Syrus Lite Spy Mode

Microphone USB Mod Connection Guide for Syrus Lite

The Syrus Lite’s IP-certified case cannot be closed if a microphone is connected directly to the built-in USB port. To maintain environmental protection while integrating a microphone, a workaround is required.We engineered a custom USB extension mod by removing the male plug of a USB extension cable and resoldering the microphone wires in a space-saving manner to allow internal fitting within the case. This preserves IP certification while enabling microphone functionality.

Steps

1. Pinout Identification

Refer to the standard USB Male (Plug M) pinout:
• Pin 1 (Red): VBUS (Power)
• Pin 2 (White): D− (Data−)
• Pin 3 (Green): D+ (Data+)
• Pin 4 (Black): GND (Ground)

This pinout is confirmed visually in Image 1 and Image 2.

2. Disassembly

Cut and remove the USB male tip from the extension cable, exposing the four internal wires.

3. Before soldering the microphone cables to the connector, make sure to pass the cables through the rubber encasing (encauchetado) that will protect the final assembly. Failing to do this before soldering will make it impossible to add the protective rubber afterward without desoldering.
   Steps:
   1. Identify the rubber sheath or grommet that will cover the soldered connection.
   2. Insert the microphone cables through this rubber piece before beginning any soldering.
   3. Proceed with the soldering process once the cables are in place.
   4. Once soldered, slide the rubber piece down to cover the soldered joints, ensuring a secure and insulated finish.
   This step is crucial for maintaining both durability and a clean, professional installation.
   ⸻

   

4. Re-soldering in Compact Orientation

Solder the wires directly to a bare USB plug interface while respecting the pinout polarity:
• Red wire to Pin 1
• White wire to Pin 2
• Green wire to Pin 3
• Black wire to Pin 4

4. Connection to Syrus Lite Board

Connect the modified USB wiring internally to the Syrus Lite motherboard via the exposed USB lines.

5. Encasing

Carefully encase the modified wiring, ensuring no short circuits or tension points. This allows the Syrus Lite IP-rated enclosure to close completely.

Validation

• Continuity testing was performed to verify all polarities match the USB specification.
• Functional testing with the microphone confirms data and power transmission is intact.

Notes

• Do not reverse polarity: incorrect wiring can damage the Syrus Lite board.
• Use heat-shrink tubing or resin to secure and protect solder joints.
• Document wire colors and pin assignments if using non-standard USB wires.