https://github.com/hobbyquaker/wifi-usb-relay

Simple Wi-Fi relay with USB-C in and USB-A out
https://github.com/hobbyquaker/wifi-usb-relay

esp8266 esphome iot relay smarthome wifi

Last synced: about 3 hours ago
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Simple Wi-Fi relay with USB-C in and USB-A out

• Host: GitHub
• URL: https://github.com/hobbyquaker/wifi-usb-relay
• Owner: hobbyquaker
• Created: 2024-01-14T10:12:02.000Z (10 months ago)
• Default Branch: master
• Last Pushed: 2024-01-14T10:16:16.000Z (10 months ago)
• Last Synced: 2024-04-14T06:29:28.498Z (7 months ago)
• Topics: esp8266, esphome, iot, relay, smarthome, wifi
• Homepage:
• Size: 14.8 MB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# USB Relay

Simple 5V 2A Wi-Fi Relay with USB-C in and USB-A out. I'm using this to integrate decorative lights into a 

smart home environment, perhaps of interest for beginners as simple ESPHome and Fusion360 example project.

![case3.jpg](img%2Fcase3.jpg)

## BOM

* 1x USB-C female breakout

  https://de.aliexpress.com/item/1005005187670446.html

* 1x USB-A female breakout

  https://de.aliexpress.com/item/32983983188.html

* 1x AMS1117 3.3V regulator module

  https://de.aliexpress.com/item/1005005911922207.html

* 1x ESP-01S ESP8266 module

  https://de.aliexpress.com/item/1005006174109128.html

* 1x 2x4P female header socket

  https://www.aliexpress.com/item/1005001781173114.html

* 1x 5V DC relay

  https://de.aliexpress.com/item/1005004384333385.html

* 1x 3x7 double-sided prototyping PCB

  https://de.aliexpress.com/item/1005003384352824.html

* 1x 2N7000 N-channel MOSFET

  https://de.aliexpress.com/item/1005005945696455.html

* 1x 1N4148 diode

  https://de.aliexpress.com/item/1005006127068810.html

* 1x 100k resistor

* 1x 6x6x15 mini push button

  https://de.aliexpress.com/item/32912263133.html

* 4x 2x8 screw

  https://www.aliexpress.com/item/1005002322813833.html

* 4x 6x2mm rubber feet

  https://www.aliexpress.com/item/1005004068119765.html

## Schematic

![schematic.jpg](img%2Fschematic.jpg)

## PCB

![pcb3.jpg](img%2Fpcb3.jpg)

![pcb1.jpg](img%2Fpcb1.jpg)

![pcb2.jpg](img%2Fpcb2.jpg)

![pcb-wiring.jpg](img%2Fpcb-wiring.jpg)

## 3D printed case

![fusion.png](img%2Ffusion.png)

![case1.jpg](img%2Fcase1.jpg)

![case2.jpg](img%2Fcase2.jpg)

* Fusion 360 Archive: [usb-relay.f3d](cad%2Fusb-relay.f3d)

 

* [usb-relay-case.stl](cad%2Fusb-relay-case.stl)

* [usb-relay-lid.stl](cad%2Fusb-relay-lid.stl)

* [usb-relay-button.stl](cad%2Fusb-relay-button.stl)

## ESPHome

For initial programming, I used this adapter: https://de.aliexpress.com/item/1005003396937959.html

```yaml

esphome:

  name: usb-relay-02

  friendly_name: usb-relay-02

esp8266:

  board: esp01_1m

# Enable logging

logger:

# Enable Home Assistant API

api:

ota:

  password: "ef468b5d3eac4c58444d9c30628206c0"

wifi:

  ssid: !secret wifi_ssid

  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails

  ap:

    ssid: "Usb-Relay-02 Fallback Hotspot"

    password: "YR4r1ClyDioP"

captive_portal:

mqtt:

  broker: mqtt.lan

switch:

  - platform: gpio

    name: "relay"

    id: relay

    pin: 1

    inverted: True

    restore_mode: ALWAYS_OFF

binary_sensor:

  - platform: gpio

    name: button

    id: button

    pin:

      number: 2

      mode: INPUT_PULLUP

      inverted: True

    on_press:

      then:

        - switch.toggle: relay

```

## License

This is free and unencumbered software and data released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or

distribute this software, either in source code form or as a compiled

binary, for any purpose, commercial or non-commercial, and by any

means.

In jurisdictions that recognize copyright laws, the author or authors

of this software dedicate any and all copyright interest in the

software to the public domain. We make this dedication for the benefit

of the public at large and to the detriment of our heirs and

successors. We intend this dedication to be an overt act of

relinquishment in perpetuity of all present and future rights to this

software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR

OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to