Arduino MKR IoT Carrier board
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Arduino MKR IoT Carrier embeds display, sensors, and I/Os for IoT projects

Arduino Oplà IoT Kit was launched last fall as the first open programmable IoT platform from the company. The kit included everything you need to create your own IoT devices with MKR IoT carrier with a 1.3-inch OLED color display,  environmental sensors, capacitive touch buttons, Arduino MKR WiFi 1010 board, external PIR motion and moisture sensors, a circular plastic enclosure, and various cables. But the community soon wanted to only buy the carrier board without having to purchase the whole kit, so Arduino has just started to sell MKR IoT Carrier board as a standalone product. Arduino MKR IoT Carrier features & specifications: Compatible with Arduino MKR family boards with WiFi, LoRa, NB-IoT, or 3G cellular connectivity Storage – MicroSD card holder Display – Round 1.3-inch OLED display I/Os 2x 24V relays 3x Grove connectors include two analog and one digital (I2C) Sensors  – Temperature, humidity, pressure, RGBC light, gesture […]

ZSWatch open-source hardware nRF52833 smartwatch
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ZSWatch open-source hardware nRF52833 smartwatch runs Zephyr RTOS

ZSWatch is an open-source hardware smartwatch based on an u-Blox ANNA-B402 module with Nordic Semi nRF52833 Bluetooth 5.1 SoC and running Zephyr real-time operating systems. We’ve seen several open-source hardware smartwatches over the years, as well as open-source firmware projects such as AsteroidOS or InfiniTime with the latter used in the PineTime smartwatch, and the ZSWatch adds to the list of interesting open-source wearables with all source files made public. ZSWatch specifications: Wireless module – u-blox ANNA-B402 based on Nordic Semi nRF52833 Arm Cortex-M4F microcontroller with Bluetooth LE 5.1 and direction finding support Storage – 8MB flash (MX25R6435FZNIL0) Display – 1.28-inch 240×240 IPS TFT circular display with GC9A01 driver; covered with Sapphire Crystal Glass. Sensors Accelerometer (LIS2DS12TR) for step counting, etc… MAX30101EFD for pulse oximetry and heart rate monitoring Misc 3x buttons for navigation (prev, next, enter) Vibration motor (DRV2603RUNT) with haptics driver to give better vibration control. Power Management […]

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MIMXRT595-EVK
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NXP i.MX RT500 Cortex-M33 Crossover MCU integrates DSP, 2D GPU for wearables and IoT devices

NXP i.MX RT500 is the second Cortex-M33 Crossover MCU following the NXP i.MX RT600 Series announced in 2018, and optimized for low-power HMI applications such as wearables and Smart Home & IoT devices. NXP Crossover MCUs are typically clocked at 600 MHz or more, but NXP i.MX RT500 Cortex-M33 is limited to 200 MHz, and combined with 200 MHz Tensilica Fusion F1 DSP as well as a 2D GPU, and power optimizations that enable long battery life of up to 40 days on a charge for wearables like smartwatches. NXP i.MX RT500 key features and specifications: MCU Core – Cortex-M33 @ up to 200 MHz with Arm TrustZone, M33 built-in Memory Protection Unit (MPU), PowerQuad hardware accelerator for DSP functions, CASPER crypto coprocessor for asymmetric cryptographic algorithms DSP Core – Cadence Tensilica Fusion F1 DSP @ up to 200 MHz On-Chip Memory Up to 5 MB of system SRAM accessible […]

Huawei HarmonyOS Tablet - MatePad Pro 10.8
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HarmonyOS launched on Huawei MatePad tablets, Watch 3 smartwatches

Huawei plans for an Android alternative called HongMeng (鸿蒙) OS were leaked in 2019 following tensions with the US government that prevented them from working with American and other companies around the world. The operating system was later called HarmonyOS for the overseas markets, and Huawei released HarmonyOS 2.0 beta in September of last year, where we learned it was heavily inspired by Android, replacing Google GMS with Huawei’s own HMS, but using the same development tools. We also got a roadmap at the time with the company planning to launch HarmonyOS devices in 2021. Developers first got the HiSpark WiFi IoT RISC-V development board to play with the new OS in October 2020, but now the company has finally announced HarmonyOS consumer devices with three Huawei MatePad tablets, and two Huawei 3 watches. Huawei MatePad HamornyOS tablets Three models have been introduced with a mix of Kirin and Snapdragon […]

