backend none --logging debug
To create the InfluxDB database, use the init-file file. Be sure to update the password line 4.
influx -database diematic -precision rfc3339.sql < init-influxdb.sql
To run the script every minute and feed the database, crontab -e and add the following line:
*/1 * * * * ~/diematic/launcher.sh