HackRF H4M Guides

1. Quick Checks Before Troubleshooting Further Use the original USB-C cable and a verified power source (5V/2A recommended). Inspect the USB-C connector for dust, damage, or bent pins and clean gently if needed. Try multiple cables and...

The Problem: Most Common H4M Hardware Failure The RF amplifier (MGA-81563-TR1G) in your HackRF H4M is the most vulnerable component to damage. When working properly, enabling the amp should increase signal strength by ~11 dB. When damaged, enabling the...

Common Screen Problems Overview White Screen on Boot : Display shows solid white, no Mayhem interface Black Screen : No display output, device may show LED activity Intermittent Display : Screen works only with pressure or specific...

What's in Your H4M Package Your HackRF H4M bundle should include: HackRF PortaPack H4M Device : Fully assembled SDR with integrated battery and display Charging Cable : USB-C cable for fast charging and data connection Antenna...

Why Use the Web Flasher Method? No local toolchain or USB drivers required Instant OTA updates via your browser Always fetches the latest official Mayhem release Safe, with built-in file integrity checks Prerequisites...

Overview Mayhem firmware versions 2.1.0 and 2.2.0 introduce significant enhancements and fixes for HackRF PortaPack H4M users. This comparison highlights all changes and explains why updating to v2.2.0 is essential. Major New Features in v2.2.0...

Prerequisites HackRF PortaPack H4M with current Mayhem firmware MicroSD card (FAT32) with Mayhem data files loaded Appropriate antenna for the band you’re analyzing (we recommend the 12 dBi 700–2700 MHz antenna included in some bundles)...

Prerequisites HackRF PortaPack H4M with current Mayhem firmware MicroSD card (FAT32) with free space for IQ recordings An antenna matched to the target band Local, lawful test signals (e.g., simple OOK/ASK remotes, sensors, or a test...

1. No Signal or Weak Signal Reception Check Antenna Connection: Ensure that the antenna is properly connected to the HackRF H4M. A loose or damaged antenna can cause weak or no signal reception. Verify Frequency Settings: Double-check that...

Prerequisites HackRF PortaPack H4M running Mayhem v1.7.4 or newer (v2.0.1+ for cloud upload) MicroSD card formatted FAT32 with Mayhem files Your 240 × 304 px, 24-bit BMP image named splash.bmp Optional tools: ImageMagick or any...

What You Need HackRF PortaPack H4M MicroSD card (16–32 GB, genuine brand recommended) SD card reader (for computer users) Windows or Linux computer (optional) Android phone with SD card slot (optional) USB cable (for...

Prerequisites HackRF PortaPack H4M with Mayhem firmware v2.0.1+ installed MicroSD card formatted to FAT32 containing ADS-B map files ( /ADSB/world_map.bin , world_map.jpg ) ADS-B antenna (12 dBi, 700 MHz–2700 MHz) — included in...