ATTiny85 Sensor Alert Code

I’m building a tiny monitoring node around an ATTiny85 that has only four external components: a single LED, an NTC thermistor, a Hall-effect sensor and a piezo buzzer. I need clean, memory-efficient Arduino-style C/C++ code that:

• Samples the thermistor, converts the reading to temperature and classifies it into three adjustable ranges.
• Drives the lone LED so the user can tell at a glance which range we’re in (for instance OFF below the first threshold, slow blink in the middle, fast blink above the second threshold—but I’m open to any pattern that is easy to recognise).
• Activates the buzzer whenever the temperature crosses the high-temperature limit and keeps it on until the reading falls back below that limit.
• Reads and debounces the Hall sensor; for now I just want the value stored in a variable so I can expand the logic later.

Please target the ATTinyCore package in the Arduino IDE, avoid blocking delays, and base timing on millis(). Put every pin assignment, thermistor constant and threshold at the top of the sketch as #define or const so I can tweak values without digging through the logic.

Deliverables
• A fully commented .ino (or .c/.h) file ready to compile and flash
• A short pin map / wiring note and any library references if you choose to use one

I’ll flash the code to real hardware; the job is done when the LED accurately reflects temperature ranges and the buzzer responds to high-temperature events while the sketch still fits comfortably in ATTiny85 memory.