Arduino Sound Monitor

Here is a guide to making a sound monitor that sends a text when your volume threshold has been reached.

This design uses an LCD, an Arduino Microphone module, esp8266-01, Arduino Mega, a buzzer, and some LCD's. This project is theoretically used as a baby monitor.

Step 1: Assemble Materials

Assemble materials.

Materials needed:

Arduino Mega2560

Jumper Wires

Male to female wires

LED x 2 Resistor x 3 (5.1k resistor, 10k resistor, 220 resistor)

Buzzer LCD 16x2

esp8266-01

USB cable connection

10k potentiometer

Push button(optional)

Microphone Sound detector module

Step 2: Connecting LCD to Arduino

The picture is not completely accurate because it is using an Arduino Uno.

In my project I used an Arduino Mega which has 4 serial pins. The object in the diagram is not a microphone, however I used its three pins to connect to A0, GND, and 5v.

Connections:

LCD:

VSS---GND

VDD---5v

V0--- Wiper(potentiometer)

RS--- Digital 9

RW--- GND

E--- Digital 8

D4--- Digital 5

D5--- Digital 4

D6--- Digital 3

D7--- Digital 2

A---resistor(5v)

K---GND

Step 3: Connecting Esp8266 to Arduino

Esp8266:

tx---rx

rx---tx

Gnd---Gnd

vcc---3.3v

ch-pd---3.3v

Step 4: Assembling Microphone Module

A0---A0

GND---GND

+---5v

Step 5: Code

Attached is the code for the final working project.

When connecting the esp8266 to the internet use AT commands.
AT+CJAP="wifi name","wifi pswd"

AT+CIPSEND= Character length+2

In my code you will see I have my username and password for smtp2go encoded in base 64.

Enjoy!