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public:projects:monitoring [2026/06/10 20:28] – removed - external edit (Unknown date) 127.0.0.1public:projects:monitoring [2026/06/10 20:29] (current) – ↷ Links adapted because of a move operation admin2
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 +====== Monitoring ======
 +
 +===== Overview =====
 +
 +There is a Raspberry Pi running:
 +
 +  * home page to list services (http://sensing.shhm.uk)
 +  * Packaged Software
 +    * [[https://docs.influxdata.com/influxdb/v2/|InfluxDB]] to collect measurements (http://sensing.shhm.uk:8086)
 +    * [[https://prometheus.io/docs/introduction/overview/|Prometheus]] to collect measurements (http://sensing.shhm.uk:9090)
 +    * [[https://grafana.com/docs/grafana/latest/|Grafana]] to display dashboards of measurements (http://sensing.shhm.uk:3000)
 +  * Custom-made Software
 +    * MQTT listener which posts to InfluxDB ([[https://github.com/sheffieldhackspace/hackspace-sensing-mqtt-listener/|code]])
 +    * several ESP8266/etc sending data to MQTT ([[https://github.com/sheffieldhackspace/hackspace-sensing|code]])
 +    * Shelly Pro 3EM Prometheus exporter ([[https://github.com/sheffieldhackspace/shellypro3em-mqtt-prometheus-exporter|source]]) for power metrics
 +
 +{{:public:2026-06-10_environment-monitoring.webp?400|}}
 +
 +===== Code =====
 +
 +  * generic ESP8266 C++ code for sensors to send measurements to MQTT
 +    * https://github.com/sheffieldhackspace/hackspace-sensing/
 +  * MQTT to InfluxDB listener (on Pi)
 +    * https://github.com/sheffieldhackspace/hackspace-sensing-mqtt-listener/
 +
 +===== Sensors =====
 +
 +==== MQTT Message Format ====
 +
 +any environment monitoring MQTT message that looks like "SHHNoT/environment/#" will attempt to be parsed by the MQTT listener. It *should* have the format:
 +
 +  SHHNoT/environment/room<X>/sensor<Y>/<measurement> <value>
 +
 +e.g.,
 +
 +  SHHNoT/environment/room-d/sensor_ESP8266-SCD40-1/temperature 23.414
 +
 +==== Measurements ====
 +
 +All sensors should broadcast the measurements:
 +
 +  * a special "status" measurement which should be "on" when they connect to MQTT (see code above)
 +  * data they measure (e.g., "temperature"/"co2"/"humidity")
 +  * RSSI WiFi strength
 +
 +an example payload for a single device could be:
 +
 +  SHHNoT/environment/room-d/sensor_ESP8266-SCD40-1/temperature 22.218
 +  SHHNoT/environment/room-d/sensor_ESP8266-SCD40-1/co2  587
 +  SHHNoT/environment/room-d/sensor_ESP8266-SCD40-1/humidity 64.819
 +  SHHNoT/environment/room-d/sensor_ESP8266-SCD40-1/rssi  -60
 +
 +==== Sensors in use ====
 +
 +1. SCD40 (CO2/humidity/temp)
 +
 +{{public:projects:sensor_scd40.jpg?300|}}
 +
 +2. SCD40 (CO2/humidity/temp) and DS18B20 (temperature)
 +
 +(the red wire goes from D5/GPIO14)
 +
 +{{public:projects:sensor_scd40-and-ds18b20.jpg?400|}}
 +
 +3. SDS011 (particulate matter – PM2.5 and PM10)
 +
 +{{public:projects:sensor_sds011.jpg?300|}}
 +
 +===== Brother exporter =====
 +
 +setup:
 +
 +<code>
 +# install
 +git clone https://github.com/d0ugal/brother-exporter
 +# build
 +go mod download
 +VERSION=${VERSION:-$(git describe --tags --always --dirty 2>/dev/null || echo "dev")}
 +COMMIT=${COMMIT:-$(git rev-parse --short HEAD 2>/dev/null || echo "unknown")}
 +BUILD_DATE=${BUILD_DATE:-$(date -u +"%Y-%m-%dT%H:%M:%SZ")}
 +CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -a -installsuffix cgo -ldflags="-s -w \
 +  -X github.com/d0ugal/brother-exporter/internal/version.Version=$VERSION \
 +  -X github.com/d0ugal/brother-exporter/internal/version.Commit=$COMMIT \
 +  -X github.com/d0ugal/brother-exporter/internal/version.BuildDate=$BUILD_DATE" \
 +  -o brother-exporter ./cmd/main.go
 +
 +# config
 +cp config.example.yaml config.yaml
 +sed 's+host: "192.168.1.100"+host: "10.3.50.21"+'
 +
 +# service file
 +cat << EOUFILE | sudo tee /etc/systemd/system/brother-exporter.service
 +[Unit]
 +Description=Brother Printer Exporter
