mqtt News - CNX Software - Embedded Systems News

December 10, 2025December 10, 2025 by Debashis Das - No Comments

52Pi UPS Gen 6 UPS for Raspberry Pi 4/5 supports up to 4x external battery packs, PikaPython scripting

Rapsberry Pi 5 UPS with four external battery packs

The 52Pi UPS Gen 6 is another UPS solution for the Raspberry Pi 5 that supports external battery packs for long-duration projects, and uses I²C plus PikaPython scripting to manage power settings and safe shutdowns. Designed for the Raspberry Pi 5 and 4B, the module mounts on the bottom of the board and delivers power via pogo pins. It also includes an aluminum heatsink with an automatic fan for cooling. It runs on two 18650 batteries, which can be mounted to the Pi with spacers, and there is an option to add three more battery packs in parallel if you need longer runtime. The board also features a physical power button for manual control, a 12V power interface for SATA hard drives, and switching hardware (bumpless power transfer) that instantly falls back to battery power so the system stays on during a power outage. 52Pi UPS Gen 6 specifications: Main […]

November 29, 2025November 30, 2025 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

SMHUB Nano Mg24 compact Linux-based Zigbee/Thread Smart Hub combines SG2000 RISC-V SoC with MG24 wireless MCU

SMLight’s SMHUB Nano Mg24 may look like the company’s earlier SLZB-06p Zigbee to Ethernet/WiFi/USB coordinators, but it’s a more powerful Linux-based Zigbee/Thread Smart Hub that pairs SOPHGO SG2000 RISC-V SoC with Silicon Labs MG24 multi-protocol wireless MCU. Unlike traditional Zigbee/Thread adapters that connect to a host through USB or Ethernet, the SMHUB Nano Mg24 is an all-in-one solution that runs all major automation apps directly on the device, eliminating the need for a Raspberry Pi, Mini PC, or other hardware server. SMHUB Nano Mg24 specifications: SoC – SOPHGO SG2000 CPU cores 1x C906 64-bit RISC-V core @ 1GHz or 1x Arm Cortex-A53 core @ 1GHz (selectable at boot) 1x C906 64-bit RISC-V core @ 700MHz MCU – 8051 8-bit microcontroller core @ 25 to 300 MHz with 6KB SRAM GPU – None VPU – H.265/H.264 video decoding and encoding (5M @ 30fps) ISP – 5M @ 30fps NPU – 0.5 TOPS Memory […]

November 15, 2025November 15, 2025 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

FireBeetle 2 ESP32-C5 IoT development board offers GDI display interface, LiPo battery support

Just the other day, I lamented the lack of options when it came to ESP32-C5 boards featuring dual-band WiFi 6 support. The FireBeetle 2 ESP32-C5 IoT development board made by DFRobot shows that I needed to be more patient… The ESP32-C5 board features 4MB flash, a USB-C port, a LiPo battery connector, and two GPIO headers for expansion, as well as a GDI display connector designed to add an SPI/I2C touchscreen display. The new RISC-V board has about the same features and form factor as the FireBeetle 2 ESP32-S3. It adds 5 GHz WiFi and an 802.15.4 radio for Zigbee, Thread, and Matter, but loses a camera connector, and comes with less memory and storage. FireBeetle 2 ESP32-C5 specifications: Wireless module – ESP32-C5-WROOM-1-N4 SoC – Espressif Systems ESP32-C5 CPU Single-core 32-bit RISC-V processor @ up to 240 MHz Low-power RISC-V core @ 40 MHz acting as the main processor for […]

September 12, 2025 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

WiFIRCard – A credit card-sized WiFi and IR-controlled dual relay board (Crowdfunding)

WiFIRCard is a credit card-sized ESP32-S3 board designed for home automation with two relays and a few GPIOs (headers and screw terminals) that can be controlled over WiFi 4 or an IR (infrared) remote control. The board also features a microSD card slot for data logging or other storage uses, a buzzer for audio feedback, a USB-C port for power and programming, and a few buttons and LEDs. WiFiRCard specifications: Wireless module – ESP32-S3-WROOM-1 with Xtensa® LX7 dual-core 32-bit SoC – Espressif Systems ESP32-S3 CPU – Dual-core Tensilica LX7 up to 240 MHz with vector extension for AI/ML workloads RAM – 512KB SRAM, up to 8MB PSRAM Storage – Up to 16MB flash Wireless – WiFi 4 and Bluetooth LE 5 Antenna – PCB antenna Storage – MicroSD card slot for data logging/storage USB – 1x USB Type-C port for power and programming Relays 2x HLS8L-DC5V-S-C relays 10A/250V AC, 15A/120V AC, […]