PhaseLatch Mini modular Software Defined Radio platform
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PhaseLatch Mini – An STM32-based low-cost SDR digitizer with two 12-bit ADCs, 210 kS/s USB streaming

PhaseLatch Mini is a low-cost STM32-based SDR digitizer for the previously released Phase Loom (tuner aboard), built in a Blue Pill–style form factor for HF, FM, and VHF experimentation. The board uses two 12-bit ADCs that sample I and Q at the same time, combine both readings into a 32-bit data word, and send the data over USB at about 210,000 I/Q sample pairs per second using just the standard USB CDC interface. It includes SMA inputs, a built-in ~100 kHz low-pass filter network, USB-C connectivity, ferrite-filtered power, and dedicated 8 MHz/32.768 kHz crystals for stable timing. Other features of the board include dynamic timer tuning, circular DMA, ISR-driven packet chaining, and a lock-free USB feed path to maintain high-rate streaming. PhaseLatch Mini specifications: Microcontroller – ST STM32F103C8 Arm Cortex-M3 @ 72 MHz USB Interface – USB-C 2.0 (Full-Speed) port; CDC class; RAW vendor class planned ADC subsystem Dual simultaneous […]

Espressif EchoEar Smart AI Development Kit
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Espressif’s EchoEar ESP32-S3 voice-controlled AI chatbot runs esp-brookesia firmware

Espressif Systems’ EchoEar is a compact ESP32-S3 AI chatbot designed for voice interaction and edge AI applications, for smart toys, voice-enabled speakers, and control systems. It features a 1.85-inch circular touch display, a dual microphone array with local wake-word detection, and support for large AI models from OpenAI, Xiaozhi AI, and Gemini. The kit is built around the ESP32-S3-WROOM-1 Wi-Fi 4 and Bluetooth 5 module, and also integrates a 3W speaker for audio interaction, and a microSD card slot for data storage. Other hardware features include a BMI270 IMU, a green LED, a USB-C port, a magnetic connector, and a battery management chip. Espressif EchoEar Specifications Wireless Module – ESP32-S3-WROOM-1 SoC – Espressif Systems ESP32-S3R8 CPU – Dual-core Tensilica LX7 up to 240 MHz with vector extension for AI/ML workloads RAM – 512KB SRAM, 8MB PSRAM ROM – 284KB Wireless – WiFi 4 and Bluetooth LE 5 Storage – 16MB […]

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Destore Citronics Fairphone 2 industrial gateway
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Citronics built a router based on the Fairphone 2 mainboard

Belgium-company Citronics has designed a router based on the mainboard of the Fairphone 2 smartphone, connecting the Qualcomm Snapdragon 801 “system-on-module” to a carrier board with Ethernet, USB ports, and other connectors, while leveraging 4G LTE, WiFi, and Bluetooth connectivity from the phone’s core board. Citronics calls this type of hardware “Circular Microcomputers,” which refers to small computers focusing on sustainability and circular economy principles using parts from discarded devices like old smartphones. There’s actually more than one router, as Citronics designed its own development kit, and also partnered with other companies to design custom gateways based on the Fairphone 2 mainboard. Let’s have a look at the devkit first. Citronics devkit: Fairphone 2 mainboard SoC – Qualcomm Snapdragon 801 (MSM8974AB) quad core Krait 400 processor @ up to 2.26 GHz with Adreno 330 GPU System Memory – 2 GB LPDDR3 Storage – 32GB eMMC flash Connectivity – 2G/3G/4G LTE, […]

Waveshare 0.71inch DualEye LCD Module
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Waveshare Double Eye LCD module is a high-tech alternative to googly eyes

Waveshare has recently launched the Double Eye LCD module (also known as the 0.71inch DualEye LCD module), a high-tech alternative to googly eyes, with two 0.71-inch round IPS displays with 160×160 pixels of resolution and 65K color depth. It uses the GC9D01 driver and communicates via an SPI interface. The module operates at a 3.3V or 5V and is designed so that both ESP32 and Arduino boards can drive it. These features make this device useful for applications like wearables, robotics, IoT devices, etc… Waveshare Double Eye LCD module specifications: Display Type – Dual 0.71-inch round LCD displays Resolution – 160×160 pixels Panel – IPS (wide viewing angle) Colors – 65K colors Pixel Pitch – 37.5 × 112.5 µm Controller and Driver Driver – GC9D01 Interface – SPI Operating Voltage – 3.3V / 5V Dimensions Display – 18 mm ∅ per round LCD Module  – 51 x 20 mm The […]

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