Presto Prometheus

A Prometheus dashboard for the Pimoroni Presto display, rendering MeshCore network metrics from a Prometheus-compatible endpoint.

Display

The dashboard shows three metric groups:

Section	Metrics	Color
Nodes	Total connected nodes	Blue
Advertisements	1h / 24h / 7d windows	Pink
Messages	1h / 24h / 7d windows	Teal

Metrics are refreshed from the Prometheus API every 60 seconds.

Requirements

• Pimoroni Presto (RP2350-based display)
• Presto MicroPython firmware with picovector support
• Wi-Fi connectivity
• A Prometheus server exposing meshcore_* metrics

Setup

1. Clone or copy the project files onto the Presto:

   main.py
   roboto-medium-symbols.af
   

2. Create a secrets.py in the project root with your Wi-Fi credentials:

   WIFI_SSID = "your-ssid"
   WIFI_PASSWORD = "your-password"

3. Configure the Prometheus endpoint in main.py if needed:

   PROMETHEUS_URL = "https://metrics.example.com"

4. Power on the Presto — the script runs automatically via main.py.

Configuration

Constant	Default	Description
PROMETHEUS_URL	https://metrics.ipnt.uk	Prometheus server base URL
QUERY	meshcore_* regex	PromQL query string
REFRESH_INTERVAL	60	Seconds between metric fetches

Expected Metrics

The dashboard queries the following Prometheus metric names:

• meshcore_nodes_total — current node count
• meshcore_advertisements_received — with window label (1h, 24h, 7d)
• meshcore_messages_received — with window label (1h, 24h, 7d)

Project Structure

presto-prometheus/
├── main.py                    # Application entry point
├── secrets.py                 # Wi-Fi credentials (gitignored)
├── roboto-medium-symbols.af   # Vector font file
├── docs/
│   └── graphics.md            # Presto graphics API reference
└── LICENSE                    # GPL-3.0

License

GPL-3.0