This is a bare-metal (no_std) hardware abstraction layer (HAL) for Espressif ESP32 microcontrollers, supporting RISC-V and Xtensa cores. It provides low-level drivers for GPIO, SPI, I2C, UART, ADC, DAC, PWM, timer, USB, Ethernet, Wi-Fi, BLE, IEEE 802.15.4, and many other peripherals across a dozen+ chip families (ESP32, ESP32-C2/C3/C5/C6/C61, ESP32-H2/H4, ESP32-P4, ESP32-S2/S3/S31). The repository is a monorepo containing multiple independently versioned crates: esp-hal (core HAL), esp-radio (wireless radio stacks), esp-alloc (heap allocator), esp-storage (flash storage), esp-backtrace, esp-println, esp-sync (synchronization primitives), esp-rom-sys (ROM function bindings), esp-rtos (lightweight RTOS with async/embassy integration), esp-lp-hal (low-power core HAL), esp-config (build-time configuration), esp-metadata (chip property code generation), xtask (build/release tooling), and bootloader/OTA support. The architecture is built on extensive use of compile-time chip selection via macros (cfg_select!, for_each_*), versioned low-level driver modules per peripheral, and type-erased patterns for unified APIs across chip variants. Async support is first-class via embassy executor integration. The codebase demonstrates high engineering quality with clear abstractions, comprehensive hardware-in-the-loop testing (hil-test, hil-test-radio), and mature CI/CD workflows.
This repository is a GNU Radio out-of-the-module (OOT) implementation of the LoRa physical layer. It provides a comprehensive set of signal processing blocks for transmitting and receiving LoRa signals, including channel coding (Hamming), interleaving, whitening, CRC, header processing, modulation, demodulation, and frame synchronization. The module is designed for use with GNU Radio 3.10+ and includes hierarchical blocks for quick assembly of transmitter and receiver flowgraphs in GNU Radio Companion or Python. It also features a simulation framework for performance evaluation (BER/FER vs SNR) and has been validated with USRP hardware and commercial LoRa transceivers. The code is modular, well-documented, and actively maintained, with recent updates adding support for lower spreading factors (SF 5-6) and improved soft-decision decoding.
FISSURE is a modular RF signal-intelligence and reverse-engineering framework. In production it provides a PyQt5 dashboard for spectrum survey, IQ capture/playback, burst conditioning, signal classification, protocol discovery, targeted transmission, and fuzzing across SDR hardware such as USRP, HackRF, LimeSDR, RTL-SDR, PlutoSDR, and bladeRF. It coordinates distributed sensor nodes through a HIPRFISR hub over ZMQ, integrates with TAK via Cursor-on-Target messaging, and supports plugin-based automation operations. The repository also contains a very large GNU Radio flow graph library (maintained for GR 3.8 and 3.10), custom OOT blocks for ADS-B, Bluetooth, ACARS, X10, Z-Wave, fuzzing, and wideband detection, plus packet-crafting and replay tooling for security research.