August 19, 2025August 20, 2025 by Debashis Das - 4 Comments

ESP32 Modbus gateway handles RTU, TCP/IP, and MQTT for industrial IoT

Designed by Namnam in Vietnam, the ESP32 Modbus gateway is built to communicate with PLCs and industrial sensors over Modbus RTU (RS-485) or Modbus TCP/IP (Ethernet/Wi-Fi). Designed for use in farms, factories, and electrical cabinets where reliable communication, remote monitoring, and control are required. Key features of this industrial IoT board include Modbus RTU/TCP master and slave support, automatic Wi-Fi/Ethernet switching, multi-Wi-Fi handling, watchdog timer, deep sleep, and FOTA updates via FTP. The board supports a wide input voltage range and can be programmed over USB. ESP32 Modbus gateway specifications Wireless Module – ESP32-WROOM-32 module with ESP32 dual-core processor @ 160 MHz, 520 Kbytes SRAM, 4 Mbit Flash Connectivity 10/100Mbps Ethernet RJ45 port via LAN8720A controller Wifi and WiFi 802.11 b/g/n, Bluetooth 4.2 via ESP32 RS485 – SP485EE transceiver (Serial2, auto DERE) USB – USB Type-C port for programming and power Misc Onboard Red, Blue, and Pwr LED User and […]

June 20, 2025November 12, 2025 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

AI-On-The-Edge-Cam ESP32-S3 board aims to digitize legacy utility meters

AI-On-The-Edge-Cam is an ESP32-S3 board with a 2MP camera, microSD card, WiFi, BLE, and PoE Ethernet connectivity designed to digitize legacy utility meters such as water meters, gas meters, or electricity meters that require manual onsite reading. AI-On-The-Edge-Cam is also the name of the firmware running on the board and was initially designed for the ESP32-CAM board. But the new board adds a few features that make it more versatile, like PoE support and a microSD card slot for storage, as well as RGB LEDs acting as a flash to allow meter reading at any time of the day or night. AI-On-The-Edge-Cam specifications: Wireless module – ESP32-S3-WROOM-1U-N16R8 SoC – Espressif Systems ESP32-S3 CPU – Dual-core Tensilica LX7 up to 240 MHz Memory – 512KB SRAM, up to 8MB PSRAM Storage – 16 MB flash Wireless – WiFi 4 and Bluetooth LE 5 IPEX antenna connector Storage – microSD card slot […]

April 28, 2025April 28, 2025 by Debashis Das - 2 Comments

Waveshare 8-channel RS485 to Ethernet industrial serial servers work as a Modbus & MQTT gateways, RS485-to-JSON converters

Industrial Isolated 8 Ch RS485 to RJ45 Ethernet Serial Server

Waveshare has launched the 8-Channel RS485 TO ETH (B) and 8-Channel RS485 TO POE ETH (B) industrial Ethernet serial servers designed for bi-directional transparent data transmission between RS485 and Ethernet networks. The only difference is PoE support, one has it, the other doesn’t, recognizable by their names. It features eight RS485 channels that operate independently, and supports two Ethernet ports (with an optional PoE version compliant with IEEE 802.3af). Key features include working as a serial server, Modbus gateway, MQTT gateway, and RS-485 to JSON converter. It also supports protocols like TCP, UDP, HTTP, DHCP, DNS, and more. It works in the industrial temperature range (-40°C to 85°C), offers power and signal isolation, 2kV surge protection, and comes housed in a durable aluminum alloy enclosure. Additionally, it supports wall-mount or rail-mount installation, multiple power supply methods (DC 7–36V via screw terminal or PoE), and web browser/device library configuration. These features make […]

April 26, 2025April 26, 2025 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Air Lab is a portable Wi-Fi & Bluetooth LE air quality monitor with an e-paper touchscreen display (Crowdfunding)

Networked Artifacts’ Air Lab is a portable air quality monitor based on ESP32-S3 Wi-Fi & Bluetooth LE wireless SoC, equipped with an e-paper touchscreen display, and plenty of sensors to measure CO2, temperature, relative humidity, air pollutants (VOC, NOx), and atmospheric pressure. The Air Lab ships with a rechargeable 1,500 mAh battery that will be good for about 21 days on a charge in passive mode (taking measurements every minute), and you can also power it over its USB-C ports. It includes a debug port for people wanting to change the firmware, and a GPIO header to connect additional sensors if required. Data can be visualized on the e-paper display or transmitted over BLE or MQTT for integration with Home Assistant. The company also provides a CSV export function and a web-based dashboard for data visualization. Air Lab specifications: Main module – ESP32-S3 module with PCB antenna for 2.4GHz WiFi […]