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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 […]

July 10, 2026July 10, 2026 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

M5Stack Stamp-C5 – A Tiny ESP32-C5 USB-C board/module with up to 19 GPIO, 3.7V battery support

M5Stack Stamp-C5, also known as the M5Stamp-C5, is a tiny wireless IoT USB-C board based on the Espressif ESP32-C5 RISC-V microcontroller with dual-band WiFi 6, Bluetooth LE, and 802.15.4 (Zigbee/Thread) connectivity. Despite its small size (19.1 x 17.6mm), the module exposes up to nineteen GPIO pins, eleven on standard 2.54mm pitch headers and castellated holes, and eight on an FPC extension connector. The board also supports battery charging and ships with an external IPEX antenna for wireless connectivity, since there’s no built-in antenna. M5Stack Stamp-C5 specifications: Wireless MCU – Espressif Systems ESP32-C5HF4 CPU Single-core 32-bit RISC-V processor @ up to 240 MHz Low-power RISC-V core @ 48 MHz acting as the main processor for power-sensitive applications Memory – 384 KB SRAM on-chip Storage – 320 KB ROM, 4MB SPI flash Wireless Dual-band (2.4/5 GHz) 802.11ax WiFi 6, 802.11b/g/n WiFi 4 backward compatibility WiFi modes: Station mode, SoftAP mode, SoftAP + […]

July 7, 2026July 7, 2026 by Jean-Luc Aufranc (CNXSoft) - No Comments

ESP32-C5 devkit offers 2.8-inch capacitive touch display, dual-band Wi-Fi 6, Bluetooth 5 LE, LiPo battery support

Last week, I wrote about the ESP32-C5-LCD-1.47 as one of the first ESP32-C5 devkits with a built-in display enabling dual-band WiFi 6 connectivity for IoT and HMI projects. However, one reader lamented the lack of touch-capable screens, at which point kwchow pointed to the ESP32-C5-Touch-LCD-2.8 model offering just that by pairing an ESP32-C5 with a 2.8-inch IPS display with capacitive touch and 320×480 resolution. The new board also features a microSD card slot, a USB-C port for power and programming, a built-in microphone and a speaker connector, a few sensors, and various I/Os connectors for expansion. Let’s have a closer look. ESP32-C5-Touch-LCD-2.8 specifications: Wireless module – Espressif Systems ESP32-C5-WROOM-1-N32R8 SoC – ESP32-C5HR8 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 power-sensitive applications Memory – 384 KB SRAM on-chip, 8MB PSRAM Storage – 320 KB ROM Wireless […]

July 3, 2026 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

ESP32-C5 dual-band WiFi 6 and Bluetooth LE IoT board features 1.47-inch color LCD

We’ve covered plenty of connected displays based on ESP32 chips over the years, but the Waveshare ESP32-C5-LCD-1.47 is a little different, since it’s the first to feature an ESP32-C5 chip for dual-band WiFi 6 connectivity. It’s basically based on the ESP32-C6-LCD-1.47 design, but replaces the ESP32-C6 supporting 2.4 GHz WiFi 6 with an ESP32-C5 capable of handling both 2.4 GHz and 5 GHz WiFi 6. Other features mostly remain the same: a 1.47-inch 262K-color display with 320 x 172 resolution, 4MB of flash, an RGB LED, a microSD card slot, and two 9-pin headers for GPIO expansion. Waveshare ESP32-C5-LCD-1.47 specifications: Wireless MCU – Espressif Systems ESP32-C5FH4 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 power-sensitive applications Memory – 384 KB SRAM on-chip Storage – 320 KB ROM, 4MB flash Wireless Connectivity Dual-band (2.4GHz/5 GHz) 802.11ax WiFi […]

July 1, 2026 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Flipper BUSY Bar open-source productivity multitool features LED pixel display, supports Matter connectivity

Flipper has taken a short break from launching wireless hacking tools by introducing the BUSY Bar open-source productivity multitool designed to help people eliminate distractions and be more focused at work. The device features a customizable LED pixel display and a small monochrome OLED back display, synchronizes with work apps, mutes notifications, and supports the Matter protocol for integration with Home Assistant, Apple Home, Google Home, or other Matter-compatible platforms. BUSY Bar specifications: Microcontroller – STMicroelectronics STM32U5 CPU – Arm Cortex-M33 @ 160 MHz Memory – 2.5 MB SRAM Storage – 2 MB Flash Storage – 8 GB eMMC flash Main Display – 6.35-inch RGB LED matrix with 72×16 resolution, 60 Hz refresh rate, 800 nits, adaptive brightness Back Display – 1.54-in monochrome (16 gray scales) OLED with 160×80 resolution, adaptive brightness Audio – 0.8W speaker for sound alerts and notifications Wireless Connectivity via Silicon Labs SiWG917 CPU – Arm […]

June 30, 2026June 30, 2026 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

XIAO nRF54LM20A (Sense) board enables ultra-low-power Bluetooth 6.0, Matter, Thread, Zigbee, or 2.4 GHz proprietary applications

Seeed Studio XIAO nRF54LM20A and XIAO nRF54LM20A Sense are tiny USB-C IoT boards based on Nordic Semiconductor’s nRF54LM20A wireless SoC offering Bluetooth 6.0, Matter, Thread, Zigbee, NFC, Amazon Sidewalk, and 2.4 GHz proprietary connectivity. Both variants come with on-chip 2 MB flash and 512 KB RAM, as well as an 8 MB flash, an nPM1300 PMIC for power management, up to 28 GPIOs, and an RGB LED. The Sense model adds a digital microphone and 6-axis IMU with motion-triggered wake-up for ultra-low power applications. XIAO nRF54LM20A (Sense) specifications: Wireless SoC – Nordic Semiconductor nRF54LM20A CPU Arm Cortex-M33 application processor clocked at up to 128 MHz RISC-V coprocessor running at 128 MHz Memory – 512 kB of RAM Storage – 2 MB of Non-Volatile Memory (NVM) Wireless Bluetooth LE 6.0 with PHY rates of 125 kbit/s, 500 kbit/s, 1 Mbit/s, and 2 Mbit/s Bluetooth Channel Sounding, Bluetooth LE long range (coded PHY), […]

June 29, 2026 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Waveshare ESP32-C6-Zero-B – A tiny ESP32-C6 USB-C board with 5V-36V wide supply voltage

ESP32-C6 board 5-36V wide supply voltage

Waveshare ESP32-C6-Zero-B is a variant of the company’s ESP32-C6-Zero USB-C board that adds 5V-36V wide supply voltage support for industrial applications It’s based on the ESP32-C6FH8 wireless RISC-V SoC with 8MB flash, 2.4 GHz WiFi 6, Bluetooth 5.x LE, and an 802.15.4 radio for Zigbee and Thread. It also exposes up to 20 GPIOs via headers and pads, and features an RGB LED, as well as Boot and Reset buttons. Waveshare ESP32-C6-Zero-B specifications: SoC – Espressif Systems ESP32-C6FH8 CPU Single-core 32-bit RISC-V clocked up to 160 MHz Low-power RISC-V core @ up to 20 MHz Memory – 512KB SRAM Storage – 320KB ROM, 8MB flash Wireless – 2.4 GHz WiFi 6, Bluetooth 5.3, and 802.15.4 radio for Thread/Zigbee USB – USB Type-C port for program download and debugging Expansion 2x 9-pin headers with up to 13x GPIOs, UART, I2C, SPI, 6x ADC, I2S, PWM, Vin, 3.3V out, GND 7x solder pads […]

June 29, 2026June 29, 2026 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Simplia CONNECT RW612 6-in-1 M.2 2230 module offers WiFi 6, Bluetooth 5.4, 802.15.4, LTE-M, NB-IoT, and GNSS connectivity

Simplia CONNECT RW612 6-in-1 M.2 wireless module

Simplia CONNECT RW612 is a 6-in-1 M.2 2230 wireless module that offers dual-band WiFi 6, Bluetooth 5.4 LE, an 802.15.4 radio for Zigbee or Thread, LTE Cat-M, NB-IoT, and GNSS connectivity. It’s the first module I’ve seen that implements so many wireless standards into a tiny M.2 2230 module. It’s made possible by combining an NXP RW612 WiFi, BLE, and 802.15.4 module with an optional Quectel BC77 LTE-M, NB-IoT, and GNSS module. Simplia CONNECT RW612 specifications: Wireless modules Murata Type 2FR (LBESOZZ2FR) SoC – NXP RW612 CPU – Arm Cortex-M33 @ 260 MHz Memory – 1.2 MB SRAM Wireless Dual-band Wi-Fi 6 (802.11ax) 1×1 SISO Bluetooth LE 5.4 802.15.4 radio for Thread and Zigbee Storage – 16MB or 32MB integrated flash memory via FlexSPI Security – NXP EdgeLock Package – 12.0 x 11.0 x 1.5 mm (BGA) Optional Quectel BG77 (BG77LA, similar to the BG770A minus 5G NTN support) LTE […]