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July 18, 2025 by Debashis Das - 2 Comments

$14 development board features GUITION ESP32-P4 + ESP32-C6 module

JC ESP32P4 M3 DEV ESP32 P4 evolution board

While searching Aliexpress for new products, I found out about the JC-ESP32P4-M3-DEV from the Maker Go AliExpress store, another ESP32-P4 development board with features very similar to the ESP32-P4-Function-EV-Board or the Wireless Tag WT99P4C5-S1 board, but built around the GUITION JC-ESP32P4-M3-C6 module, which combines ESP32-P4 and ESP32-C6 into a single package instead of having separate chips or modules on most other designs. Features include 32MB of PSRAM and 16MB of flash on the GUITION module, a microSD card slot for storage, a built-in microphone, speaker output via the ES8311 audio codec, and an audio amplifier. The board also offers a 10/100Mbps Ethernet RJ45 port, an RS-485 terminal block, a GPIO header, and expansion connectors for both the ESP32-P4 and ESP32-C6 chips. Additionally, there are three USB ports: two USB-C and one USB-A for power, data, and debugging, along with a few buttons and LEDs. JC-ESP32P4-M3-DEV evolution board specifications: Core module […]

July 15, 2025July 14, 2025 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

Radxa E24C and E54C Rockchip RK3528A/RK3582 network computers features four Gigabit Ethernet ports

Radxa E24C and E54C are mini routers and embedded boxes based on, respectively, Rockchip RK3528A and RK3582 SoCs, and equipped with four Gigabit Ethernet ports, HDMI video output, three USB ports, and an M.2 PCIe socket for NVMe SSD storage. The Radxa E24C builds upon the dual Gigabit Ethernet Raxda E20C mini network Titan, while the Radxa E54C is an “update” to the Radxa E52C mini router with four Gigabit Ethernet ports instead of two 2.5GbE ports. Radxa E24C quad GbE mini router Radxa E24C specifications: SoC – Rockchip RK3528A CPU – Quad-core Arm Cortex-A53 @ 2.0 GHz GPU – Arm Mali-G450 GPU with support for OpenGL ES1.1, ES2.0, and OpenVG 1.1 APIs VPU H.264, H.265, and AVS2 decoder up to 4Kp60 H.264 and H.265 encoder up to 1080p60 Memory – 1GB, 2GB, or 4GB LPDDR4 Storage 8GB, 16GB, or 32GB eMMC 5.1 flash MicroSD card slot (UHS-I) M.2 2280 Key-M […]

July 14, 2025July 14, 2025 by Debashis Das - 4 Comments

Industrial IoT board based on NuMicro M467 Ethernet MCU follows Arduino UNO R4 form factor

Nuvoton NuMaker UNO M4 Cortex M4 industrial dev board

The NuMaker-UNO-M4 is an industrial-grade IoT development board powered by a Nuvoton NuMicro M467 series Arm Cortex-M4F Ethernet MCU and following the Arduino UNO R4 form factor. The board also comes with Ethernet, RS485, CAN FD, and a microSD card slot for data logging. Power options include 5V via USB Type-C, 5–5.5V through a DC jack, and external 3.3V/5V through headers. It also features Arduino-compatible headers, push buttons, status LEDs, and a dedicated high-speed USB for power and programming. Nuvoton NuMaker-UNO-M4 Specifications SoC –Nuvoton NuMicro M467SJHAN CPU – Arm Cortex-M4 @ up to 192 MHz, with FPU and DSP Memory – Up to 512 KB SRAM with 64 KB parity check Storage Up to 1024 KB Flash with dual-bank, FOTA, and XOM support 8 KB LDROM, 3 KB OTP ROM Storage – MicroSD card slot Connectivity – 4-pin 10/100 Mbps Ethernet connector via RealTek RTL8201FI PHY USB – USB Type-C port […]

July 13, 2025 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Review of GL.iNet Comet (GL-RM1) KVM-over-IP solution and ATX power control board

GL-RM1 Comet KVM review ATX power control board

GL.iNet sent me a Comet (GL-RM1) remote KVM box for review, along with a GL-ATXPC ATX Power Control Board. I’ll start this review with an unboxing and a teardown, then I’ll use the GL.iNet Comet with a Raspberry Pi 4 SBC to control it from a web browser in the LAN and the GLKVM app from the Internet. Finally, I’ll connect the GL-ATXPC and GL-RM1 to an Orion O6 mini-ITX motherboard to test ATX power control. GL.iNet Comet (GL-RM1) unboxing I received a parcel with two retail boxes: one for the GL-ATXPC ATX power control board and the other for the GL-RM1 Comet Remote KVM. The GL-RM1 ships with an HDMI cable, an Ethernet cable, a USB-A to USB-C cable for keyboard/mouse emulation, and a USB-C to USB-C cable for power, as well as a card with a QR code to connect with GL.iNet, and a getting started guide in […]

