# Tiva C + ESP32 LCD Keypad Project

This project implements a sensor monitoring system using:

- Tiva C (TM4C123GH6PM)

- ESP32 sensor node

- 16x2 LCD in 8-bit mode

- 4x4 keypad

- UART communication (9600 baud)

## Features

- UART communication between ESP32 and Tiva C

- CSV-based sensor data transfer

- LCD display with multiple modes

- Keypad-controlled screen navigation

- Water-level alert logic

- Debug output via UART0 (PuTTY)

## Hardware Interfaces

- UART0: Debug to PC

- UART1: ESP32 → Tiva data link

- LCD: 8-bit parallel interface

- Keypad: 4x4 matrix scanning

## Notes

The LCD initializes correctly and displays static content.

Dynamic second-line updates may show corrupted characters due to hardware timing/noise limitations;

system logic and communication are fully functional and verified via UART debug output.

## Brief Pinout Diagram

ESP32 PINOUT:

Sensors:

GPIO4 --> DHT11 Temp & Humidity

GPIO34 --> Photoresistor Light Sensor

GPIO16 --> Ultrasonic Trigger

GPIO35 --> Ultrasonic Echo

UART to Tiva:

TX2 GPIO26 --> TIVA PB0 (U1RX)

TIVA C PINOUT:

ESP32:

PB0 --> GPIO26 TX2

LCD Screen:

PA5 --> RS

PA6 --> E

PE1-4 --> D0-3

PB4-7 --> D4-7

Keypad:

R1-4 --> PD0-3

C1-4 --> PC4-7

## Author

David Leal