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Signal Sentry - An Arduino Framework Signal Recorder and Repeater

License: AGPL v3

Welcome to Signal Sentry!

This is an embedded C++ project based on the Arduino framework that allows you to monitor, analyze, and repeat digital signals.

                  Signal Sentry
              __     __     __     __
      _______|  |___|  |___|  |___|  |_______

                      _______
                  +--|       |--+
      Pin 1   --+--+  o     o  +--+-   Pin 2
                | |  |       |  | |
      Pin 3   --+--+  o     o  +--+-   Pin 4
                | |  |       |  | |
      Pin 5   --+--+  o     o  +--+-   Pin 6
                  +--|_______|--+

              __     __     __     __
      _______|  |___|  |___|  |___|  |_______

An Arduino framework signal recorder and repeater

Features

  • Listen to digital signals and save the latest one in EEPROM
  • Replay the saved signal at any point in time in the future
  • Uses one pin for listening to a signal, one pin for signal output at replay time, and one pin per each of the two buttons that control the state of the program
  • Simple configuration using the settings.h.dist file
  • Should be compatible with most Arduino boards

Installation and Usage

  • Clone this repository to a directory of your choosing.
  • Configure the include/settings.h.dist file and move it to include/settings.h.
  • If you are using PlatformIO, configure the platformio.ini file.
  • Compile the source for your microcontroller and upload it.
  • Connect the pins for signal input, signal output, and the control buttons as specified in the settings.h file.
  • Use the control buttons to switch between IDLE, RECORDING, SAVING, and REPLAYING modes.

What is Signal Sentry?

After entering the RECORDING state, Signal Sentry starts listening for signals on the PIN_SIGNAL_INPUT pin. The SAVING state is used to store the signal in EEPROM. When the device enters the REPLAY state, the signal is played back on the output pin.

Why Use Signal Sentry?

  • Red teamers and pentesters can use Signal Sentry to analyze and debug digital signals in IoT devices.
  • It provides a cost-effective and easy-to-use alternative to HackRF One, Flipper Zero, and similar devices.
  • Signal Sentry can be used as a software oscilloscope to debug digital signals.

Contribution

If you find a bug or have an idea for a new feature, please open an issue or submit a pull request. Your contribution is greatly appreciated!

License

This project is licensed under the terms of the GNU Affero General Public License v3.0 (AGPL-3.0). See LICENSE for more information.

Contact

For questions, comments, or suggestions, please contact patterns-complexity at @patterns-complexity.