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March 28, 2025 by Jean-Luc Aufranc (CNXSoft) - 17 Comments

A LoRa-based Walkie-Talkie? Meet LILYGO T3-S3 MVSR LoRa voice communication kit

LoRa Voice Communication Kit Walkie Talkie

With its low-power, long-range capabilities, LoRa has been used for P2P and Mesh messaging with firmware like MeshTastic, but due to its limited bandwidth, we haven’t seen quite as many LoRa audio applications. This has not stopped LILYGO from designing the T3-S3 MVSR LoRa voice communication kit, integrating LoRa radio, a microphone, and a speaker to use the board as a walkie-talkie solution working over Semtech SX1262 or SX1280 RF transceiver. LILYGO T3-S3 MVSR specifications: SoC – Espressif Systems ESP32-S3FH4R2 CPU – Dual-core Tensilica LX7 microcontroller @ up to 240 MHz Wireless – 2.4 GHz 802.11n WiFi 4 and Bluetooth 5.0 LE connectivity Memory – 2MB PSRAM Storage – 4MB SPI flash Storage – MicroSD card slot Display – 0.96-inch 128×64 OLED display with SSD1306 I2C driver Audio MAX98357A Speaker MSM261S4030HOR Microphone LoRa module (one or the other) LORA32 SX1262 with 868MHz or 915 MHz radio LoRa 2.4G module based […]

March 14, 2025 by Jean-Luc Aufranc (CNXSoft) - No Comments

UNIHIKER K10 low-cost TinyML education platform supports image detection and voice recognition

UNIHIKER K10 is a low-cost STEM education platform for TinyML applications that leverages the ESP32-S3 wireless microcontroller with vector extensions for workloads such as image detection or voice recognition. The UNIHIKER K10 also features a built-in 2.8-inch color display, a camera, a speaker, a 2-microphone array, a few sensors, a microSD card, and a BBC Micro:bit-like edge connector for power signals and GPIOs. It’s a cost-optimized version of its Linux-based big brother – the UNIHIKER M10 – first unveiled in 2022. Arnon also reviewed the UNIHIKER in 2023, showing how to configure it, use the SIoT platform with MQTT message, and program it with Jupyter Notebook, Python, or Visual Studio Code. Let’s have a closer look at the new ESP32-S3 variant. UNIHIKER K10 specifications: Core module – ESP32-S3-WROOM-1 MCU – ESP32-S3N16R8 dual-core Tensilica LX7 up to 240 MHz with 512KB SRAM, 8MB PSRAM, 16MB flash Wireless – WiFi 4 and […]

March 4, 2025 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

The One Smart AI Pen – A ballpoint pen with Bluetooth and a microphone for translation, LLM integration, note taking (Crowdfunding)

You may have seen the “Sell me that pen. It’s AI-powered” meme if you are a social media user. It may have started as a joke, but Zakwan Ahmad made the meme become reality with “The One Smart AI Pen” which is basically a standard ballpoint pen with a battery, Bluetooth connectivity, a microSD card, and a microphone. The AI part is not exactly inside the pen per se, but in a smartphone’s app called Hearit.ai that allows the user to translate his/her voice input, use a range of LLMs such as ChatGPT, recording a meeting, or taking notes, for example, to schedule events or meetings. The One Smart AI Pen specifications: “AI chip” – Not clear why it’s needed here… unless it transcribes audio into text inside the pen (as opposed to inside the phone) Storage – MicroSD card slot inside the pen Wireless – Bluetooth 5.2 with up […]

February 24, 2025February 25, 2025 by Jean-Luc Aufranc (CNXSoft) - No Comments

The OpenVoiceOS Foundation aims to enable open-source privacy and customization for voice assistants

The OpenVoiceOS Foundation, or OVOS Foundation for shorts, is a non-profit organization dedicated to advancing open-source voice assistant technology and offers an open-source privacy-focus alternative to voice assistant by large companies like Amazon, Google, and Apple. One of the founders, Peter Steenbergen (j1nx), explained to us it all started when he read an article on CNX Software about Mycroft Mark II voice assistant hardware in 2018. He ended up being involved and created “MycroftOS“, later renamed to “OpenVoiceOS – Mycroft Edition”, as a Just Enough OS utilizing Buildroot and working on the Mark II. There were some tensions with the open-source community at some point, and the Mycroft project went south from there and the company had to close in 2023. Eventually, OpenVoiceOS took over the codebase of Mycroft A.I. and managed to merge lingering PR from the open-source community. Together with NEON A.I., they took over the Mycroft A.I. community […]

January 24, 2025January 24, 2025 by Tomisin Olujinmi - No Comments

ESP32 Agent Dev Kit is an LLM-powered voice assistant built on the ESP32-S3 platform (Crowdfunding)

