127 lines
3.5 KiB
Markdown
127 lines
3.5 KiB
Markdown
# Shelly Plug (S)
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Shelly Plugs S are quite cheap but relatively accurate to measure power consumptions less than 2.5 kW.
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## Flash Tasmota
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There's an OpenSource project to flash Tasmota on Shelly Plugs: [mg2x](https://github.com/arendst/mgos-to-tasmota).
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Locate your Shellie's IP adress (in my case: 192.168.2.150) and update it "over the air" with the Tasmota firmware:
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http://192.168.2.150/ota?url=http://ota.tasmota.com/tasmota/shelly/mg2tasmota-ShellyPlugS.zip
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Your Shelly will return a JSON object that looks like that:
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```
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{
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"status": "updating",
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"has_update": false,
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"new_version": "20230109-114426/v1.12.2-g32055ee",
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"old_version": "20230109-114426/v1.12.2-g32055ee"
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}
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```
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After a while your Shelly Plug S should be flashed with Tasmota firmware.
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> Just be patient. This took longer than five minutes in my DSL connected network.
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The Shelly Plus S will create create a new Wifi.
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Join that Wifi and configure the device: http://192.164.4.1/
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You can configure it as a BlitzWolf SHP product.
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Then it offers you power measurement and a programmable toogle.
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It should be configurable just like our [plant monitor](../plant-monitor/README.md).
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Just enable MQTT and enter a shorter telemetry period.
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It will post MQTT messages unter a topic `tele/tasmota_891E97/SENSOR` like this one:
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```
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{
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"Time": "2023-02-27T16:45:07",
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"ENERGY": {
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"TotalStartTime": "2023-02-27T16:33:06",
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"Total": 0.004,
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"Yesterday": 0,
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"Today": 0.004,
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"Period": 0,
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"Power": 34,
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"ApparentPower": 44,
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"ReactivePower": 27,
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"Factor": 0.79,
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"Voltage": 253,
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"Current": 0.172
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}
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}
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```
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We now can consume this messages in Node-RED, store them in InfluxDB and build a dashboard in Grafana.
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### InfluxDB Bucket
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I created a bucket called `shelly`in InfluxDB, so we can store the messages in this bucket.
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### Node-RED
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I create a usual flow in Node-RED. A MQTT node fetches the values.
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The message is fed into a filter function to only store usefull information:
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```ini
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return {
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payload: {
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power: Number(msg.payload.ENERGY.Power),
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voltage: Number(msg.payload.ENERGY.Voltage),
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current: Number(msg.payload.ENERGY.Current)
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}
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};
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```
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The `payload` will be stored in InfluxDB in the bucket "shelly".
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### InfluxDB Data Explorer
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In Influx DB Data Explorer you can query the stored data.
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The query created by Data Explorer looks like that:
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```flux
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from(bucket: "shelly")
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|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
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|> filter(fn: (r) => r["_measurement"] == "msg")
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|> filter(fn: (r) => r["_field"] == "power" or r["_field"] == "voltage" or r["_field"] == "current")
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|> aggregateWindow(every: v.windowPeriod, fn: mean, createEmpty: false)
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|> yield(name: "mean")
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```
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### Grafana
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Using this query you can crate a dashboard in Grafana.
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## Links
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- [Pinout for the ESP8266 based Shelly Plug-S Smart Plug
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](https://faulty.cloud/blog/shelly-plug-s-pinout)
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- [Youtube video: Upgrade Shelly Switches | Easy NO Soldering Smart Garage Door Opener](https://www.youtube.com/watch?v=_oRr8FZyyQ0)
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- [mg2x](https://github.com/arendst/mgos-to-tasmota)
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- [Shelly Plug S Power Monitoring Plug Tasmota template](https://templates.blakadder.com/shelly_plug_S.html)
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