mqtt News - CNX Software - Embedded Systems News

June 5, 2026June 8, 2026 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Erqos EQSP32CE – An industrial IoT ESP32-S3 PLC with Ethernet, RS232, RS485, CAN Bus, DIN Rail support

Erqos EQSP32CE is a DIN rail-mountable industrial IoT PLC based on an ESP32-S3 WiFi and Bluetooth SoC and offering Ethernet, RS-485, RS-232, and CAN bus industrial communication interfaces. The IIoT logic controller also features several protected digital (16x) and analog (8x) inputs, eight current inputs, eight “special mode” analog inputs, and sixteen digital outputs with PWM support. A USB-C port is used for firmware flashing and monitoring, and the PLC takes a wide 7V – 26V DC input voltage and outputs 5V/1A for I/O expansion modules. Erqos EQSP32CE specifications: SoC – Espressif ESP32-S3 dual-core LX7 processor @ 240 MHz with 8MB Flash, 512kB RAM, wireless connectivity (so probably ESP32-S3FN8) Communication interfaces 10/100 Mbps Ethernet RJ45 port Wi-Fi + Bluetooth Low Energy (on ESP32-S3) with internal antenna RS232 (protected) and RS485 half-duplex (protected) with support for Modbus RTU, DMX512, and custom serial protocols CAN Bus (protected) USB – 1x USB-C power for […]

May 26, 2026May 26, 2026 by Debashis Das - No Comments

RAKwireless WisMesh Pi HAT RAK6421 turns your Raspberry Pi 4/5 into a modular Meshtastic gateway

RAKwireless WisMesh Pi HAT RAK6421 meshtasticd HAT for Raspberry Pi

RAKwireless WisMesh Pi HAT RAK6421 is a modular Meshtastic gateway expansion board for Raspberry Pi 4/5 that adds support for the company’s WisBlock ecosystem. Designed for users running meshtasticd (the Linux-native Meshtastic service), it enables scalable, always-on Meshtastic base stations, MQTT gateways, and backbone relay nodes. Unlike other LoRa solutions based on Raspberry Pi, the RAK6421 takes a modular approach. Instead of a built-in radio, it offers two WisBlock IO slots and four sensor slots, allowing users to easily plug in or swap modules. This means you can choose between standard LoRa modules like the RAK13300 or higher-power 1W versions like the RAK13302, without dealing with messy USB adapters or breadboard wiring. RAK6421 WisMesh Pi HAT RAK6421 specifications: Compatibility Raspberry Pi 4, Raspberry Pi 5, and Raspberry Pi Zero 2W SBCs Potentially other SBC with standard 40-pin Raspberry Pi GPIO header (HAT+ compliant) Expansion 2x WisBlock IO slots for LoRa radio […]

May 7, 2026May 7, 2026 by Debashis Das - 4 Comments

HAUI 3Gang Touch Display is a 7-inch wall-mount Home Assistant dashboard with MQTT support

HAUI 3Gang 7-inch Display Wall Mount Dashboard WiFi

The HAUI 3Gang Touch Display is a wall-mount smart home control dashboard designed specifically to run Home Assistant, OpenHAB, Domoticz, or any other web-based home automation dashboard. Built around a Raspberry Pi 3B+ since it’s one of the cheapest options following Pi 4/5 price hikes, the HAUI (Home Assistant User Interface) replaces standard wall switches and fits into a standard single-gang electrical box, while its front panel spans roughly a three-gang footprint, hence the “3Gang” name. It runs a customized version of FullpageOS Linux distribution with a Chromium browser in kiosk mode and includes built-in MQTT integration along with SSH access for advanced users. HAUI Touch Display specifications Main Controller – Raspberry Pi 3B+ Display – 7-inch capacitive touchscreen Connectivity – Wi-Fi on Raspberry Pi (configured via initial setup wizard) Power Input Voltage – 120 VAC ±10% Maximum Current – 1 A Internal USB charger module (Line/Neutral wiring, no ground […]

