EFUN SH331W Smart Plug ESPHome Configuration file

[Eriobis (Simon Benoit)]

Hi,

I am new to Home assistant, wanted to convert my smart plug to ESPHome plug but I didn’t find any “premade” configuration for it.

Here the amazon link if you want to buy them :

EFUN SH331W 2.4GHz Wi-fi Smart Plug, Energy Motoring, No Hub Required, Outlet...

It’s based on a ESP8266-S3 ( which is the one made for slotted PCB I believe ).

After reading this page :

Teckin SP32 on ESPHome

Quindor has excellent guide for using $10 WiFi plugs for energy monitoring over on his blog intermit.tech . I ordered 6 of them from Amazon UK but what I received was a slightly different model, the Teckin SP23. These unit run Tuya and need to be converted, but he details the process very well. However, after flashing them with ESPHome, they barely worked so obviously the internal configuration has changed. After a bit of researh, I got almost everything working except for the red LED, so perha…

I have tweaked it to add the ESP blue led and the proper red led integration.

Enjoy

#Configuration for EFUN SH3331W Smart Plug

substitutions:
  plug_name: esun_plug
  # Higher value gives lower watt readout
  current_res: "0.00221"
  # Lower value gives lower voltage readout
  voltage_div: "940"

esphome:
  name: ${plug_name}
  platform: ESP8266
  board: esp01_1m


wifi:
  ssid: "SSID"
  password: "PASS"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esun Plug Fallback Hotspot"
    password: "1J01nevV4P5p"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: "PASS"

ota:
  password: "PASS"

time:
  - platform: homeassistant
    id: homeassistant_time
    
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      inverted: True
    name: "${plug_name}_button"
    on_press:
      then:
        - switch.toggle: "${plug_name}_Relay"
        - switch.toggle: "${plug_name}_LED_Blue"

switch:
  - platform: gpio
    name: "${plug_name}_Relay"
    id: "${plug_name}_Relay"
    pin: GPIO15
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Blue"
    id: "${plug_name}_LED_Blue"
    pin: GPIO2
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_ESP_LED"
    pin: GPIO4
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Red"
    pin: GPIO0
    inverted: True
    restore_mode: ALWAYS_OFF

sensor:
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: True
    cf_pin: GPIO05
    cf1_pin: GPIO14
    current_resistor: ${current_res}
    voltage_divider: ${voltage_div}
    current:
      name: "${plug_name}_Amperage"
      unit_of_measurement: A
    voltage:
      name: "${plug_name}_Voltage"
      unit_of_measurement: V
    power:
      name: "${plug_name}_Wattage"
      unit_of_measurement: W
      id: "${plug_name}_Wattage"
    change_mode_every: 8
    update_interval: 10s
  - platform: total_daily_energy
    name: "${plug_name}_Total Daily Energy"
    power_id: "${plug_name}_Wattage"
    filters:
        # Multiplication factor from W to kW is 0.001
        - multiply: 0.001
    unit_of_measurement: kWh

# Extra sensor to keep track of plug uptime
  - platform: uptime
    name: ${plug_name}_Uptime Sensor

[danhiking (Daniel)]

Thanks for the config! Replying here in Dec 2020 to say Tuya convert still works on some recently bought SH331-s from Amazon.

Any suggestions how best to calibrate a device when given known current and power are measured at multiple points?

[Eriobis (Simon Benoit)]

I only see the config for a gain (multiplier ) in the current setup.
I don’t know where this value comes from. Do you have data on the current curve ?
( At this moment the plug is used to monitor the christmas tree, so the current consumption isn’t that important )

For reference if you need to hack the plug and remove the whole back :

EFUN SH331W plug back cover by Eriobis

[danhiking (Daniel)]

I’m trying to calibrate with a 30W soldering iron that has a rock-solid 30W resistive load that produces a power factor of 1.00.

Yet the numbers coming out the SH331 don’t seem to make sense!

• amperage: 0.145 A
• voltage: 133 V
• wattage: 33.9 W

But 133 V * 0.145 A = 19.3 VA, which is way off the wattage for a resistive load. Any idea what could be going on?

By adjusting current_resistor and voltage_divider I could calibrate two of the three quantities, but not all three. The power and voltage (or current) are computed separately: https://github.com/esphome/esphome/blob/ac15ce576b1c22e59a7186014de0202e79de959b/esphome/components/hlw8012/hlw8012.cpp#L55

Could there be anything else different in these chips that might need tweaking?

