惠桔和家亲X1S智能插座目前(2024-04)在闲鱼上卖15元一个，5个包邮，性价比挺高。该插座带电量统计功能，原使用和家亲APP控制。

插座使用胶水粘合，只能强行破拆，用螺丝刀或者撬棍从缝隙插入慢慢撬。主控模块是tuya CB2S，CB2S内部芯片是BK7231M，计量芯片是BL0937。

BK7231N和BK7231T都可以直接刷入esphome，而BK7231M似乎还没有方法刷入esphome，那只能用替换大法了，我是用ESP-02S这个模块来替换，这个模块的外形、尺寸和CB2S完全一样，这个模块内部芯片是esp8285，和esp8266相似，目前淘宝的价格是5.x元，邮费5.x元。

更换模块需要将电路板拆出来，要注意一个，拆电路板需要焊掉这两个焊点：

先给ESP-02S模块刷好固件，再将模块焊接进去。

esphome代码：

esphome:
  name: "esphome-x1s-mod"
  friendly_name: "ESPHome_x1s-mod"

esp8266:
  board: esp8285
  restore_from_flash: true

substitutions:
  # 非常重要！！这里要校准，见文章说明！！
  voltage_divider: "2351"
  current_resistor: "0.001"
  current_multiply: "1"

preferences:
  flash_write_interval: 10s

# Enable logging
logger:
  baud_rate: 0

# Enable Home Assistant API
api:
  encryption:
    key: "改你自己的"

ota:
  password: "改你自己的"

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esphome-x1s-mod Fallback Hotspot"
    password: "改你自己的"

captive_portal:
    
web_server:

status_led:
  pin:
    number: TX
    inverted: True

output:
  - platform: gpio
    id: led1
    pin:
      number: RX
      inverted: True

switch:
  - platform: gpio
    pin: GPIO13
    name: "Relay"
    id: relay1
    restore_mode: RESTORE_DEFAULT_OFF
#    RESTORE_DEFAULT_OFF  RESTORE_DEFAULT_ON  ALWAYS_OFF  ALWAYS_ON
    on_turn_on:
      - output.turn_on: led1
    on_turn_off:
      - output.turn_off: led1

binary_sensor:
 - platform: gpio
   pin: GPIO12
   name: "Switch"
   filters:
     - delayed_on_off: 100ms
   on_press:
     then:
       - switch.toggle: relay1

sensor:
  - platform: hlw8012
    model: BL0937
    current_resistor: ${current_resistor}
    voltage_divider: ${voltage_divider}
    
    sel_pin:
      number: GPIO14
      inverted: true

    cf_pin:
      number: GPIO5
      inverted: true

    cf1_pin:
      number: GPIO4
      inverted: true

    current:
      name: "Current"
      accuracy_decimals: 3
      filters:
          - multiply: ${current_multiply}
    voltage:
      name: "Voltage"
      accuracy_decimals: 2
    power:
      name: "Power"
      id: my_power
      accuracy_decimals: 2
    energy:
      name: "Energy"
      accuracy_decimals: 2

    update_interval: 2s

  - platform: total_daily_energy
    name: "Daily Energy"
    power_id: my_power
    accuracy_decimals: 2

  - platform: wifi_signal
    name: "WiFi Signal"
    update_interval: 10s

  - platform: uptime
    name: Uptime
    update_interval: 10s

替换模块后的样子：

然后还有一件很重要的事情是校准BL0937芯片的计量，才能让电压、电流、功率等正确显示，可以参考esphome官方的校准方法 https://esphome.io/components/sensor/hlw8012.html

如果你不想校准，可以试试我的校准参数，不保证能用。

将代码里的：

  voltage_divider: "2351"
  current_resistor: "0.001"
  current_multiply: "1"

改成:

  voltage_divider: "1578.5763"
  current_resistor: "0.001072"
  current_multiply: "0.8539"

在 esphome 里面显示的样子：