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December 15, 2025December 16, 2025

The ESP Private Agents platform aims to ease the development of ESP32-based AI voice assistants with on-device processing

Espressif has just introduced the ESP Private Agents platform to help developers build local, private, and customizable AI assistants for ESP32 devices running on-device, although they can also support hybrid AI workloads with a mix of on-device and cloud processing. The ESP Private Agents platform offers a unified framework that allows developers to build applications combining speed, vision, automation, and agent-based interactions, for example, a multi-lingual, on-device voice agent (aka smart speaker) or task-oriented agents that automate workflows. The solution is built on AWS cloud services using AWS Fargate as a primary application platform and Amazon Bedrock Foundation Models as backend LLM systems. It not only works with ESP32-power devices with speaker and microphone, but also with mobile apps and web clients. Espressif released a Web-based demo, which you can use as a text-based chatbot or as a voice assistant leveraging the speaker and microphone on your computer. The company […]

PhaseLatch Mini modular Software Defined Radio platform

November 25, 2025November 24, 2025

PhaseLatch Mini – An STM32-based low-cost SDR digitizer with two 12-bit ADCs, 210 kS/s USB streaming

PhaseLatch Mini is a low-cost STM32-based SDR digitizer for the previously released Phase Loom (tuner aboard), built in a Blue Pill–style form factor for HF, FM, and VHF experimentation. The board uses two 12-bit ADCs that sample I and Q at the same time, combine both readings into a 32-bit data word, and send the data over USB at about 210,000 I/Q sample pairs per second using just the standard USB CDC interface. It includes SMA inputs, a built-in ~100 kHz low-pass filter network, USB-C connectivity, ferrite-filtered power, and dedicated 8 MHz/32.768 kHz crystals for stable timing. Other features of the board include dynamic timer tuning, circular DMA, ISR-driven packet chaining, and a lock-free USB feed path to maintain high-rate streaming. PhaseLatch Mini specifications: Microcontroller – ST STM32F103C8 Arm Cortex-M3 @ 72 MHz USB Interface – USB-C 2.0 (Full-Speed) port; CDC class; RAW vendor class planned ADC subsystem Dual simultaneous […]

Espressif’s EchoEar ESP32-S3 voice-controlled AI chatbot runs esp-brookesia firmware

Espressif Systems’ EchoEar is a compact ESP32-S3 AI chatbot designed for voice interaction and edge AI applications, for smart toys, voice-enabled speakers, and control systems. It features a 1.85-inch circular touch display, a dual microphone array with local wake-word detection, and support for large AI models from OpenAI, Xiaozhi AI, and Gemini. The kit is built around the ESP32-S3-WROOM-1 Wi-Fi 4 and Bluetooth 5 module, and also integrates a 3W speaker for audio interaction, and a microSD card slot for data storage. Other hardware features include a BMI270 IMU, a green LED, a USB-C port, a magnetic connector, and a battery management chip. Espressif EchoEar Specifications Wireless Module – ESP32-S3-WROOM-1 SoC – Espressif Systems ESP32-S3R8 CPU – Dual-core Tensilica LX7 up to 240 MHz with vector extension for AI/ML workloads RAM – 512KB SRAM, 8MB PSRAM ROM – 284KB Wireless – WiFi 4 and Bluetooth LE 5 Storage – 16MB […]

Destore Citronics Fairphone 2 industrial gateway

March 2, 2025March 6, 2025

Citronics built a router based on the Fairphone 2 mainboard

Belgium-company Citronics has designed a router based on the mainboard of the Fairphone 2 smartphone, connecting the Qualcomm Snapdragon 801 “system-on-module” to a carrier board with Ethernet, USB ports, and other connectors, while leveraging 4G LTE, WiFi, and Bluetooth connectivity from the phone’s core board. Citronics calls this type of hardware “Circular Microcomputers,” which refers to small computers focusing on sustainability and circular economy principles using parts from discarded devices like old smartphones. There’s actually more than one router, as Citronics designed its own development kit, and also partnered with other companies to design custom gateways based on the Fairphone 2 mainboard. Let’s have a look at the devkit first. Citronics devkit: Fairphone 2 mainboard SoC – Qualcomm Snapdragon 801 (MSM8974AB) quad core Krait 400 processor @ up to 2.26 GHz with Adreno 330 GPU System Memory – 2 GB LPDDR3 Storage – 32GB eMMC flash Connectivity – 2G/3G/4G LTE, […]

