Michael Bernhart

Full-stack web dev who loves smart-home automation running in my own house.

Joined on Jun 8, 2026

Michael Bernhart

Nov 9

Home Assistant Backups on S3-Compatible Storage, Not AWS

#homeassistant #backup #selfhosted #s3

8 min read

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Michael Bernhart

Nov 2

Home Assistant Packages Instead of Include Files

#homeassistant #yaml #selfhosted #devops

7 min read

Michael Bernhart

Oct 26

Home Assistant Migration: Old and New in Parallel

#homeassistant #knx #selfhosted #migration

7 min read

Michael Bernhart

Oct 16

Move KNX Switches From the Home Assistant UI to knx.yaml

#homeassistant #knx #yaml #smarthome

7 min read

Michael Bernhart

Oct 9

One Day of Home Assistant Logs: 775 Errors, Seven Findings

#homeassistant #devops #debugging #selfhosted

9 min read

Michael Bernhart

Oct 6

Custom Cards in Home Assistant: Mushroom and button-card

#homeassistant #dashboard #javascript #opensource

7 min read

Michael Bernhart

Oct 2

Where Home Assistant Runs: One Small VM, Measured

#homeassistant #docker #selfhosted #kubernetes

4 min read

Michael Bernhart

Oct 1

21 Releases Behind: I Rebuilt Instead of Upgrading

#homeassistant #docker #selfhosted #devops

4 min read

Michael Bernhart

Sep 29

Splitting a 2,000-Line automations.yaml into 8 Files

#homeassistant #automation #yaml #smarthome

5 min read

Michael Bernhart

Sep 23

Home Assistant Thermostat on KNX: Base vs. Active Setpoint

#homeassistant #knx #smarthome #automation

8 min read

Michael Bernhart

Sep 12

An Alarm Dashboard + Tecnoalarm Keypad in Home Assistant

#homeassistant #smarthome #dashboard #security

5 min read

Michael Bernhart

Aug 28

Replacing Algolia with an In-Memory Search in Next.js 14

#nextjs #javascript #webdev #performance

4 min read

Michael Bernhart

Aug 7

Tapo H100: Cellar Humidity Monitoring in Home Assistant

#homeassistant #smarthome #sensor #automation

6 min read

Michael Bernhart

Aug 4

Shelly in Home Assistant: Local Switching & Energy Metering

#homeassistant #smarthome #energy #iot

6 min read

Michael Bernhart

Jul 30

I Built an Awesome List for Open-Source GEO Tools. The Licence Check Cut the Popular Ones.

#showdev #opensource #ai #seo

4 min read

Michael Bernhart

Jul 29

KNX Motion-Sensor Automations in Home Assistant

#homeassistant #knx #smarthome #automation

6 min read

Michael Bernhart

Jul 28

Updating Home Assistant in Docker Safely: My Workflow With Backup, Test and Rollback

#homeassistant #docker #selfhosted #devops

6 min read

Michael Bernhart

Jul 27

A "Last Motion" Sensor in Home Assistant: Per-Room Timestamps with input_datetime

#homeassistant #automation #smarthome #tutorial

4 min read

Michael Bernhart

Jul 24

Motion Light With Time-of-Day Brightness in Home Assistant: the choose Pattern (30% Night, 70% Morning, 100% Day)

#homeassistant #automation #smarthome #tutorial

5 min read

Michael Bernhart

Jul 23

A Self-Hosted Modern Data Stack Under €200/Month

#dataengineering #clickhouse #dbt #selfhosting

5 min read

Michael Bernhart

Jul 21

Decoupling a KNX Alarm from the JUNG Panel in Home Assistant

#homeassistant #knx #smarthome #automation

5 min read

Michael Bernhart

Jul 15

KNX Thermostats Drop to 'Standby' After Every Home Assistant Restart - A Startup Automation Fix

#homeassistant #knx #automation #smarthome

5 min read

Michael Bernhart

Jul 11

Window Open, Heating Off: Auto-Switch Each KNX Thermostat to Frost Protection in Home Assistant

#homeassistant #knx #automation #smarthome

4 min read

Michael Bernhart

Jul 10

A Robust Modbus Proxy: Reconnect, Stale-Cache Detection and Timeouts Done Right

#homeassistant #python #iot #devops

5 min read

Michael Bernhart

Jul 8

Solar Surplus into Hot Water: the AC·THOR in Home Assistant

#homeassistant #solar #energy #iot

6 min read

Michael Bernhart

Jul 3

Modbus Writes Through the Cache Proxy in Home Assistant

#homeassistant #python #iot #selfhosted

5 min read

Michael Bernhart

Jul 2

Pull a Cloud API into Home Assistant via REST Sensor

#homeassistant #api #tutorial #yaml

5 min read

Michael Bernhart

Jun 30

Self-Consumption & Autarky: PV Metrics in Home Assistant

#homeassistant #solar #energy #automation

6 min read

Michael Bernhart

Jun 28

What AI Crawlers Actually Do to a Small Blog: 9 Days of Logs

#ai #seo #webdev #opensource

4 min read

Michael Bernhart

Jun 26

Read the Huawei SUN2000 in Home Assistant Without a Custom Integration: Native Modbus YAML

#homeassistant #modbus #solar #iot

5 min read

Michael Bernhart

Jun 24

Build Your Own Modbus-TCP Cache Proxy in Python: One Inverter, Many Home Assistant Clients

#homeassistant #python #iot #selfhosted

6 min read

Michael Bernhart

Jun 23

Home Assistant — How to Install via Docker on an Azure Linux VM

#docker #tutorial #homeassistant #selfhosted

3 min read

Michael Bernhart

Jun 19

Control an AC·THOR 9s from Home Assistant When Modbus Writes Are Blocked: the my-PV Cloud API

#homeassistant #solar #api #iot

6 min read

Michael Bernhart

Jun 17

Detect a Failing PV String in Home Assistant: Shading, Dead Module or Loose MC4

#homeassistant #solar #smarthome #automation

4 min read

Michael Bernhart

Jun 16

The Best HACS Integrations for Home Assistant (My Must-Haves)

#homeassistant #hacs #smarthome #automation

3 min read

Michael Bernhart

Jun 14

An Open-Source SEO + GEO Audit Toolkit in Plain Node

#opensource #seo #node #webdev

4 min read

Michael Bernhart

Jun 11

How to Install HACS in Home Assistant, and the Marketplace from 2026.11

#homeassistant #hacs #smarthome #tutorial

8 min read

Michael Bernhart

Jun 9

What Is HACS? Community Store and Marketplace Explained

#homeassistant #tutorial #selfhosted #smarthome

5 min read

Michael Bernhart

Jun 8

Caching a Huawei SUN2000 over Modbus for Home Assistant

#python #homeassistant #selfhosted #iot

5 min read