modbus-troubleshooting

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Diagnostics for Modbus in Home Assistant custom components—framing/extra-data errors, unit_id mismatches, pacing/timeouts, write contention, and logging patterns.

By plebann schedule Updated 1/12/2026

play_arrow Run Skill in Manus View GitHub

name: modbus-troubleshooting description: Diagnostics for Modbus in Home Assistant custom components—framing/extra-data errors, unit_id mismatches, pacing/timeouts, write contention, and logging patterns. license: Complete terms in LICENSE.txt

Modbus Troubleshooting

Use when Modbus IO misbehaves (timeouts, extra data, wrong values).

Quick checks

Verify device_id/unit_id on every call; wrong unit → timeouts.
Add pacing (message_wait_milliseconds) and avoid immediate post-write polls.
For RTU-over-TCP, flush/reset framer/buffer; reconnect on extra-data.
Log address/unit/function and raw words to spot endian or offset issues.

References

Install via CLI

npx skills add https://github.com/plebann/eastron_SDM_HA_integration --skill modbus-troubleshooting

Repository Details

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