The ESP32 Agent Dev Kit is an ESP32-S3-powered voice assistant that offers integrations with popular LLM models such as ChatGPT, Gemini, and Claude. Wireless-Tag says the Dev Kit is suitable for “95% of AIoT applications, from smart home devices to desktop toys, robotics, and instruments” In some ways, it is similar to the SenseCAP Watcher, but it has a larger, non-touch display and dual mic input. It however does not support local language models. It also features a standard MikroBUS interface for expansion. For voice capabilities, the ESP32 Dev Kit integrates two onboard, noise-reducing microphones and a high-fidelity speaker. The built-in infrared laser proximity sensor detects human proximity and movement for “smart interactive experiences”. ESP32 Agent Dev Kit specifications: MCU – ESP32-S3 dual-core Tensilica LX7 microcontroller @ 240MHz, 8MB PSRAM Storage – 16MB flash Display – 3.5-inch Touchscreen, 480×360 resolution Camera – 5MP OmniVision OV5647 camera module, 120° field of […]

January 22, 2025 by Debashis Das - No Comments

u-blox RUBY-W2 is a family of Wi-Fi 7 automotive-grade modules for infotainment and telematics applications

RUBY W2 series Automotive Wi Fi 7 modules

u-blox has recently released the RUBY-W2 series (RUBY-W273-05A and RUBY-W295-05A) of automotive Wi-Fi 7 modules designed for advanced infotainment and telematics applications. These modules support tri-band Wi-Fi 7 and dual-mode Bluetooth 5.4, with up to Gbps (PHY) of throughput, supporting simultaneous use cases for in-car hotspots, Apple CarPlay, and multi-client video streaming. Key features of this module include Multi-Link Operation (MLO) with Dual Band Simultaneous (DBS) and High Band Simultaneous (HBS) modes, 2×2 MU-MIMO, Bluetooth LE Audio, long-range Bluetooth, security with WPA2/3, and secure boot. The modules are based on Qualcomm’s QCA6787AQ or QCA6797AQ automotive chipsets and connect to the host via PCIe for Wi-Fi and UART/PCM for Bluetooth. RUBY-W2 specifications: Chipset Qualcomm QCA6787AQ for RUBY-W273 Qualcomm QCA6797AQ for RUBY-W295) Wireless Tri-band Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) RUBY-W273 – Dual Band Simultaneous (DBS) (2.4 GHz + 5/6 GHz) RUBY-W295 – High Band Simultaneous (HBS), any two bands (2.4, 5, or 6 […]

January 10, 2025January 10, 2025 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Eclipsa Audio is an open, royalty-free alternative to Dolby Audio

Samsung announced Eclipsa Audio 3D technology, a royalty-free alternative to Dolby Audio, would be integrated into TVs and Soundbars in its 2025 lineup at CES 2025. The press release explains the 3D audio technology was developed in partnership with Google and that “Eclipsa Audio allows creators to adjust audio data such as the location and intensity of sounds, along with spatial reflections, to create an immersive three-dimensional sound experience”. Like 90% of announcements at CES 2025, Eclipsa Audio appeared to be mostly fluff. I also noticed it was developed through the Alliance for Open Media which manages the now-widely-used AV1 video codec, but a search for Eclipsa did not return anything. Luckily the “Arm Editorial Team” saved the day with an interesting article published a couple of days ago with more information about Eclipsa Audio. So let’s have a look. Eclipsa Audio is a multi-channel audio surround format that leverages […]

December 27, 2024December 30, 2024 by Debashis Das - 4 Comments

HiFi-Amped is a Raspberry Pi Audio HAT with dual DACs and class-D amplifiers

Sonocotta’s HiFi-Amped is a Raspberry Pi Audio HAT designed for Raspberry Pi single-board computers. It features dual PCM5100 DACs and TPA3110 (2x15W @ 8-Ω or 1x 30-W @ 4-Ω) class D amplifiers for high sound quality and power efficiency. Key features of this module include support for both small and large speakers, an external power source to drive speakers and power the Raspberry Pi, and the ability to shut down the amplifiers using GPIO pins for minimal noise when not in use. This makes it ideal for creating a Raspberry Pi-based media center or audio streaming setup. HiFi-Amped specifications: Compatibility – Raspberry Pi 2, 3, 4, 5, Zero, and potentially others with a Raspberry Pi-compatible GPIO header Amplifier – 2x Texas Instruments TPA3110D2 Class-D amplifiers Output Power 4x 10W into 8 ohms @ 13V 4x 15W into 8 ohms @ 16V 2x 30W into 4 ohms @ 16V (bridged mode) […]