There are some cool USB powered devices that are a lot of fun for a kid’s room… But it’s not always great to leave them on all the time. This WiFi USB Switch is a low-cost way to integrate such devices into Home Assistant. This is an extension of the Kids Room Light Remote Control project.
The transformer for Single Line Art Electroluminescent Light that I made for my daughter’s room has a USB connection. EL-Wire degrades as it runs so leaving it on all the time limits the lifespan. The Sinilink XY-WFUSB sits between the USB power supply and the EL-Wire transformer.
References:
Wiring:
Flashing is pretty straight forward. The serial pads have a 1.27mm pitch, so using a 1.27mm to 2.54mm Pitch Adapter Board – 10pin Single row from Aliexpress with 4 of the pins cut makes connecting a lot easier.
ESPHome Configuration:
The ESPHome code on ESPHome Devices or the linked Home Assistant Community post is more complex than I needed. I’m trying to make the configuration as simple as possible, so here’s my stripped down configuration.
esphome:
name: sinilink-switch
friendly_name: sinilink-switch
esp8266:
board: esp01_1m
framework:
version: recommended
# Enable logging
logger:
# Enable Home Assistant API
api:
encryption:
key: !secret encryption_key
ota:
- platform: esphome
password: !secret ota_password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "sinilink-switch"
password: !secret fallback_password
web_server:
port: 80
status_led:
pin:
number: 16 # Blue LED
switch:
- platform: gpio
pin: 14
id: green_led
inverted: false
internal: true
- platform: gpio
id: port_power
name: "Port Power"
pin: 5
on_turn_on:
- lambda: |-
id(green_led).turn_on();
on_turn_off:
- lambda: |-
id(green_led).turn_off();
binary_sensor:
# Button
- platform: gpio
id: btn
internal: true
pin:
number: 4
inverted: true
mode:
input: true
pullup: true
on_press:
- switch.toggle: port_power
button:
- platform: restart
name: "Restart"
entity_category: diagnostic
Raging Computer 