Magnetic Attached Compact Contact Sensor PoC
Budget: €30 – €250 EUR
Compact One-Way Contact Sensor with Magnetic Attachment (Proof of Concept)
1. Overview
This project involves the development of a compact, magnetically attached contact sensor system. The system consists of:
• Part A (Fixed Unit): Permanently installed in the vehicle, containing a microcontroller (ESP32 or similar) with Bluetooth connectivity.
• Part B (Removable Unit): A detachable component that transmits a unique identifier (UID) to Part A upon contact.
This version is intended as a first-round proof of concept (PoC) to validate functionality, mechanical attachment, and communication reliability. It is not yet intended for mass production.
2. Key Requirements
2.1. Size Constraints
• Overall dimensions: Smaller than a deck of cards.
• Compact and lightweight
• Slim profile (10mm–20mm) to avoid obstruction or interference
2.2. Magnetic Attachment & Mechanical Considerations
• Attachment Mechanism:
• Uses permanent magnets or electromagnets to secure Part B to Part A.
• Holding Force:
• Strong enough to maintain a stable connection under vibrations.
• Weak enough to allow easy removal when needed.
2.3. One-Way Data Transmission
• Direction: One-way communication from Part B to Part A.
• Data Handling:
• Part B transmits a unique identifier (UID).
• Part A receives and processes the UID via its microcontroller (ESP32 or similar) with Bluetooth connectivity.
• Power Efficiency:
• Minimal power consumption—Part B should require very low power or operate passively.
2.4. Identification & Security
• Unique Identifier (UID):
• Each Part B must contain a unique and verifiable ID for recognition.
• Security Considerations:
• Prevent unauthorized cloning of Part B.
• Consider encryption or authentication methods if needed.
2.5. Power Management
• Wake-up Mechanism:
• Part A should detect when Part B is attached and wake up.
2.6. Environmental Considerations
• Temperature Resistance:
• Must operate in extreme hot and cold vehicle interiors (-30°C to +85°C).
• Moisture Protection:
• Prevents short circuits or corrosion due to moisture buildup.
• UV and Heat Resistance:
• Part A may be exposed to direct sunlight
• Materials must resist prolonged UV exposure without degradation.
• Shock & Vibration Resistance:
• Designed to withstand movement without affecting electrical contacts.
3. Proof of Concept Goals
The objective of this PoC is to:
• Validate mechanical attachment strength and ease of use.
• Test data transmission reliability between Part B and Part A.
• Assess power efficiency and wake-up functionality.
• Verify environmental durability (heat, moisture, vibration).
1. Overview
This project involves the development of a compact, magnetically attached contact sensor system. The system consists of:
• Part A (Fixed Unit): Permanently installed in the vehicle, containing a microcontroller (ESP32 or similar) with Bluetooth connectivity.
• Part B (Removable Unit): A detachable component that transmits a unique identifier (UID) to Part A upon contact.
This version is intended as a first-round proof of concept (PoC) to validate functionality, mechanical attachment, and communication reliability. It is not yet intended for mass production.
2. Key Requirements
2.1. Size Constraints
• Overall dimensions: Smaller than a deck of cards.
• Compact and lightweight
• Slim profile (10mm–20mm) to avoid obstruction or interference
2.2. Magnetic Attachment & Mechanical Considerations
• Attachment Mechanism:
• Uses permanent magnets or electromagnets to secure Part B to Part A.
• Holding Force:
• Strong enough to maintain a stable connection under vibrations.
• Weak enough to allow easy removal when needed.
2.3. One-Way Data Transmission
• Direction: One-way communication from Part B to Part A.
• Data Handling:
• Part B transmits a unique identifier (UID).
• Part A receives and processes the UID via its microcontroller (ESP32 or similar) with Bluetooth connectivity.
• Power Efficiency:
• Minimal power consumption—Part B should require very low power or operate passively.
2.4. Identification & Security
• Unique Identifier (UID):
• Each Part B must contain a unique and verifiable ID for recognition.
• Security Considerations:
• Prevent unauthorized cloning of Part B.
• Consider encryption or authentication methods if needed.
2.5. Power Management
• Wake-up Mechanism:
• Part A should detect when Part B is attached and wake up.
2.6. Environmental Considerations
• Temperature Resistance:
• Must operate in extreme hot and cold vehicle interiors (-30°C to +85°C).
• Moisture Protection:
• Prevents short circuits or corrosion due to moisture buildup.
• UV and Heat Resistance:
• Part A may be exposed to direct sunlight
• Materials must resist prolonged UV exposure without degradation.
• Shock & Vibration Resistance:
• Designed to withstand movement without affecting electrical contacts.
3. Proof of Concept Goals
The objective of this PoC is to:
• Validate mechanical attachment strength and ease of use.
• Test data transmission reliability between Part B and Part A.
• Assess power efficiency and wake-up functionality.
• Verify environmental durability (heat, moisture, vibration).