Note: The HLW8012 library that Esphome links to has apparently separate multipliers for the three quantities: https://github.com/xoseperez/hlw8012/blob/2dace562c339e77a2889446d461e8e56048fe634/src/HLW8012.cpp#L153

[Clayton (Clayton Ross)]

hello all, I have 8 of these I was able to tuya convert, trying to get this config on them but I am getting errors. i am wondering of something changed in esp syntax or maybe it’s just me , I could not YAML my way out of a paper sack

I am getting Dashes are not supported in IDs,

thanks for the help

full config

#Configuration for EFUN SH3331W Smart Plug

substitutions:
  plug_name: efun-01
  # Higher value gives lower watt readout
  current_res: "0.00221"
  # Lower value gives lower voltage readout
  voltage_div: "940"

esphome:
  name: ${plug_name}
  platform: ESP8266
  board: esp01_1m


wifi:
  ssid: "ClanOfRoss"
  password: "megahugeboners"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Efun-01 Fallback Hotspot"
    password: "3doors3whores"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: "PASS"

ota:
  password: "PASS"

time:
  - platform: homeassistant
    id: homeassistant_time
    
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      inverted: True
    name: "${plug_name}_button"
    on_press:
      then:
        - switch.toggle: "${plug_name}_Relay"
        - switch.toggle: "${plug_name}_LED_Blue"

switch:
  - platform: gpio
    name: "${plug_name}_Relay"
    id: "${plug_name}_Relay"
    pin: GPIO15
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Blue"
    id: "${plug_name}_LED_Blue"
    pin: GPIO2
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_ESP_LED"
    pin: GPIO4
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Red"
    pin: GPIO0
    inverted: True
    restore_mode: ALWAYS_OFF

sensor:
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: True
    cf_pin: GPIO05
    cf1_pin: GPIO14
    current_resistor: ${current_res}
    voltage_divider: ${voltage_div}
    current:
      name: "${plug_name}_Amperage"
      unit_of_measurement: A
    voltage:
      name: "${plug_name}_Voltage"
      unit_of_measurement: V
    power:
      name: "${plug_name}_Wattage"
      unit_of_measurement: W
      id: "${plug_name}_Wattage"
    change_mode_every: 8
    update_interval: 10s
  - platform: total_daily_energy
    name: "${plug_name}_Total Daily Energy"
    power_id: "${plug_name}_Wattage"
    filters:
        # Multiplication factor from W to kW is 0.001
        - multiply: 0.001
    unit_of_measurement: kWh

# Extra sensor to keep track of plug uptime
  - platform: uptime
    name: ${plug_name}_Uptime Sensor

[danhiking (Daniel)]

Hi Clayton,

FWIW I haven’t changed the YAML config in ~ year, and still seems to be working. Just to confirm that things are still working, I include my yaml here for reference:

# EFUN SH331

substitutions:
  plug_name: efun_01
  # Higher value gives lower watt readout
  current_res: "0.00221"
  # Lower value gives lower voltage readout
  voltage_div: "940"

esphome:
  name: ${plug_name}
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Efun Fallback Hotspot"
    password: !secret fallback_password

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

time:
  - platform: homeassistant
    id: homeassistant_time
    
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      inverted: True
    name: "${plug_name}_button"
    on_press:
      then:
        - switch.toggle: "${plug_name}_Relay"
        - switch.toggle: "${plug_name}_LED_Blue"

switch:
  - platform: gpio
    name: "${plug_name}_Relay"
    id: "${plug_name}_Relay"
    pin: GPIO15
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Blue"
    id: "${plug_name}_LED_Blue"
    pin: GPIO2
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_ESP_LED"
    pin: GPIO4
    inverted: True
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "${plug_name}_LED_Red"
    pin: GPIO0
    inverted: True
    restore_mode: ALWAYS_OFF

web_server:

sensor:
  - platform: hlw8012
    sel_pin:
      number: GPIO12
      inverted: True
    cf_pin: GPIO05
    cf1_pin: GPIO14
    current_resistor: ${current_res}
    voltage_divider: ${voltage_div}
    current:
      name: "${plug_name}_Amperage"
      unit_of_measurement: A
    voltage:
      name: "${plug_name}_Voltage"
      unit_of_measurement: V
    power:
      name: "${plug_name}_Wattage"
      unit_of_measurement: W
      id: "${plug_name}_Wattage"
    change_mode_every: 8
    update_interval: 10s
  - platform: total_daily_energy
    name: "${plug_name}_Total Daily Energy"
    power_id: "${plug_name}_Wattage"
    filters:
        # Multiplication factor from W to kW is 0.001
        - multiply: 0.001
    unit_of_measurement: kWh

  # Extra sensor to keep track of plug uptime
  - platform: uptime
    name: ${plug_name}_Uptime Sensor