Synology SRM Router for Home Assistant

HACS	Release	CI	License

Shows your Synology routers and access points (SRM) in Home Assistant: load, traffic, WAN, clients per Wi-Fi band, DHCP, firewall rules with their hits, USB storage, and device trackers that tell which router or access point, and which radio, a client is connected to. Read only: it never changes a setting.

Unofficial. Not affiliated with, endorsed by or supported by Synology Inc.

Documentation: ha-synology-srm-router.eize.dev

What you get

• One device per router or access point: CPU load, memory, download and upload rate, clients (all, per Wi-Fi band and wired), last boot, USB storage, the channel of each Wi-Fi radio and whether each Wi-Fi network (primary, guest) is on, per band, with events (and a blueprint for notifications) when a fixed channel changes or a network is switched off or on.
• An event when a client joins the network for the first time, with a blueprint for notifications.
• Link and speed of every Ethernet port of routers and access points.
• On routers: WAN connection, public IPv4 and IPv6 address and the delegated IPv6 prefix, whether the router is behind NAT, DHCP leases, reservations and pool usage, and the firewall rules with their hits; events (and a blueprint) when the IPv6 prefix or the firewall changes, also while Home Assistant was off. Lists behind the counts show who holds an address, which devices are unknown, and what each firewall rule is about, named after your devices (sensors you switch on); a hits sensor per rule on request.
• Repairs when a router is set up in a way that weakens it: SRM reachable from the internet, the auto block off, or a firewall that lets traffic from the internet in by default.
• Device trackers that know which router or access point, connection and radio each client uses, named as in SRM.
• Checked certificates (by name for public certificate authorities such as Let's Encrypt, so renewals need nothing; pinned for SRM's own), and nothing but reading: the integration never changes a setting.

Install

In HACS, search for Synology SRM Router (or use the button above), install it and restart Home Assistant.

Then add the integration once per router and per access point, router first; Home Assistant also finds them on the network and offers them. Requires Home Assistant 2026.10.3 or newer. Details: Installation.

Without HACS: download synology_srm_router.zip from the latest release and unpack it into custom_components/synology_srm_router/ in your Home Assistant configuration (details).

Blueprints

Ready automations for notifications; import one, then create an automation per router or access point (router events: per router). Details: Events.

Blueprint	Notifies when	Import
New clients	a client joins the network for the first time (private MAC addresses only if you include them)
Router events	the IPv6 prefix of a local network changes, or the firewall does (rules added, removed, switched, moved, default policy), also while Home Assistant was off
Wi-Fi events	a radio set to a fixed channel runs on another one, or a Wi-Fi network is switched off or on

Documentation

• Configuration: certificate, account, device trackers, options
• Entities
• Events: new clients, Wi-Fi channel and network changes, IPv6 prefix and firewall changes, blueprints for notifications
• Dashboards: who is where, by radio, DHCP leases and unknown devices, firewall rules, the last router change
• Ideas and automations: presence, internet down, offline devices, data per day
• Troubleshooting: messages, repairs, diagnostics, removal

Roadmap

Planned work is grouped in milestones: 0.6.0 checks installing through Home Assistant's Marketplace. Ideas and reports are welcome in the issues.

Credits

Built on the library aiosynologysrm. Earlier integrations that showed what is possible: ha-synology-srm-plus and synology-srm-extended.

License

MIT. The icon and header are CC BY 4.0; their source is in eizedev/brand.