Sonoff Pow voltage spikes when not in use

Hardware
1

I have recently placed a Sonoff Pow running TASMOTA on my washing machine, and it has been working great with voltage detection to turn it off when it has finished a washing cycle.

The issue is the Sonoff seems to have small voltage spikes randomly throughout the day when it is switched off. Perhaps this is from WiFi, but I wouldn’t have thought it would go as high as 9-10 watts to ping WiFi. It seems odd. It’s almost like it is being turned on momentarily.

You can see the small spikes in the below picture. Is this an issue, is there a solution that someone knows off? Thanks in advance.

Capture

2

During the day the Sonoff is switched ON or OFF?

3

Switch on at the wall, the Sonoff itself is switched off.

4

Which version of Tasmota do you use?

5

Thee observations:

  1. As far as I can understand, the Sonoff power consumption is not measured, see http://tinkerman.cat/hlw8012-ic-new-sonoff-pow/#lightbox-gallery-NPLv/1/

  2. If the Sonoff is off there is no way the appliance can consume power, because the circuit is open

  3. In my Sonoff Pow with Tasmota, when the switch is OFF every indicator (current, voltage, watt, power factor) goes flat zero.

My suspect is of a software glitch. Do you have the latest Tasmota version?

6

5.0.7 Tasmota.

I have tried to flash the newest version, but each time have errors when compiling the code - missing files, etc. I have set the same config in the latest version as I have in 5.0.7.

7

You could use the “firmware upload” function and upload a compiled binary:


https://github.com/arendst/Sonoff-Tasmota/releases/download/v5.11.1/sonoff.bin
8

In tasmota 5.6 and 5.7 there are some fixes related to Sonoff Pow, maybe an update will resolve the glitch.

9

I’ve have tried this and the Sonoff became unresponsive, couldn’t access it via the webpage, or control it in any way. Even clicking the onboard button did nothing.

I’ve reflashed the old firmware again (5.0.7) to get it working. For some reason, I just can not seem to compile the newer version without getting constant errors.

10

Just post the errors. :wink: It will be a missing library usually.

1 Like
11

Did you ever solve this? I’m using a POW R2 and have the same issue where the watts will spike, causing false washing machine alerts.

12

I’m using an average sensor:

switch:
  - platform: mqtt
    name: "sonoff1663"
    state_topic: "stat/sonoff-1663/POWER"
    command_topic: "cmnd/sonoff-1663/POWER"
    availability_topic: "tele/sonoff-1663/LWT"
    qos: 1
    payload_on: "ON"
    payload_off: "OFF"
    payload_available: "Online"
    payload_not_available: "Offline"
    retain: true
    optimistic: false

sensor:
  - platform: statistics
    name: "sonoff1663 power stats"
    entity_id: sensor.sonoff1663_power
    sampling_size: 8
    max_age:
      minutes: 4
  - platform: template
    sensors:
      energy_costs_total:
        friendly_name: Total costs
        value_template: "{{ (states.sensor.sonoff1663_energy_total.state|float * 0.30)|round(2) }}"
        unit_of_measurement: €
        icon_template: mdi:cash-100

  - platform: mqtt
    name: "sonoff1663 energy today"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Today }}'
    unit_of_measurement: "kWh"
  - platform: mqtt
    name: "sonoff1663 energy yesterday"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Yesterday }}'
    unit_of_measurement: "kWh"
  - platform: mqtt
    name: "sonoff1663 energy total"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Total }}'
    unit_of_measurement: "kWh"

  - platform: mqtt
    name: "sonoff1663 power"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Power }}'
    unit_of_measurement: "W"
  - platform: mqtt
    name: "sonoff1663 voltage"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Voltage }}'
    unit_of_measurement: "V"
  - platform: mqtt
    name: "sonoff1663 current"
    state_topic: "tele/sonoff-1663/SENSOR"
    value_template: '{{ value_json.ENERGY.Current }}'
    unit_of_measurement: "A"


input_boolean:
  laundry_ready:
    name: Laundry ready
    icon: mdi:tshirt-crew
    initial: off
  laundry_hurled:
    name: Laundry hurled
    icon: mdi:gauge-full
    initial: off

alert:
  laundry_ready:
    name: The laundry is ready!
    entity_id: input_boolean.laundry_ready
    state: 'on'
    repeat:
      - 15
      - 15
      - 30
      - 60
    can_acknowledge: true
    skip_first: false
    notifiers:
      - telegram_mobile

This is my automation:

automation:
  - alias: Turn off the laundry ready indicator
    initial_state: true
    trigger:
      - platform: state
        entity_id: switch.sonoff1663
        from: 'on'
        to: 'off'
    action:
      - service: homeassistant.turn_off
        entity_id: input_boolean.laundry_ready
      - service: homeassistant.turn_off
        entity_id: input_boolean.laundry_hurled

  - alias: Turn on the laundry ready indicator
    initial_state: true
    trigger:
      - platform: numeric_state
        entity_id: sensor.sonoff1663_power_stats_mean
        below: 7
        for:
          minutes: 2
    condition:
      condition: and
      conditions:
        - condition: state
          entity_id: input_boolean.laundry_ready
          state: 'off'
        - condition: state
          entity_id: switch.sonoff1663
          state: 'on'
        - condition: state
          entity_id: input_boolean.laundry_hurled
          state: 'on'
    action:
      - service: homeassistant.turn_on
        entity_id: input_boolean.laundry_ready

- alias: Turn on the laundry hurled indicator
  initial_state: true
  trigger:
    - platform: numeric_state
      entity_id: sensor.sonoff1663_power_stats_mean
      above: 200
  condition:
    condition: and
    conditions:
      - condition: state
        entity_id: input_boolean.laundry_hurled
        state: 'off'
      - condition: state
        entity_id: switch.sonoff1663
        state: 'on'
  action:
    - service: homeassistant.turn_on
      entity_id: input_boolean.laundry_hurled

# groups.yaml

sonoff1663:
  name: Washing machine
  control: hidden
  entities:
    - switch.sonoff1663
    - sensor.sonoff1663_voltage
    - sensor.sonoff1663_power
    - sensor.sonoff1663_current
    - sensor.sonoff1663_energy_today
    - sensor.sonoff1663_energy_yesterday
    - sensor.sonoff1663_energy_total
    - sensor.energy_costs_total
    - sensor.sonoff1663_power_stats_mean
    - input_boolean.laundry_hurled
    - input_boolean.laundry_ready