ESP32 Watering System (Rust + ESP-IDF)

This is a Rust-based firmware project for an automatic watering system using an ESP32 microcontroller. It uses an RTC (DS3231) and an I2C LCD display (HD44780) to display current date/time and control a water pump on schedule or via a button press.

Features

• Scheduled automatic watering (e.g., every day at 10:00)
• Manual watering via button
• LCD display showing date, time, and pump state
• Watchdog timer to reset on software hang
• Built with esp-idf-hal and esp-idf-svc

Requirements

• Rust toolchain for ESP32 installed via espup
• just command runner
• espflash for flashing firmware to ESP32

Setup

1. Install Rust and ESP32 support:

   curl -sSL https://github.com/esp-rs/espup/releases/latest/download/espup-init.sh | bash
   source $HOME/export-esp.sh

2. Install required tools:

   cargo install just espflash

Usage

List available ports and available commands

just

Build the firmware

just build

Flash the firmware

just build flash PORT='/dev/ttyUSBXX'