SNMP
snmp
Many routers, Wi-Fi access points, printers, and other network-connected devices support the Simple Network Management Protocol (SNMP). This is a standardized method for monitoring/managing network-connected devices. SNMP uses a tree-like hierarchy where each node is an object. Many of these objects contain continuously updated lists of metrics like network interfaces throughput, disk activity, active devices on the network, toner levels, and such.
In Apple Home through HomeKit Bridge
What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.
| Entity | Shows up as | Note |
|---|---|---|
switch | Switch or outlet | |
device_tracker | Presence (as an occupancy sensor) |
What people report
SNMP polls network devices locally. A 6-outlet PDU with long string responses hit a 255-character state limit.
- Partly works1
| Device | In Home Assistant | In Apple Home | What they said | Source |
|---|---|---|---|---|
| SNMP 6-outlet PDU | Partly works Local | OIDs returning over 255 characters raise InvalidStateErrorSaved copyI have a 6x outlet PDU which supports many modes of of operation; SNMP, Modbus, Telnet, Socket. SNMP was my first choice. The OID I was retrieving provides a summary response. eg. … Excerpt saved from GitHub on 2026-10-23. | Issue #143228 · 2025-04 |
Gathered from GitHub issues, pull requests, discussions and docs, and from r/homeassistant. These are individual reports, so check the linked thread and the date before you buy.
How it connects
Local polling
Talks to the device on your network, asking it for updates every so often.
Details
| Installs (analytics) | 3,955 (0.56%) |
|---|---|
| Quality scale | Legacy |
| Added in | Home Assistant 0.57 |
| Set up in the UI | No, YAML |
| Maintainers | @nmaggioni |
In ReReHome
Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.
Bridges get their own settings page listing the accessories behind them.
