IoT Button Clicker

Team

Brad Ling, Michael McCulloch, Tijmen Sep

Overview

This is a device that allows the user to remotely push a physical button by controlling a solenoid actuator over the internet.

Description

The Button Clicker is powered by a LiPo battery and controlled by an ESP32 microcontroller. The ESP32's HTML server enables the user to remotely "push" the solenoid. By mounting the device near a button on a "dumb" appliance, the user can use it to remotely push that button to start the appliance or activate a certain function.

Features

Power:

• USB-C 2.0, provides 5V 1A

• Power path management and battery charging with MCP73871-2CCI/ML IC

• Battery Power with Turnigy Nano-Tech Plus 750mAh 1S 70C Lipo Pack

• Provides 3.3V to ESP32 Microcontroller and 4.2V to Solenoid

• Charging LED

• Uses Linear Regulator to transition 4.2V into 3.3V for ESP32

Control:

• ESP32 microcontroller

  • Remote control via HTML webpage over WLAN

  • Matter compatibility in development

  • Drives RGB LEDs via PWM

  • DAC directly drives the piezoelectric buzzer

  • Provides signal to trigger the solenoid

Actuation:

• DSOS-0416-03D Solenoid Actuator

• Buzzer for audio cue of actuation

• Uses NMOS as current controlled switch to activate Solenoid

Schematic