1.0 1. System Overview

This project is an open-source alternative to commercial air-based adjustable firmness beds (such as Sleep Number), built using affordable, off-the-shelf components.

Why this exists

This system addresses two common problems:

• inexpensive air mattresses gradually lose air, resulting in inconsistent firmness and requiring manual reinflation
• air-based adjustable firmness beds may become unusable if their original pump or control system fails

This project provides a flexible and serviceable solution that:

• maintains the defined pressure target automatically
• preserves user-defined comfort settings
• can be adapted to a wide range of air mattresses

Core Capabilities

• automatic leak compensation
• supports multiple user-defined firmness presets
• detects occupancy by analyzing pressure magnitude and rate-of-change, allowing the system to distinguish between load changes and air loss
• maintains the defined pressure target without requiring manual adjustment during use
• supports single-zone or dual-zone operation
• designed to be expandable with Bluetooth communication to enable basic control via a smartphone app that also enables advanced calibration