mirror of https://github.com/arendst/Tasmota.git
Typographical errors ficed, spelling of consumption
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@ -11,19 +11,19 @@ If your Sonoff needs to do something continuously, this will be affected. E.g. S
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- In general: All realtime related commands (like `TelePeriod`, `BlinkTime`, `PulseTime<x>` and so on) and all realtime related results (uptime, Sonoff Pow power calculation etcetera) are also affected by the `Sleep` command. You may need to adapt the time values for those command to get capable results.
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- as the WiFi Modem on an ESP8266 is the major consumer - using Sleep with WiFi AP mode enabled is more or less without effect.
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## Sonoff power consumtion and measurement
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## Sonoff power consumption and measurement
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The result of the most low price plug-in home energy meters are very imprecise for power consumtion < 10 W and become more and more imprecise for power consumtion like Sonoff devices have (< 1.5 W); furthermore the results of such meters are depending very strong of the load type (capacitive/inductive) and is absolutly imprecise for non-ohmic load types having switch-mode power supply like Sonoff devices.
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The result of the most low price plug-in home energy meters are very imprecise for power consumption < 10 W and become more and more imprecise for power consumption like Sonoff devices have (< 1.5 W); furthermore the results of such meters are depending very strong of the load type (capacitive/inductive) and is absolutely imprecise for non-ohmic load types having switch-mode power supply like Sonoff devices.
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Additonal to that, using Sleep - which periodicaly cycles the power of the Sonoff between 20% and 100% - the result of such meters are more or less useless.
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## Example of power consumtion
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## Example of power consumption
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### Absolute AC line measurement using calibrated meter
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The following measurement was done directly on 230 V/AC line using a [Sonoff Dual R2](http://sonoff.itead.cc/en/products/sonoff/sonoff-dual) and two different [Sonoff S20](http://sonoff.itead.cc/en/products/residential/s20-socket) connected on different MID calibrated meter (Eastron SMD630 MID/saia-burgess ALE3).
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#### Sonoff power consumtion using Sleep
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#### Sonoff power consumption using Sleep
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Device | Sleep 0 | Sleep 1 | Sleep 50 | Sleep 200
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------------ | ------------ | ------------ | ------------- | ------------
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Sonoff Dual R2 | 1.24 W | 0.84 W | 0.76 W | 0.68 W
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@ -37,16 +37,16 @@ All measurements were done with
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- relays off
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- measure period of 24-56 h to reduce measuring fault
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The first impression is that a higher sleep value reduce the consumtion, but slightly. The second result is that using `Sleep <value>` (`value` ≠ 0, e. g. 1) is enough reducing the power consumtion at minimum 1/3 up to 45 % (value=200).
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The first impression is that a higher sleep value reduce the consumption, but slightly. The second result is that using `Sleep <value>` (`value` ≠ 0, e. g. 1) is enough reducing the power consumption at minimum 1/3 up to 45 % (value=200).
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### Quantity measurement of ESP-12 module/ESP8266 3.3V line
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To find out why Sleep reduce the power consumtion and with which quantity, the 3.3 V DC current of ESP8266 of an ESP-12 module was measured using an oscilloscope and (for easy reading the oscilloscope diagram) a 1 Ω shunt which results in a 1:1 interpretation between voltage and current.
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To find out why Sleep reduce the power consumption and with which quantity, the 3.3 V DC current of ESP8266 of an ESP-12 module was measured using an oscilloscope and (for easy reading the oscilloscope diagram) a 1 Ω shunt which results in a 1:1 interpretation between voltage and current.
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This measurement simplified the measure of a time based power consumtion; no integration must be done. On the other side note that the quantity measurement does not respect the effectiveness of the complete Sonoff circuit.
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This measurement simplified the measure of a time based power consumption; no integration must be done. On the other side note that the quantity measurement does not respect the effectiveness of the complete Sonoff circuit.
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#### Sleep 0
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Using `Sleep 0` there are no `delay()` calls in Tasmota main loop and therefore the power consumtion is continuous at current ~80 mA:
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Using `Sleep 0` there are no `delay()` calls in Tasmota main loop and therefore the power consumption is continuous at current ~80 mA:
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![sleep 0](https://user-images.githubusercontent.com/6636844/36341353-2c67b1e8-13ed-11e8-8e45-b75136704291.png)
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#### Sleep 1
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