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Dewenwils Heavy Duty 40A Outdoor Plug (HOWT01A & TM-050B)

Dewenwils Heavy Duty 40A Outdoor Plug (HOWT01A & TM-050B)

Device Type: switch
Electrical Standard: us
Board: esp8266
Difficulty: Soldering required, 4/5

Amazon Link

Dewenwils Heavy Duty 40A Outdoor Plug (HOWT01A & TM-050B)

The device has 2 indicator LEDs, 1 power button, 1 reset button and 1 controllable double pole relay. The device is controlled by a ESP8266 that is from ECO-PLUGS, and the FCC filing can be found here. The device uses a Proprietary app that cannot be flashed to ESPHome OTA, the initial install must be USB to Serial. Once ESPHome is installed all future downloads can be OTA.

Product Image

HOWT01A

GPIO Pinout

The GPIO pinout was learned from NorthernMan54 and Tasmota documentation. HOWT01AGPIO

The GPIOs being used are:

  • Button: GPIO13
  • Relay1: GPIO15
  • Blue LED: GPIO02

Enter Flash Mode

In order to get the ESP chip into flash mode I did the following: Hold GPIO0 to ground, then apply power. My connections were soldered, so I left GPIO0 connected to ground for the duration of the flash. Once log showed a successful flash I removed the GPIO0, TX and RX pins and rebooted device.

Basic Configuration

esphome:
  name: ecoplug
  friendly_name: EcoPlug


esp8266:
  board: esp01_1m


# Enable logging
logger:


# Enable Home Assistant API
api:
  encryption:
    key: !secret


ota:
  platform: esphome
  password: !secret


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


  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "$proper_devicename Hotspot"
    password: !secret ap_password
sensor:
  - platform: wifi_signal
    name: "Wifi Signal"
    update_interval: 120s
    entity_category: "Diagnostic"


binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
    id: button
    on_press:
     - switch.toggle: relay1


  - platform: status
    name: Eco Plug
    entity_category: "Diagnostic"


text_sensor:
  - platform: version
    name: "Firmware Version"
    entity_category: "Diagnostic"


switch:
  - platform: gpio
    name: "Eco Plug 1"
    pin: GPIO15
    id: relay1
    icon: "mdi:power-socket-us"


output:
  - platform: gpio
    id: blue_led
    pin: GPIO02
    inverted: true


interval:
  - interval: 1s
    then:
     if:
       condition:
         wifi.connected:
       then:
         - output.turn_on: blue_led
       else:  #blinks if wi-fi isn't connected
         - output.turn_on: blue_led
         - delay: 500ms
         - output.turn_off: blue_led


captive_portal:
# Example configuration entry
web_server:
  port: 80
  version: 1
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