Saucier’s Sentinel - Hot Process Timer

## Saucier’s Sentinel — Hot Process Timer

*A chef‑friendly IoT device for perfect hot‑process sauce making.*

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## Introduction

Introducing the **Saucier’s Sentinel**, a tiny sous‑chef that watches your sauce

like a hawk — measuring temperature, displaying boiling temp from altitude,

and alerting you, along with a fun OLED UI.

This project blends:

• embedded engineering
• physics
• kitchen craft
• and IoT objects

## How It Works

### Sensors

• MAX6675 thermocouple amplifier
• BME280 pressure sensor
• SSD1306 OLED display

### Logic

• State machine
• Local boiling‑point calculation
• Single‑button interface

### Alerts

• Philips Hue bulbs
• Wemo smart plugs
• On‑screen animations
• LED blink

## Enclosure

Designed in Onshape with:

• slanted front
• OLED window
• button recess
• thermocouple exit
• internal mounting bosses
• and a giant button for elbow hits in the kitchen

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## Firmware

Key features:

• non‑blocking timers
• debounced button logic
• animated OLED UI
• smart‑home integration
• boiling‑point physics

case SCREEN_CYCLE_IN_PROGRESS:
    if (cycleTimer.isTimerReady()) {
        currentScreen = SCREEN_SUCCESS;
        break;
    }
    if (tempF < TEMP_SAFE_LOW)  currentScreen = SCREEN_ALERT_LOW;
    if (tempF > TEMP_SAFE_HIGH) currentScreen = SCREEN_ALERT_HIGH;
    if (wasCancelHeld()) {
        cancelTimer.startTimer(CANCEL_MS);
        currentScreen = SCREEN_CANCELLING;
    }
    break;

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## Build Photos

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## Testing

• Verified boiling‑point calculation
• Verified cycle timing
• Verified alert transitions
• Verified cancel behavior
• Verified OLED animations

## Final Thoughts

This device was built for Chef with a hot sauce making dream —

and it was a fun blend of engineering and culinary craft to make it.

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