Audio

Microphone Plug & Play Guide

This guide walks support personnel through setting up a plug-and-play microphone with the Syrus Lite device for use in spy/listen-in mode. This version does not require the IP-sealed case to remain closed.

What You Need:

Syrus Lite device (powered on)
SIM card with voice calling enabled (must support audio)
Standard USB microphone
Apex firmware properly loaded onto the device
Access to Pegasus Cloud for firmware verification and control

Step-by-Step Instructions

Insert the SIM
Use a SIM card that supports voice calls.

Optionally, configure it with a known caller number for authorized access.

Connect the Microphone
Plug the USB microphone directly into the USB port of the Syrus Lite board.

Since this is for support and testing, the IP-sealed case can remain open (see image for reference).

Verify Firmware
Log into Pegasus Cloud

Make sure:

Apex is installed

SyrusJS version is not required for this feature

Call the Device
There are two calling modes:

Unrestricted: The device accepts calls from any number

Restricted (Recommended): The device only accepts calls from authorized numbers

If restricted mode is preferred, make sure to configure the authorized number(s) in Pegasus Cloud or via a command file.

How to Trigger Spy Mode:
Simply call the number associated with the SIM inserted in the Syrus Lite.

If the setup is correct, the microphone will begin transmitting audio from the environment.

Notes for Support:
Ensure signal strength and SIM credit are sufficient for voice calls.

If audio does not transmit, verify:

That the SIM is active and call-enabled

The microphone is functional and securely plugged in

Apex firmware is correctly loaded

For long-term deployments, use the IP-sealed internal wiring method (see engineer version of the guide).