Quectel FCM365X dual-band WiFi 6, BLE 5.4, 802.15.4 IoT module features NXP RW612 MCU, optional PSRAM

A BIOS For Your ESP32-C6

Rompass đã phát triển một firmware tương tự BIOS cho vi điều khiển ESP32-C6, cung cấp bootloader và lớp API hỗ trợ tải động các chương trình từ RAM, thậm chí qua mạng. Dự án thể hiện xu hướng xóa nhòa ranh giới giữa vi điều khiển và bộ vi xử lý, xu hướng này sẽ tiếp tục khi các bộ xử lý ứng dụng mạnh mẽ như ESP32-P4 trở nên phổ biến.

Lập trình viên ESP32-C6 nên đọc để khám phá cách mở rộng khả năng quản lý khởi động và chạy ứng dụng động từ RAM hoặc mạng, giúp tối ưu hóa hiệu suất và linh hoạt cho các dự án yêu cầu tính linh hoạt cao hơn.

OpenC6 BIOS project brings PC-like firmware to ESP32-C6 MCU with network boot and OTA update support

OpenC6 BIOS is an open-source project that brings PC BIOS-like architecture to the ESP32-C6 microcontroller. Instead of combining hardware setup and application code into a single firmware image, it separates the base system from application payloads (2–10 KB). Key features include dynamic CPU frequency scaling, a System Call Interface (ABI) for Wi-Fi/crypto/math access without full ESP-IDF, PXE-like network boot over Wi-Fi, A/B OTA updates with rollback, a web-based BIOS setup interface, LP-Core health monitoring using the ESP32-C6's low-power RISC-V core, and Aura Sync RGB support. The project targets ESP32-C6 boards with at least 8MB flash and is available on GitHub under the MIT license.

Iridium Development Kit Accelerates Hybrid IoT Design

Iridium Communications has launched the 9604 module and development kit, a hybrid IoT platform combining satellite (SBD), LTE-M cellular, and GNSS into a single compact module (16×26×2.4 mm). Built on the u-blox SARA-R5 platform, it can reduce board space by over 60% versus discrete implementations. The module supports GPS, GLONASS, Galileo, and BeiDou, offers independent subsystem management for custom failover strategies, and provides a unified AT command interface with an SDK. It targets industrial monitoring, transportation, maritime, and remote asset tracking applications where terrestrial networks may be unavailable.

CSS On The ESP32

The Gea stack enables developers to write CSS and TypeScript for ESP32 microcontrollers, compiling it into native C++ firmware. A demo shows a smooth 3D cube animation running at up to 60 FPS on a 410×502 AMOLED screen with full color and transparency support. It's not a full browser engine — limitations include no hover states, rasterized fonts, and a 512-node UI tree cap — but it lets web developers leverage familiar skills for embedded UI development without major performance loss.

Someone built a BIOS for the ESP32-C6, bringing a PC-like architecture to the $2 chip

OpenC6 is an open-source BIOS-like firmware for the ESP32-C6 microcontroller that reimagines the $2 chip with a PC-style architecture. Rather than monolithic firmware, it acts as a host platform that initializes hardware, provides out-of-band management via an LP-Core coprocessor, and exposes a standardized System Call Interface (ABI). This lets developers hot-swap, download, and execute tiny bare-metal payloads directly into RAM or Execute-In-Place (XIP) Flash. The project is still in progress, with open bounties for features like a fully open-source file system and execution security measures.

Sleep Tracking, Bluetooth Signals, and EMF: What Every Wearable User Should Know

Sleep tracking wearables like the Oura Ring and Apple Watch use Bluetooth Low Energy (BLE), which transmits at 1–10 milliwatts — far below the power of a phone call and well within FCC and ICNIRP SAR safety limits. WHO-commissioned systematic reviews published in 2024–2025 found no causal link between RF-EMF exposure below safety thresholds and sleep disruption. A common mistake is citing ELF (50–60 Hz power line) melatonin studies to argue against 2.4 GHz Bluetooth devices — these are different parts of the spectrum with different biological interaction mechanisms. For those still concerned, enabling airplane or low-power mode at night reduces wireless transmissions while preserving most sensor-based tracking. The more significant risk from sleep trackers may actually be 'orthosomnia' — anxiety driven by obsessing over inaccurate sleep stage estimates that wearables infer from movement and heart rate rather than measure directly.

Louder ESP32 Mini board adds WiFi and Bluetooth to old speakers for SqueezeLite, Snapclient, or ESPHome support

Sonocotta's Louder ESP32 Mini is a compact open-source hardware board designed to retrofit old passive speakers with WiFi and Bluetooth connectivity. Built around the ESP32-S3 with 8MB PSRAM and a TAS5805M DAC/amplifier, it comes in two sizes (42×42mm and 52×52mm) and replaces the standard speaker terminal cup. It supports multiple firmware options including Squeezelite-ESP32 for Spotify Connect and AirPlay, Snapclient for multi-room audio, and ESPHome for Home Assistant integration. Priced at $15–$20, it's available on Lectronz and Tindie, with schematics and Gerber files published on GitHub.