Brief
Home Assistant 2026.9 modernizes Modbus with shared connections and UI device picker
Home Assistant 2026.9 introduces Modbus integrations that share a single connection and let users pick their device in the UI, removing the need to hand-write register maps in YAML.
Modbus previously required hand-writing a register map in YAML, which kept many devices out of reach. Now, integrations that already know how a device talks over Modbus can share a single connection instead of competing for it, and users simply select their device in the UI like any other integration. The release also adds Cloud voice processing, active alerts and favorites for the Security dashboard, a shared Sources panel for History and Activity, a new network map for Matter, keyboard- and sound-navigable charts, and 13 new integrations.
Our reading
Our reading is that this change lowers the barrier for operators who previously avoided Modbus devices due to YAML complexity, making it a practical workflow improvement.
Source details and supporting facts
Each line is stated by the page named above it.
Stated by home-assistant.io
- Home Assistant 2026.9 makes Modbus integrations share a single connection and allows device selection in the UI.
- Previously, Modbus required hand-writing a register map in YAML.
- The release includes 13 new integrations.
Sources
- Home Assistant blogText stored 14 September 2026
How this story was checked. Written from the 1 page listed above, stored 14 September 2026; claims checked against that stored text on 14 September 2026.
What that means
- 3 of 3 reported statements were confirmed against the page that carries them; the rest were removed rather than published.
- Figures in the text were required to appear in the stored source text: yes. Identifiers: yes.
- The check reads stored text only: no claim rests on a fresh look that did not happen.
- Where the reporting was silent, the text says so instead of filling the gap.