IoT Devices Guide

IoT gateways and dynamic IPs

IoT devices deployed in the field — industrial sensors, environmental monitors, edge compute nodes — often sit behind connections with dynamic IP addresses. Cellular modems, consumer-grade broadband, and satellite links all assign IPs that can change without warning.

Without DDNS, you lose remote access every time the IP rotates. NovaDNS gives each device a stable hostname like sensor-hq.novaip.link that follows the IP wherever it goes.

Updating from embedded devices

The NovaDNS API is a single HTTP endpoint — perfect for resource-constrained devices. Any tool that can make an HTTP request can update your hostname.

Using curl or wget

# Update using token auth
curl "https://novadns.io/api/update?token=YOUR_TOKEN"

# Or with wget (common on embedded Linux)
wget -qO- "https://novadns.io/api/update?token=YOUR_TOKEN"

Using Python

import urllib.request

TOKEN = "YOUR_64_CHAR_TOKEN"
url = f"https://novadns.io/api/update?token={TOKEN}"

with urllib.request.urlopen(url) as resp:
    print(resp.read().decode())

Run this on a cron job every 5 minutes, or trigger it whenever your device detects a network change. See the API Reference for all available parameters.

Platform integration

NovaDNS works alongside your existing IoT stack. Common integration patterns include:

Managing large device fleets

When you have dozens or hundreds of devices, NovaDNS features help you stay organized:

• Host groups — organize devices by site, project, or function. Share credentials across a group for easier provisioning.
• Team workspaces — give multiple team members access to manage devices without sharing personal credentials.
• Per-device tokens — each device gets its own 64-character token. Revoke one compromised device without affecting the rest.
• Paid plans — scale from 25 to 500 devices. All paid plans include IPv6 subnet support and custom TTL.

Webhook integration for monitoring

NovaDNS can send a webhook every time a device's IP changes. Use this to:

• Alert your monitoring system (Grafana, Datadog, PagerDuty) when a device goes offline or changes IP.
• Automatically update firewall rules or VPN configurations.
• Log IP changes to a central database for audit and compliance.
• Trigger re-provisioning scripts when a site comes back online with a new address.

See the Webhooks guide for setup instructions and payload format.