April 29, 2026 by Debashis Das - No Comments

MoreSense MS-07 – An ESP32-S3 indoor air quality monitor with SEN66 multisensor and Home Assistant support

MoreSense MS-07 CO2 PM NOx VOC Temp and Hum Wifi Sensor

MoreSense MS-07 indoor air quality monitor is built around the Sensirion SEN66 multisensor, powered by an ESP32-S3 microcontroller, and features a 3.5-inch capacitive IPS touchscreen for local data visualization and control. The MS-07 is a direct upgrade to the earlier MS-06, replacing the Sensirion SCD40 used for basic CO₂, temperature, and humidity measurement with the more advanced Sensirion SEN66 multisensor, which adds support for PM1.0, PM2.5, PM4.0, PM10, nitrogen oxides (NOx), and volatile organic compounds (VOCs). Like the previous model, it focuses on local operation and privacy, and supports integration with Home Assistant and Domoticz via MQTT autodiscovery, as well as Homey through the HomeyDuino app. It is typically used in homes, offices, and indoor environments to track air quality, comfort levels, and pollution metrics in real time. MoreSense MS-07 specifications: Microcontroller – ESP32-S3 SoC, dual-core XTensa LX7 @ up to 240 MHz; 512KB SRAM; Integrated 2.4GHz Wi-Fi and BLE Storage […]

February 11, 2026February 12, 2026 by Debashis Das - 3 Comments

Open Stack standalone 4G LTE IoT board runs RTOS on Quectel EC200U LTE module (Crowdfunding)

Open Stack — Standalone 4G LTE IoT & Connectivity Module

Open Stack is a standalone 4G LTE IoT connectivity board designed to run RTOS-based C applications directly on the Quectel EC200U series LTE module, meaning you don’t need an external MCU like Arduino, ESP32, or Raspberry Pi. By removing the MCU, the board reduces power consumption, bill-of-materials (BOM) cost, and physical footprint. The board supports multi-band LTE with GSM fallback, GNSS, and Bluetooth 4.2, as well as IPv4/IPv6 client and server modes. It also includes a USB Type-C port, a Nano SIM card slot, LTE/GNSS/BLE antenna connectors, an OLED information display, status LEDs, control buttons, and a 40-pin Raspberry Pi HAT-compatible GPIO header. Networking support includes TCP/UDP, SSL/TLS, HTTP/HTTPS, MQTT, LwM2M, CoAP, FTP/FTPS, and PPP, making it suitable for asset tracking, industrial monitoring, BLE-to-LTE gateways, remote infrastructure, and always-connected IoT deployments without additional controller hardware. Open Stack specifications: Cellular Module – Quectel EC200U-CN series (EC200UCNAA-N05-SGNSA) module Cellular Connectivity: LTE FDD […]

January 27, 2026January 27, 2026 by Debashis Das - 1 Comment

Meterbit Pixlpal – An open-source ESP32-S3 smart display with 128×64 RGB LED matrix, Hi-Fi audio output (Crowdfunding)

Designed by Meterbit Cybernetics in Nigeria, the Pixlpal is an open-source, ESP32-S3-based 11.25-inch 128×64 RGB LED matrix display designed as a customizable ticker for news, crypto, and smart home notifications, while also offering Hi-Fi audio playback. The device also includes a multi-function rotary encoder for local control, a digital MEMS microphone, and a 3.5 mm headphone output driven by a TI PCM5102A DAC for Hi-Fi audio playback. Pixlpal also provides a USB Type-C OTG port for power and programming, and a USB Type-A adapter port for firmware updates and peripherals. The device targets Smart Home dashboards, desktop information displays, and educational or maker-focused IoT applications. Pixlpal specifications: Wireless Module – Espressif Systems ESP32-S3-WROOM-1 SoC – ESP32-S3 CPU – Dual-core Tensilica LX7 up to 240 MHz with vector extension for AI/ML workloads Memory – 512KB SRAM Storage – TBD Wireless – WiFi 4 802.11b/g/n and Bluetooth 5.0 LE PCB antenna Display – […]

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 […]