MMW-1 Magnetic Presence Sensor - LD2410C + ESP32-C3 High-Performance Housing

MMW-1 Human Presence Sensor (Basic Edition)

The MMW-1 is a high-performance, compact housing designed for the LD2410C mmWave sensor and ESP32-C3 SuperMini. This design features a technician-grade internal stack and a magnetic mounting system for tool-less maintenance.

Bill of Materials (BOM)

• Electronics: ESP32-C3 SuperMini & LD2410C Sensor.

• Magnets: 6x3 mm Neodymium Magnets.

• Screws: 2x M3x4 mm Screws (to secure the protoboard).

• PCB: Standard 2.54mm pitch protoboard.

Technical Specifications & Assembly

• PCB Preparation: Cut your protoboard to exactly 30x30 mm. This size is required for the board to slide perfectly into the internal guide rails.

• The "Header-Lift": Use headers to lift the boards away from the protoboard. This creates a safety air gap for thermal management and prevents ghosting issues.

• Magnetic Mount: The backplate is designed for a press-fit for 6x3 mm magnets.

Links & Resources

Find the full wiring diagram, ESPHome YAML configurations, and shopping links for all components on the Circuit Savers GitHub: [Link]

Recommended Print Settings

Layer Height: 0.16mm (Critical for rail and magnet tolerances).

• Wall Loops: 3 (Ensures the screw holes for the M3x4mm screws have enough "meat" to grab).

• Infill: 15-20% Gyroid (Good strength for the magnetic backplate).

• Material: PLA, PETG, or ABS/ASA.

• Support: None required. The internal rails are designed to print cleanly without support.

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