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71 lines
3.7 KiB
Plaintext
71 lines
3.7 KiB
Plaintext
---
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title: "Tasmota & Energy Monitoring"
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section: "smarthome"
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tags: "smarthome"
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parent: "/smarthome/"
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description: "Smart plugs and power monitoring across the flat with daily usage statistics."
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layout: base.njk
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---
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<h1>Tasmota & Energy Monitoring</h1>
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<div class="detail-content">
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<p>Power monitoring across the flat runs on a mix of Tasmota-flashed smart
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plugs, tracking accumulated kWh per device and feeding daily usage
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figures into the home dashboard. The setup uses a number of Tasmota-enabled devices
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covering kitchen appliances, office equipment, entertainment systems,
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and LED matrix displays.</p>
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<h2>What's metered</h2>
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<table>
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<tr><th>Device type</th><th>Typical use</th><th>Rough daily usage</th></tr>
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<tr><td>Fridge plug</td><td>Kitchen appliance monitoring</td><td>~0.8 kWh/day (very stable)</td></tr>
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<tr><td>Dishwasher plug</td><td>Appliance monitoring</td><td>~1.2 kWh/day (varies with use)</td></tr>
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<tr><td>Office/desk plug</td><td>Workstation + peripherals</td><td>~1.2-1.7 kWh/day</td></tr>
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<tr><td>Entertainment plugs (TV, Apple TV)</td><td>Media devices</td><td>Very low, Apple TV especially so</td></tr>
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<tr><td>LED matrix displays</td><td>Ambient info displays</td><td>~0.04 kWh/day each</td></tr>
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</table>
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<h2>Multi-socket power strips</h2>
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<p>Several rooms use multi-outlet smart power strips (each socket
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individually switchable and metered) rather than single smart plugs. This
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keeps things like "washing machine + dryer" or "office desk cluster" on
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one strip while still tracking each socket's consumption separately.</p>
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<h2>Flashing process</h2>
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<p>New devices go through a standard conversion flow (from the
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manufacturer's original cloud-dependent firmware to Tasmota) using a
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well-documented community process. It occasionally fails on the first
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attempt due to a transient Wi-Fi handshake issue, retrying resolves it
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without any special handling.</p>
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<h2>How the data flows</h2>
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<p>Each Tasmota plug publishes its power readings to MQTT via the
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Mosquitto broker running on the Docker host. A small subscription
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service picks up the per-device topics and writes the values into
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InfluxDB 2.x, tagged by device name, room, and measurement type
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(power, energy, voltage). The home dashboard then queries InfluxDB
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via Flux to display real-time and historical usage charts.</p>
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<h2>What this data is used for</h2>
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<ul>
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<li>Spotting appliances with unexpectedly high standby draw.</li>
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<li>Sanity-checking that "turned off" devices are actually drawing near-zero power.</li>
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<li>Feeding the home dashboard's live power figures alongside the climate sensors.</li>
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<li>Tracking long-term energy trends to identify efficiency improvements.</li>
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<li>Alerting when a device draws significantly more than its baseline (e.g., a failing appliance).</li>
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</ul>
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<h2>Air quality and climate data</h2>
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<p>The same InfluxDB instance also stores temperature and humidity readings from HomematicIP room sensors and ESP32 DHT22 devices. These feed the <a href="/smarthome/air-quality/">air quality dashboard</a>, which visualizes 24-hour climate history across 10 rooms. The energy and climate data share the MQTT-to-InfluxDB pipeline but live in separate measurement categories, keeping power monitoring and environmental sensing cleanly separated.</p>
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<h2>Why Tasmota over alternatives</h2>
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<p>Tasmota was chosen over alternatives like ESPHome or Tuya firmware for
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several reasons. The local-only control means no cloud dependency, the
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plugs work even if the internet is down. The MQTT integration is mature
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and well-documented. The energy monitoring sensors are accurate enough
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for home use (typically within 5% of a dedicated energy meter). And the
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firmware supports a wide range of hardware, making it easy to find
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compatible plugs at reasonable prices.</p>
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</div>
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