Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates an ESP32 microcontroller with various sensors and output devices. The circuit includes a GPS module, a vibration sensor, an LCD display, LEDs, a piezo buzzer, and a power source. The ESP32 is programmed to read data from the GPS module and display it on the LCD.

Component List

1. ESP32 (30 pin)

   • Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

2. SW-420 Vibration Sensor

   • Description: A sensor that detects vibrations and outputs a digital signal.
   • Pins: vcc, Ground, Digital output

3. 16X2 LCD

   • Description: A 16x2 character LCD display.
   • Pins: VSS, VDD, V0, RS, RW, E, D1, D0, D2, D3, D4, D6, D5, D7, A, K

4. LCM1602 IIC

   • Description: An I2C interface for the 16x2 LCD display.
   • Pins: GND, VCC, SDA, SCL, D6, D7, A, K, VSS, VDD, V0, RS, D2, D3, D4, D5, RW, E, D0, D1, LED_A, LED_B

5. GPS NEO 6M

   • Description: A GPS module for receiving location data.
   • Pins: VCC, RX, TX, GND

6. Piezo Buzzer

   • Description: A buzzer that produces sound when a voltage is applied.
   • Pins: pin 1, pin 2

7. Resistor (100 Ohms)

   • Description: A resistor with a resistance of 100 Ohms.
   • Pins: pin1, pin2

8. LED: Two Pin (blue)

   • Description: A blue LED.
   • Pins: cathode, anode

9. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: cathode, anode

10. 3.7v LiPo

    • Description: A 3.7V Lithium Polymer battery.
    • Pins: +Ve, GND

Wiring Details

ESP32 (30 pin)

• GND: Connected to GND of LCM1602 IIC, GND of 3.7v LiPo, GND of SW-420 Vibration Sensor, GND of GPS NEO 6M, GND of Piezo Buzzer, cathode of LED: Two Pin (red), and cathode of LED: Two Pin (blue).
• Vin: Connected to VCC of LCM1602 IIC and +Ve of 3.7v LiPo.
• D23: Connected to pin 1 of Piezo Buzzer.
• D22: Connected to SCL of LCM1602 IIC.
• D21: Connected to SDA of LCM1602 IIC.
• TX2: Connected to RX of GPS NEO 6M.
• RX2: Connected to TX of GPS NEO 6M.
• D4: Connected to pin2 of Resistor (100 Ohms).
• D2: Connected to pin2 of another Resistor (100 Ohms).
• D15: Connected to Digital output of SW-420 Vibration Sensor.
• 3V3: Connected to vcc of SW-420 Vibration Sensor and VCC of GPS NEO 6M.

SW-420 Vibration Sensor

• vcc: Connected to 3V3 of ESP32.
• Ground: Connected to GND of ESP32.
• Digital output: Connected to D15 of ESP32.

16X2 LCD

• VSS: Connected to VSS of LCM1602 IIC.
• VDD: Connected to VDD of LCM1602 IIC.
• V0: Connected to V0 of LCM1602 IIC.
• RS: Connected to RS of LCM1602 IIC.
• RW: Connected to RW of LCM1602 IIC.
• E: Connected to E of LCM1602 IIC.
• D1: Connected to D1 of LCM1602 IIC.
• D0: Connected to D0 of LCM1602 IIC.
• D2: Connected to D2 of LCM1602 IIC.
• D3: Connected to D3 of LCM1602 IIC.
• D4: Connected to D4 of LCM1602 IIC.
• D6: Connected to D6 of LCM1602 IIC.
• D5: Connected to D5 of LCM1602 IIC.
• D7: Connected to D7 of LCM1602 IIC.
• A: Connected to A of LCM1602 IIC.
• K: Connected to K of LCM1602 IIC.

LCM1602 IIC

• GND: Connected to GND of ESP32 and GND of 3.7v LiPo.
• VCC: Connected to Vin of ESP32 and +Ve of 3.7v LiPo.
• SDA: Connected to D21 of ESP32.
• SCL: Connected to D22 of ESP32.
• VSS: Connected to VSS of 16X2 LCD.
• VDD: Connected to VDD of 16X2 LCD.
• V0: Connected to V0 of 16X2 LCD.
• RS: Connected to RS of 16X2 LCD.
• RW: Connected to RW of 16X2 LCD.
• E: Connected to E of 16X2 LCD.
• D1: Connected to D1 of 16X2 LCD.
• D0: Connected to D0 of 16X2 LCD.
• D2: Connected to D2 of 16X2 LCD.
• D3: Connected to D3 of 16X2 LCD.
• D4: Connected to D4 of 16X2 LCD.
• D6: Connected to D6 of 16X2 LCD.
• D5: Connected to D5 of 16X2 LCD.
• D7: Connected to D7 of 16X2 LCD.
• A: Connected to A of 16X2 LCD.
• K: Connected to K of 16X2 LCD.
• LED_A: Connected to LED_B of LCM1602 IIC.

GPS NEO 6M

• VCC: Connected to 3V3 of ESP32.
• RX: Connected to TX2 of ESP32.
• TX: Connected to RX2 of ESP32.
• GND: Connected to GND of ESP32.

Piezo Buzzer

• pin 1: Connected to D23 of ESP32.
• pin 2: Connected to GND of ESP32.

Resistor (100 Ohms)

• pin1: Connected to anode of LED: Two Pin (red).
• pin2: Connected to D4 of ESP32.

Resistor (100 Ohms)

• pin1: Connected to anode of LED: Two Pin (blue).
• pin2: Connected to D2 of ESP32.

LED: Two Pin (blue)

• cathode: Connected to GND of ESP32.
• anode: Connected to pin1 of Resistor (100 Ohms).

LED: Two Pin (red)

• cathode: Connected to GND of ESP32.
• anode: Connected to pin1 of Resistor (100 Ohms).

3.7v LiPo

• +Ve: Connected to Vin of ESP32 and VCC of LCM1602 IIC.
• GND: Connected to GND of ESP32 and GND of LCM1602 IIC.

Code Documentation

ESP32 Code

#include <TinyGPS++.h>
#include <TinyGPSPlus.h>

#define GPS_BAUDRATE 9600  // The default baudrate of NEO-6M is 9600

TinyGPSPlus gps;  // the TinyGPS++ object

void setup() {
  Serial.begin(9600);
  Serial2.begin(GPS_BAUDRATE); // serial2 for GPS UART

  Serial.println(F("ESP32 -