Monthly Archives: June 2022

Monitor Energy with Shelly 3em, Raspberry Pi, Node Red, PostgreSQL, MQTT(Mosquito), …

Trying to write down some of the things I did to get this working

What Shelly 3em publishes

You can see all the topics of the mqtt broker by doing like this :
mosquitto_sub -d -v -t “#”
The ‘#’ means ALL topics, and by doing this I will get something like this :

Install Node Red

bash <(curl -sL

Install Mosquito

sudo apt update && sudo apt upgrade
sudo apt install -y mosquitto mosquitto-clients
sudo systemctl enable mosquitto.service
mosquitto -v

show all what comes in regardless of topic (show all topics,, kind of…)
mosquitto_sub -d -v -t “#”

cat /etc/mosquitto/mosquitto.conf
sudo vi /etc/mosquitto/mosquitto.conf

sudo systemctl restart mosquitto

Install PostgreSQL

(*) Do not forget to setup remote access to postgresql

Create database, schema and table

Node Red

Insert data into PostgreSQL