# Plebann Eastron Sdm Ha Integration Ha Modbus Integration > HA Modbus Integration - Skill: `tomevault-io/plebann-eastron-sdm-ha-integration-ha-modbus-integration` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/plebann-eastron-sdm-ha-integration-ha-modbus-integration` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/plebann-eastron-sdm-ha-integration-ha-modbus-integration/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Integrations & APIs - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/plebann-eastron-sdm-ha-integration-ha-modbus-integration --- # HA Modbus Integration Use this when implementing or refactoring HA custom components that communicate with Modbus devices. ## Quick start - Pick connection mode (tcp, rtuovertcp, serial); set timeout and message spacing. - Always pass the correct unit id (device_id/slave) on every read/write. - Batch contiguous reads, lock IO, and tier polling; cache last good data for availability. - Encode multi-register writes (float32/uint32) and avoid immediate post-write refresh. - Use translation_key + entity.sensor names and stable unique/device ids. ## References - [references/connection-modes.md](references/connection-modes.md) - [references/read-write-patterns.md](references/read-write-patterns.md) - [references/resilience-and-pacing.md](references/resilience-and-pacing.md) - [references/translations-and-ids.md](references/translations-and-ids.md) --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/plebann) — claim your Tome and manage your conversions.