 +Documentation=https://wiki.sheffieldhackspace.org.uk/members/projects/monitoring#brother_exporter
 +After=network-online.target
 +
 +[Service]
 +Type=simple
 +User=prometheus
 +Group=prometheus
 +Restart=on-failure
 +RestartSec=10
 +WorkingDirectory=/usr/shhm/brother-exporter/
 +ExecStart=/usr/shhm/brother-exporter/brother-exporter
 +
 +[Install]
 +WantedBy=multi-user.target
 +EOUFILE
 +sudo systemctl enable brother-exporter.service
 +sudo systemctl start brother-exporter.service
 +sudo systemctl status brother-exporter.service
 +
 +# test
 +curl http://sensing.shhm.uk:8080/metrics
 +</code>
 +
 +===== Mothership =====
 +
 +To install InfluxDB and Grafana on the Raspberry Pi, run something like:
 +
 +  # add users
 +  sudo useradd -r -s /bin/false influxdb
 +  sudo useradd -r -s /bin/false grafana
 +  sudo useradd -r -s /bin/false mqttlistener
 +  sudo useradd -r -s /bin/false prometheus
 +  
 +  # create folders
 +  mkdir -p /usr/shhm/influxdb
 +  mkdir -p /usr/shhm/grafana
 +
 +  # install influxdb
 +  sudo apt update
 +  sudo apt upgrade
 +  curl https://repos.influxdata.com/influxdata-archive.key | gpg --dearmor | sudo tee /usr/share/keyrings/influxdb-archive-keyring.gpg >/dev/null
 +  echo "deb [signed-by=/usr/share/keyrings/influxdb-archive-keyring.gpg] https://repos.influxdata.com/debian stable main" | sudo tee /etc/apt/sources.list.d/influxdb.list
 +  sudo apt update
 +  sudo apt install influxdb2
 +  sudo systemctl status influxdb.service
 +  
 +  # install grafana
 +  sudo apt-get install -y apt-transport-https software-properties-common wget
 +  sudo mkdir -p /etc/apt/keyrings/
 +  wget -q -O - https://apt.grafana.com/gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/grafana.gpg > /dev/null
 +  echo "deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main" | sudo tee -a /etc/apt/sources.list.d/grafana.list
 +  sudo apt-get update
 +  sudo apt-get install grafana
 +
 +  # install prometheus
 +  cd /usr/shhm/
 +  wget https://github.com/prometheus/prometheus/releases/download/v2.53.5/prometheus-2.53.5.linux-arm64.tar.gz
 +  tar -xzf prometheus-2.53.5.linux-arm64.tar.gz
 +  rm prometheus-2.53.5.linux-arm64.tar.gz
 +  mv prometheus-2.53.5.linux-arm64 prometheus
 +  sudo chown -R prometheus:prometheus prometheus
 +  cat << EOUFILE | sudo tee /etc/systemd/system/prometheus.service
 +  [Unit]
 +  Description=Prometheus Server
 +  Documentation=https://prometheus.io/docs/introduction/overview/
 +  After=network-online.target
 +  
 +  [Service]
 +  User=prometheus
 +  Group=prometheus
 +  Restart=on-failure
 +  RestartSec=10
 +  ExecStart=/usr/shhm/prometheus/prometheus \
 +    --config.file=/usr/shhm/prometheus/prometheus.yml \
 +    --storage.tsdb.path=/usr/shhm/prometheus/data \
 +    --storage.tsdb.retention.time=30d
 +  
 +  [Install]
 +  WantedBy=multi-user.target
 +  EOUFILE
 +  sudo systemctl enable prometheus.service
 +  sudo systemctl start prometheus.service
 +  sudo systemctl status prometheus.service
 +  
 +  # install node_exporter
 +  cd /usr/shhm/
 +  wget https://github.com/prometheus/node_exporter/releases/download/v1.9.1/node_exporter-1.9.1.linux-arm64.tar.gz
 +  tar -xzf node_exporter-1.9.1.linux-arm64.tar.gz
 +  rm node_exporter-1.9.1.linux-arm64.tar.gz
 +  mv node_exporter-1.9.1.linux-arm64 node_exporter
 +  sudo chown -R prometheus:prometheus node_exporter
 +  cat << EOUFILE | sudo tee /etc/systemd/system/node_exporter.service
 +  [Unit]
 +  Description=Node Exporter for Prometheus
 +  After=network.target
 +  
 +  [Service]
 +  Type=simple
 +  User=prometheus
 +  Group=users
 +  WorkingDirectory=/usr/shhm/node_exporter
 +  ExecStart=/usr/shhm/node_exporter/node_exporter
 +  Restart=on-failure
 +  RestartSec=10
 +  
 +  [Install]
 +  WantedBy=multi-user.target
 +  EOUFILE
 +  sudo systemctl enable node_exporter.service
 +  sudo systemctl start node_exporter.service
 +  sudo systemctl status node_exporter.service
 +
  
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