December 11, 2024December 11, 2024

Waveshare Double Eye LCD module is a high-tech alternative to googly eyes

Waveshare has recently launched the Double Eye LCD module (also known as the 0.71inch DualEye LCD module), a high-tech alternative to googly eyes, with two 0.71-inch round IPS displays with 160×160 pixels of resolution and 65K color depth. It uses the GC9D01 driver and communicates via an SPI interface. The module operates at a 3.3V or 5V and is designed so that both ESP32 and Arduino boards can drive it. These features make this device useful for applications like wearables, robotics, IoT devices, etc… Waveshare Double Eye LCD module specifications: Display Type – Dual 0.71-inch round LCD displays Resolution – 160×160 pixels Panel – IPS (wide viewing angle) Colors – 65K colors Pixel Pitch – 37.5 × 112.5 µm Controller and Driver Driver – GC9D01 Interface – SPI Operating Voltage – 3.3V / 5V Dimensions Display – 18 mm ∅ per round LCD Module – 51 x 20 mm The […]

July 17, 2024July 16, 2024

SONOFF SWV Review – A Zigbee Smart Water Valve tested with eWelink and Home Assistant

Today, we are going to test and review another new Zigbee product from SONOFF, the SONOFF Zigbee Smart Water Valve (SWV). This is the first water valve built by SONOFF. When it comes to devices related to water control, whether watering plants or opening and closing valves in tanks or pools, many people might be familiar with the SONOFF 4CHPro model, which is a WiFi smart switch that controls solenoid valves with DC or AC power (valve sold separately). The SONOFF SWV is an all-in-one device that integrates both valve control and IoT functionality in one. It is ideal for plant watering around the house or controlling water filling into pools or tanks. Besides being able to set schedules for opening and closing valves, it also has other interesting features. Let’s look at the details. Unboxing the SONOFF Zigbee Smart Water Valve Inside the box, you will find the valve […]

June 11, 2024

GateMate Integrated Logic Analyzer (ILA) deep dive

CNXSoft: This is a guest article by Dave Fohrn, Embedded Software Engineer at Cologne Chip AG, that goes into detail about the company’s open-source integrated logic analyzer (ILA) for GateMate FPGA chips. A field-programmable gate array (FPGA) is a highly flexible integrated circuit in which complex logic circuits can be configured. They are often used as custom computing units in digital circuits because of their ability to process data quickly and in parallel using individually configured circuits. The digital circuits designed specifically for FPGAs are usually developed in a hardware description language such as Verilog or VHDL and are known as gateware. The term “gate” refers to the configurable digital logic units in the FPGA on which the individual gate circuits are implemented. An effective design can accelerate the computing process by strategically utilizing the various resources available in the FPGA, processing data in parallel, and intelligent implementing pipelining. A […]

January 11, 2024July 5, 2024

SunFounder PiCar-X 2.0 review – A Raspberry Pi 4 AI robot car programmable with Blockly or Python

SunFounder PiCar-X 2.0 is an AI-powered self-driving robot car using the Raspberry Pi 3/4 as the main processing board. It is equipped with a camera module that can be moved by a 2-axis servo motor, allowing the camera to pan or tilt, an ultrasonic module for detecting distant objects, and a line detection module. The PiCar-X robot can also perform computer vision tasks such as color detection, face detection, traffic signs detection, automatic obstacle avoidance, and automatic line tracking. The PiCar-X can be programmed with two computer languages: Blockly-based Ezblock Studio drag-and-drop program and Python, and the robot works with OpenCV computer vision library and TensorFlow for AI workloads. Finally, you can also control the robot through the SunFounder controller application on your mobile phone. The company sent us a sample of the Picar-X 2.0 for review, so let’s get started. SunFounder PiCar-X 2.0 robot overview The PiCar-X robot kit […]