This is a network of sensors to monitor various environmental characteristics at a location. So far, there is support for temperature/humidity nodes (based on an HT11 sensor), and particulate/AQI monitoring based on a Plantronics PMS5003 sensor.
The sensor data are reported from each node over MQTT to a central server, which runs an MQTT daemon, an InfluxDB database, and a Grafana display interface. The server can be any computer, but I'm using a Raspberry Pi. I have it set up running an avahi mdns daemon to give it a local address at http://<pi-hostname>.local.
The hardware and software configurations for each of the nodes are documented in their respective folders:
- air-quality-node - An air quality sensor node, measuring particulate concentration and other environmental values.
- temp-node - An air temperature and humidity node.
You'll need to have Mosquitto or some other MQTT broker/server running. To install on Linux and enable the broker service, run the following:
sudo apt update
sudo apt install -y mosquitto mosquitto-clients
sudo systemctl enable mosquitto.service
There is then a local MQTT client that runs on the server (or elsewhere on the network) to grab messages and shove them into an InfluxDB database. To run this MQTT client, run:
python3 -m pip install paho-mqtt influxdb
python3 influxdb/mqtt_influxdb_bridge.py
Then set up your Grafana instance to point to the InfluxDB (good tutorial here), create a dashboard with the fields you want, and you'll end up with something like this:
