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July 14, 2026 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

IoTLabs wM-Bus gateway – An ESP32 device with Wireless M-Bus connectivity for Home Assistant

IoTLabs wM-Bus Gateway is an ESP32 device supporting the Wireless M-Bus (wM-Bus) standard for receiving data from compatible meters and sensors, designed for full integration with Home Assistant. Wireless M-Bus (Wireless Meter Bus) is a wireless protocol specifically designed for remote reading of smart meters, generally gas, water, or electricity meters, and typically used by utilities, but the wM-Bus gateway allows you to deploy the standard for your home automation solution, meters, and sensors. wM-Bus gateway specifications: Main controller – ESP32 dual-core microcontroller with Wi-Fi and BLE connectivity Display – 1.3-inch OLED for live measurements and status wM-Bus – 868 MHz radio receiver; Semtech SX1276-based RFM95/RFM96 according to the code Supports T1 and C1 frames, compatible with the wmbusmeters library Antennas Built-in 2.4 GHz antenna for Wi-Fi and Bluetooth External SMA antenna for wireless M-Bus; important: must be connected before powering the device to avoid damage Misc Top button to […]

April 22, 2026April 22, 2026 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Raspberry Pi RP2350 board offers NB-IoT cellular connectivity, GNSS, and Wi-Fi indoor location

Raspberry Pi RP2350 board NB-IoT cellular

Challenger+ RP2350 NB-IoT is a Feather-compatible board pairing a Raspberry Pi RP2350 microcontroller and a certified NB-IoT cellular module with built-in GNSS, suitable for long-range, low-power connectivity. It looks to be a variant of the earlier Challenger+ RP2350 WiFi6/BLE5 board that replaces an ESP32-C6 WiFi 6, BLE, and 802.15.4 module with an STMicroelectronics ST87M01 NB-IoT and GNSS module. It still offers Challenger+ RP2350 NB-IoT specifications: Microcontroller – Raspberry Pi RP2350A MCU CPU Dual-core Arm Cortex-M33 processor @ 150MHz Dual-core 32-bit RISC-V processor @ 150MHz Up to two cores can be used at a given time Memory – 520KB internal RAM 8KB OTP Storage Package – QFN-60; 7×7 mm Memory – 8MB PSRAM Storage – 8MB SPI flash Cellular connectivity Module – STMicro ST87M01-1301 LTE Cat NB2 (NB-IoT), 3GPP Release 15 Worldwide regional bands coverage – B1, B3, B5, B8, B20, and B28 Single-tone / Multi-tone / Extended TBS and 2 […]

March 10, 2026 by Jean-Luc Aufranc (CNXSoft) - No Comments

NXP i.MX 93W wireless MPU SiP pairs dual-core Arm Cortex-A55 processor with NXP iW610 WiFi 6, Bluetooth LE, and 805.15.4 radio

NXP i.MX 93W is the company’s first integrated wireless MPU System-in-Package (SiP) and combines a dual-core Cortex-A55 processor (NXP i.MX 93) with an iW610 WiFi 6, Bluetooth LE, and 802.15.4 tri-radio into a single chip. The 14.2 x 12 mm package also includes all the external radio components needed for wireless connectivity, replacing up to 60 discrete components on the PCB. NXP says it reduces the PCB area, simplifies PCB design and regulatory approval, and speeds up time-to-market. NXP i.MX 93W specifications: CPU Dual-Core Arm Cortex-A55 at up to 1.7 GHz Arm Cortex-M33 core at 250 MHz for real-time control GPU – 2D graphics accelerator AI accelerator – Arm Ethos-U65 microNPU Memory I/F – Up to 3.7GT/s 16-bit LPDDR4/LPDDR4X with inline ECC Storage I/F – 2x SD 3.0/SDIO 3.0/eMMC 5.1 Display Interfaces MIPI DSI up to 1080p60 LVDS up to 720p60 24-bit parallel RGB Camera Interface – 2-lane MIPI CSI up […]

February 25, 2026February 25, 2026 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Iridium 9604 3-in-1 IoT module integrates Iridium SBD satellite service, LTE-M cellular connectivity, and GNSS positioning

Iridium Communications has just unveiled the Iridium 9604 3-in-1 IoT module with support for Iridium Short Burst Data (SBD) satellite service, LTE-M cellular connectivity, and GNSS positioning. Solutions relying on satellite, cellular, and/or GNSS positioning are typically implemented using three different chips or modules. For example, the earlier Iridium Certus 9704 Satellite IoT Developer Kit relies on an Iridium 9704 module and a u-blox GNSS module, but the Iridium 9604 module implements everything into a single 26 x 16 mm package, saving up to 60 percent or more in board space and lowering the costs of the final product. Iridum 9604 specifications: Iridium Short Burst Data 340 bytes mobile-originated 270 bytes mobile-terminated Global LEO coverage Cellular LTE-M (CAT-M1) Global band support Carrier certifications FirstNet certification in the US GNSS – GPS, GLONASS, Galileo, BeiDou Antennas Iridium/GNSS antenna LTE-M antenna Host interface – Single interface (not specified, likely UART or SPI) Dimensions – 26 […]

January 28, 2026January 28, 2026 by Jean-Luc Aufranc (CNXSoft) - No Comments

Semtech launches AirLink RX400 and EX400 5G RedCap routers for IoT applications

Semtech has just launched the AirLink RX400 and EX400 5G RedCap routers for industrial and commercial IoT applications. They offer a lower power consumption and lower costs compared to traditional 5G deployment. The routers are powered by an unnamed Arm Cortex-A55 processor, feature up to two Gigabit Ethernet ports, 5G RedCap cellular connectivity (3GPP Release 17 and 5G Standalone) with LTE Cat 4 fallback, dual-band GNSS, optional WiFi 6 connectivity, and optional RS-232 interfaces, among other features. AirLink RX400/RX400 specifications: SoC – Unnamed dual-core Arm Cortex-A55 processor System Memory – 600 MB RAM available to containers Storage – 500 MB flash available to containers Networking AirLink EX400 – 2x Gigabit Ethernet ports AirLink RX400 – Gigabit Ethernet port 5G RedCap (Reduced Capability) cellular connectivity up to 226 Mbps downlink, 120 Mbps uplink, dual SIM (Nano-4FF); 4G LTE fallback Optional dual-band Wi-Fi 6 1×1 MIMO up to 600 Mbps Serial (AirLink RX400 […]

November 26, 2025 by Jean-Luc Aufranc (CNXSoft) - No Comments

AMD Spartan UltraScale+ SU35P FPGA evaluation kit supports Raspberry Pi, Arduino, Mikrobus, and Pmod expansion

AMD’s SCU35 Evaluation Kit is an affordable ($229) development board powered by the AMD Spartan UltraScale+ SU35P FPGA device, which targets low-power industrial, medical, and data center applications requiring I/O expansion and board management capabilities. Designed for headless applications, the board features a 10/100 Mbps Ethernet port and a USB-C port for power, as well as plenty of headers and connectors compatible with off-the-shelf expansion boards or modules, including Arduino UNO headers, two 40-pin Raspberry Pi GPIO headers, two Mikrobus headers, four Pmod connectors, and an HSIO board-to-board connector. AMD SCU35 evaluation kit specifications: FPGA – AMD Spartan Ultrascale+ SU35P (XCSU35P-2SBVB625E) 36K Logic Cells 304 Max Total I/O• Board Management Controller Memory – 1.93 Mb on-chip memory Memory – 64 Mbit HyperRAM Storage 128 Mbit QSPI flash 64 Kbit EEPROM Networking – 10/100Mbps Ethernet RJ45 port Sensor – 3-axis linear accelerometer Expansion Arduino UNO headers 2x 40-pin Raspberry Pi […]

November 19, 2025November 19, 2025 by Jean-Luc Aufranc (CNXSoft) - No Comments

Zigbee 4.0 introduces ”Suzi” Sub-GHz connectivity and security enhancements

The Connectivity Standards Alliance (CSA) has just announced the release of Zigbee 4.0, integrating security and interoperability improvements, as well as the Suzi Zigbee’s Sub-GHz feature operating in the 800 MHz (Europe) or 900 MHz (North America) band for longer range and lower interference compared to the traditional 2.4 GHz band. Highlights of Zigbee 4.0 release: Simplified certification processes Enhanced information exchange for smart home solutions. Formalized Parent Selection, Unique Link Key Monitoring, and Trust Center Connectivity improve network resilience Standardized network-level retries, more reliable data polling for sleepy end devices, and expanded use of APS acknowledgements increase overall network performance and reduce message loss. Sleepy-to-sleepy communication using Coordinated Sample Listening (CSL) allows direct, low-power exchanges between devices, optimizing energy and further extending battery life Security updates aligned with evolving international security standards Dynamic Link Key, Device Interview, and Smart Energy Authentication Level Control for stronger device authentication, selective communication […]

September 11, 2025September 11, 2025 by Debashis Das - No Comments

Quectel KCMCA6S industrial wM-bus modules target smart metering

cnx KCMCA6S series sub GHz Wireless M Bus (WM Bus) modules

Quectel’s KCMCA6S is a series of industrial wireless M-Bus (wM-Bus) modules built around Silicon Labs’ EFR32FG23 chipset. The modules operate in the 868 MHz, 169 MHz, and 433 MHz bands and support the EN13757-4 wM-Bus standard for smart metering and AMI (Advanced Metering Infrastructure) applications. The device features an Arm Cortex-M33 processor, 32 KB of SRAM, 256 KB of flash, and a Sub-GHz transceiver. It supports multiple wM-Bus modes (T, C, S, R, N, F), with dynamic multi-mode switching, flexible frequency configuration, and low-power operation alongside multi-layer security mechanisms. Interfaces include USART, SWD, and GPIOs, with optional EUSART, I²C, and ADC through pin multiplexing. Available in two variants (with or without SAW filter), the module comes in a compact 25.4 × 14.0 × 2.9 mm LCC package for water, electricity, gas, and heat metering systems. Quectel KCMCA6S specifications: MCU- Silicon Labs EFR32FG23 Core – Arm Cortex-M33 core, up to 78 […]