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ha-modbus-integration

@plebann/eastron_SDM_HA_integration
2
20

Patterns for building Home Assistant custom integrations that talk Modbus (TCP/RTU-over-TCP/serial): pymodbus device_id usage, safe polling/writing, pacing/backoff, encoding multi-register values, cached fallback, and translation-backed entities.

Install Skill

Shared

Installs to .agents/skills, used by Codex, Amp, Warp, Cursor, OpenCode, and more.

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GitHub Copilot
Personal

Available across projects.

$npx skills-installer add @plebann/eastron_SDM_HA_integration/ha-modbus-integration --client shared
Project

Writes to .agents/skills.

$npx skills-installer add @plebann/eastron_SDM_HA_integration/ha-modbus-integration -p --client shared
Note: Review the skill instructions before using it.

SKILL.md

name: ha-modbus-integration description: Patterns for building Home Assistant custom integrations that talk Modbus (TCP/RTU-over-TCP/serial): pymodbus device_id usage, safe polling/writing, pacing/backoff, encoding multi-register values, cached fallback, and translation-backed entities. license: Complete terms in LICENSE.txt

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