June 25, 2025June 25, 2025 by Debashis Das - 3 Comments

ESP32-Stick-PoE-A-Cam – An ESP32-S3 camera board with active PoE, machine learning examples

Esp32 Stick PoE A Cam(N16R8) ESP32 s3 camera PoE board

The ESP32-Stick-PoE-A-Cam(N16R8) is an open-source ESP32-S3 development board with Ethernet, camera, and active PoE support designed for machine learning applications. Compared to similar boards like M5Stack M5PoECAM-W V1.1 and the Waveshare ESP32-S3-ETH, this board features 17 usable GPIO, active PoE (IEEE 802.3af) with 700mA power delivered, built-in USB-UART, and pin-to-pin compatibility across Stick-Cam boards. Built around the ESP32-S3 SoC, this module supports OV2640 and OV5640 cameras and integrates the W5500 Ethernet controller and Si3404-A PoE chip for power and connectivity. The board has a total of 36 GPIOs, of which 17 are free when using Ethernet and a camera. Applications include remote surveillance, smart home automation, edge AI processing, and other IoT applications. ESP32-Stick-PoE-A-Cam(N16R8) specifications: Wireless module ESP32-S3R8 MCU – ESP32-S3 dual-core LX7 microprocessor @ up to 240 MHz with Vector extension for machine learning Memory – 8MB PSRAM Storage – 16MB SPI flash Connectivity – WiFi 4 and Bluetooth 5 with […]

June 25, 2025June 25, 2025 by Debashis Das - 1 Comment

XIAO W5500 Ethernet Adapter: PoE-enabled ESP32-S3 device aims to improve network reliability

Seeed Studio has recently announced the XIAO W5500 Ethernet Adapter with Power over Ethernet (PoE) support and built around the XIAO ESP32S3 Plus WiFi and Bluetooth module, and a WIZnet W5500 10/100 Mbps Ethernet SPI controller. PoE is implemented through an MQ7813T120 module and a 5V regulator with a TPS563201 buck converter. The XIAO W5500 also features an external 2.4GHz antenna for WiFi and BLE, a reset button, status LEDs, and a USB-C port for power and programming, all enclosed in a 3D printed case. XIAO W5500 Ethernet Adapter specifications: Main Module – XIAO ESP32-S3 Plus module Networking Wireless – External 2.4GHz antenna (2.81dBi) for WiFi and BLE Ethernet W5500 Ethernet controller 10/100 Mbps Ethernet with RJ45 connector Integrated isolated PoE module for data + power USB – USB Type-C connector for power and programming Misc Power and User LED Reset buttons Power MQ7813T120 PoE module with isolation (IEEE 802.3af-compliant); 86% […]

June 9, 2025June 9, 2025 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Arduino UNO SPE Shield adds Single Pair Ethernet and RS485 to Arduino boards

Arduino UNO SPE Shield adds Single Pair Ethernet (SPE) and RS485 to Arduino UNO and compatible boards, notably the Arduino UNO R4, via a Microchip LAN8651 SPE controller. Single Pair Ethernet relies on just two wires to carry data and power, allowing for much more compact designs and simpler wiring compared to traditional RJ45-based solutions with Cat 5 cables. It especially benefits IoT and IIoT applications for buildings, factories, and process automation. Arduino UNO SPE specifications: Networking – Single Pair Ethernet (SPE) via Microchip LAN8651B1 10BASE-T1S MAC-PHY Ethernet Controller with SPI Data rate: 10 Mbit/s over a single balanced pair T1SP and T1SN available on screw terminal block Dedicated T1S SPE connector Maximum Distance – Supports up to 25 meters in multidrop topology (multiple nodes on a single segment) Up to eight nodes in a multidrop network Serial – RS485 via MaxLinear XR33058 Half duplex RS485 Data rate: 20 Mbit/s […]

May 30, 2025May 30, 2025 by Debashis Das - No Comments

DFRobot Edge101 ESP32 industrial IoT controller offers isolated RS485 and CAN Bus interfaces

DFRobot Edge101 is an industrial-grade IoT controller built around the ESP32 MCU, designed as a bridge between development boards and industrial IoT systems. Housed in a full metal enclosure, it comes with various protection features including surge, ESD, lightning, overvoltage, and reverse polarity protection, and supports continuous 24/7 operation in harsh environments. It integrates RS-485, CAN bus, Ethernet, Wi-Fi, Bluetooth, and RTC, and supports expansion via a PCIe slot for 4G LTE cellular communication, making it suitable for automation, environmental monitoring, and remote data acquisition in industrial or outdoor settings. The IoT controller also offers flexible mounting options such as DIN rail or ear mounting. DFRobot Edge101 specifications: Wireless MCU – Espressif Systems ESP32 CPU – Dual-core Tensilica LX6 microcontroller @ up to 240 MHz Memory – 520 KB SRAM, 16 KB RTC SRAM Wireless – WiFi 4 and Bluetooth 4.2 Storage – 4MB SPI NOR flash, MicroSD card slot Connectivity […]