Last update: 2024/02/01

• Python script removed, all the logic is implemented using Node-RED
• MQTT data is stored InfluxDB
• Grafana can be used to display trends
• minor fixes and improvements

FreeDS-SCADA

FreeDS SCADA developed using Node-RED

Project objectives

This project implements a SCADA for FreeDS, developing these functions:

• shows information about FreeDS status
• allows enabling/disabling PWM and switching between modes AUT<-->MAN
• implements two set points in order to switch to MAN mode when the temperature is <= Low_temperature_set_point and switches to AUTO mode when the temperature is >= Low_temperature_set_point+Temperature_increase_set_point

Requeriments

1. A PC or Raspberry Pi, I'm using a Raspberry Pi 2 and a 16 GB SD card
2. Debian or Raspberry Pi OS administration skills
3. Install and configure Mosquito MQTT broker and required utilities:
   https://randomnerdtutorials.com/how-to-install-mosquitto-broker-on-raspberry-pi/

sudo apt install mosquitto mosquitto-clients influxdb influxdb-client

Edit /etc/mosquitto/mosquitto.conf and add at the end:

allow_anonymous true
listener 1883 0.0.0.0

Enable and restart Mosquitto:

sudo systemctl enable mosquitto.service
sudo service mosquitto restart

4. Install Node-RED:
   https://nodered.org/docs/getting-started/raspberrypi

bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) 
sudo systemctl enable nodered.service
sudo service nodered restart

Access to Node-RED from a Internet browser:
http://raspberry-pi-IP:1880
http://raspberry-pi-IP:1880/ui (runtime)

5. Create FreeDS database on InfluxDB:
   

$ influx
> create database FreeDS
> quit 

6. Optional but recommendable:

• download MQTT explorer in order to debug MQTT broker: http://mqtt-explorer.com/
• configure your timezone and enable time synchronization:
  raspi-config --> Localisation Options --> Timezone

sudo raspi-config
sudo systemctl enable systemd-timesyncd

7. Log into Node-RED using http://raspberry-pi-IP:1880 and install node-red-dashboard and node-red-contrib-influxdb:
   Menu-->Manage Palete-->Install and search node-red-dashboard/node-red-contrib-influxdb, select it for installation and accept

8. Download FreeDS-SCADA.json, import it into Node-RED and enjoy !