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TomZN TOB9-VAP

TomZN TOB9-VAP

Device Type: misc
Electrical Standard: global
Board: bk72xx
Difficulty: Disassembly required, 3/5

Notes

  • Uses BL0942 for energy monitoring, which requires calibration
  • Does not use a relay for controlling the output, it uses a bridge whose position can be toggled by pulsing GPIO24 and GPIO26

Product images

device

board

Programming

Tuya Cloudcutter was not able to work for this device (with firmware v1.0.15). If your device has an older firmware, it may be worth a try.

This device is powered by a CBU board (BK7231N), you can read LibreTiny's instructions on how to flash it.

Disassembling this device is simple, provided you find a way to remove the golden tubes. Here is one way:

disassembling

GPIO Pinout

PinFunctionNotes
GPIO09Red LEDinverted
GPIO10RX for BL0942RX1
GPIO11TX for BL0942TX1
GPIO15Blue LED (status)inverted
GPIO17Buttoninverted
GPIO24Bridge forwardpulse
GPIO26Bridge reversepulse

Basic Configuration

esphome:
  name: TomZN.TOB9-VAP


bk72xx:
  board: cbu


logger:


captive_portal:


uart:
  tx_pin: TX1
  rx_pin: RX1
  baud_rate: 4800
  stop_bits: 1


binary_sensor:
  - platform: gpio
    id: power_button
    pin:
      number: 17
      inverted: true
      mode: INPUT_PULLUP
    on_multi_click:
      - timing:
          - ON for at most 1s
          - OFF for at least 0.2s
        then:
          switch.toggle: main_switch
      - timing:
          - ON for at least 4s
        then:
          button.press: reset


output:
  - platform: gpio
    id: red_led_output
    pin: GPIO9
    inverted: true


light:
  - platform: status_led
    id: blue_led
    pin:
      inverted: true
      number: GPIO15
  - platform: binary
    id: red_led
    output: red_led_output
    restore_mode: ALWAYS_OFF


switch:
  - platform: gpio
    id: bridge_forward
    pin: GPIO24
    restore_mode: ALWAYS_OFF
    on_turn_on:
      - switch.template.publish:
          id: main_switch
          state: ON
      - light.turn_on: red_led
      - delay: 200ms
      - switch.turn_off: bridge_forward


  - platform: gpio
    id: bridge_reverse
    pin: GPIO26
    restore_mode: ALWAYS_OFF
    on_turn_on:
      - switch.template.publish:
          id: main_switch
          state: OFF
      - light.turn_off: red_led
      - delay: 200ms
      - switch.turn_off: bridge_reverse


  - platform: template
    name: Switch
    id: main_switch
    device_class: outlet
    restore_mode: ALWAYS_OFF
    turn_on_action:
      switch.turn_on: bridge_forward
    turn_off_action:
      switch.turn_on: bridge_reverse


sensor:
  - platform: bl0942
    line_frequency: 50Hz
    update_interval: 10s
    current:
      name: Current
      filters:
        # The chip reports some current even when there is no load
        - lambda: if (x < 0.02) return 0.0; else return x;
    voltage:
      name: Voltage
    power:
      name: Power
      filters:
        # The chip reports some power even when there is no load
        - lambda: if (x < 0.5) return 0.0; else return x;
    energy:
      name: Energy
      unit_of_measurement: kWh
    frequency:
      name: Frequency
      accuracy_decimals: 2
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