https://cyberdiary.net/tags/hardware/Recent content in Hardware on CyberDiaryHugo -- 0.159.0en-usandrew@cyberdiary.net (Andrew)andrew@cyberdiary.net (Andrew)Thu, 23 Apr 2026 00:00:00 -0400https://cyberdiary.net/posts/wardriver/Thu, 23 Apr 2026 00:00:00 -0400andrew@cyberdiary.net (Andrew)https://cyberdiary.net/posts/wardriver/<img src="https://cyberdiary.net/wardriver.png" alt="wardriver build"> <img src="https://cyberdiary.net/wardriver2.png" alt="screenshot of wardriver"> <p> </p> <h2 id="introduction">Introduction</h2> <p>I turned a Raspberry Pi 4B into a mobile signals intelligence platform that runs headless in a case, logs every Wi-Fi network it passes, captures packets, records GPS coordinates for every device it sees, and scans for cell towers. All accessible remotely from anywhere in the world through a reverse SSH tunnel.</p> <p>This is a documentation of the full build from scratch.</p> <p> </p> <h2 id="the-hardware">The Hardware</h2> <ul> <li><strong>Raspberry Pi 4B</strong> - the brain</li> <li><strong>Alfa AWUS036AXML</strong> - dual-band Wi-Fi adapter with MediaTek MT7921AU chipset, supports monitor mode natively on Linux</li> <li><strong>G-Mouse USB GPS antenna</strong> (u-blox 8 chipset) - shows up as <code>/dev/ttyACM0</code>, NMEA at 9600 baud</li> <li><strong>HackRF One</strong> - software defined radio covering 1 MHz to 6 GHz for cell tower scanning</li> <li><strong>VPS (DigitalOcean)</strong> - acts as a relay for the reverse SSH tunnel</li> </ul> <p> </p>