ESP32 OpenMQTTGateway smart plug acts as an BLE MQTT gateway and a power meter

ESP32 BLE Gateway Power Meter

The Theengs Plug ESP32 smart plug runs OpenMQTTGateway firmware to serve as a BLE MQTT gateway and power meter compatible with Home Assistant, Homebridge, OpenHAB, DomoticZ, FHEM, Jeedom, NodeRed, AWS, and any MQTT-compatible IoT or Smart Home system. While the Matter standard should improve interoperability between Smart Home frameworks over time, there are still millions of devices already produced that are not Matter compatible, and the Theengs Plug aims to at least partially address this issue by helping users reduce the number of hubs required and have only one that supports different ecosystems. Theengs Plug hardware specifications: Microcontroller – ESP32 dual-core wireless MCU with 2.4 GHz WiFi and Bluetooth LE connectivity Network Protocol – MQTT Power Supply – 100-120VAC, 60Hz, up to 15A Dimensions – 103 x 61 x 34.6mm Temperature Range – Operating: 0ºC ~ 40ºC; storage: -10°C ~ 50°C Humidity – 0%~95% (no condensation) Certification – UL Some […]

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 […]

Walter ESP32-S3 board supports NB-IoT, LTE-M, and GPS

QuickSpot Walter is an ESP32-S3 development board with built-in WiFi 4 and Bluetooth LE/Mesh connectivity, as well as NB-IoT, LTE-M, and GNSS support through a Sequans GM02SP 5G IoT modem that appears to be a variant of the Sequans Monarch 2 GM02S with GNSS support. Walter specifications: Wireless modules ESP32-S3-WROOM-1-N16R2 module ESP32-S3 dual-core LX7 microcontroller 2MB QSPI PSRAM 16MB QSPI flash 802.11 b/g/n WiFi 4 up to 150 Mbps  with on-board antenna Bluetooth 5 LE up to 2Mbps, Bluetooth Mesh Sequans GM02SP modem LTE Cat M1 (LTE-M) and NB1/NB2 (NB-IoT) GNSS and assisted GNSS using GPS and Galileo constellations NanoSIM for cellular connectivity I/Os 2x 14-pin headers with up to 24x GPIO, UART, VIN, 3.3V, and GND 23x test points 3.3V I/O voltage Power Supply 5V (3.0 to 5.5V) DC via VIN pin 5V via USB Type-C port Dimensions – 55 x 24.8 mm Temperature Range – -40°C to +85°C […]

Merlot is an open-source hardware tricolor wireless E-paper display Merlot is a tricolor E-paper display with an open-source hardware control board based on ESP32 wireless SoC that is programmable with Arduino, MicroPython, or the ESP-IDF framework. We first wrote about the 4.2-inch ESP32-based monochrome e-Paper display last year, but the company has now refined its design with the “ Classic” replacing the 3D printed enclosure with a vacuum cast enclosure and adding a 1,900 mAh battery. They also launched a new model, the Merlot, based on the same design but with a display supporting three colors: black, white, and red. Merlot specifications: Wireless module – ESP32-WROOM-32 module with ESP32 dual-core processor, 4 MB SPI flash, 2.4 GHz WiFi 4 & Bluetooth LE connectivity Storage – MicroSD card slot for storing images, files, etc Display – 4.2″ tricolor e-Paper display with 400 x 300 resolution; full refresh: ~ 17 seconds; partial update: also 17 seconds… USB – 1x […]

OpenPLC open-source Programmable Logic Controller Suite works with Arduino, ESP8266/ESP32, Raspberry Pi, etc.

OpenPLC is an open-source, free-to-use Programmable Logic Controller Suite, compliant with the IEC 61131-3 standard, and working with a range of hardware platforms such as Arduino, ESP8266/ESP32, Raspberry Pi SBCs, as well as Windows and Linux machines. When Arduino unveiled the Arduino PLC IDE, we noted the languages defined by the IEC 61131-3 standard were licensed, and the PLC key for the Portenta Machine Control unit sold for $17.60. One reader complained about the high license cost per device, but Massimo Banzi, the co-founder of the Arduino project, replied it was cost-effective for smaller deployments: Actually it’s not that much money compared to the cost of other PLC software (thousands of dollars per seat!). This model helps small companies with not that many devices.. It’s possible to negotiate bulk licenses for companies. But there’s also another option with OpenPLC open-source PLC suite that does not require any license fee. That’s […]

Olimex AgonLight2 8-bit open-source hardware computer sells for 50 Euros

Olimex has started to take pre-orders for the AgonLight2, a customized version of the Agon Light 8-bit open-source hardware computer based on the Z80 family and running BBC Basic. Bernardo Kastrup and Dean Belfield created the Agon light 8-bit retro computer with VGA and PS2 keyboard port and programmable with BASIC earlier this year and released all hardware design files, the firmware, and documentation on GitHub, and Dean uploaded a one-hour-long video on YouTube. It was designed with EasyEDA, but Olimex re-captured the design in KiCad after getting customer requests, and the new cost-optimized board named AgonLight2 will start shipping by the end of January 2023. AgonLight2 specifications: MCU – Zilog eZ80F92 8-bit microcontroller @ 18.423 MHz with 128 KB flash, 256 bytes configuration Flash memory, 8 KB SRAM (See PDF datasheet for details) System Memory – 512KB, 10ns, parallel SRAM Storage – MicroSD card socket Terminal subsystem MCU – […]

UniHiker education platform teaches STEM with Mind+ and Jupyter (in China)

DFRobot UniHiker is a STEM education platform with a 2.8-inch touchscreen display, a Rockchip RK3308 quad-core Cortex-A35 processor, a GD32V RISC-V microcontroller, WiFi and Bluetooth connectivity, as well as various headers for expansion, and a BBC Micro:bit compatible edge connector. The UniHiker runs Debian 10 Linux and can be used to teach programming using Mind+ visual programming IDE or Jupyter open-source interface, as well as IoT and AI basics thanks to tutorials and lessons available in Chinese only as the platform clearly targets the education market in mainland China at this point in time.   Unihiker specifications: SoC – Rockchip RK3308 Quad-core Arm Cortex-A35 processor @ 1.2GHz with MCU – Gigadevice GD32VF103C8T6 RISC-V microcontroller @ 108MHz with 64KB flash, 32KB SRAM System Memory – 512MB DDR3 Storage – 16GB eMMC flash, MicroSD card socket Display – 2.8-inch touchscreen color display with 320×240 resolution Connectivity – 2.4 GHz Wi-Fi & Bluetooth […]

TinyLlama x86 retro computer uses the Raspberry Pi Zero 2 W as a MIDI synthesizer

The TinyLlama x86 retro computer board is designed to run DOS games on a DM&P Vortex86EX 32-bit x86 processor and integrates a MIDI synthesizer based on Raspberry Pi Zero 2 running MT32-Pi firmware. Growing up playing games on 386/486-era computers, Eivind Bohler looked for similar recent hardware to play DOS games and after discovering the 86Duino x86 Arduino-compatible board, he decided to use the SOM-128-EX module powering the board to create the TinyLlama board with a Sound Blaster Pro-compatible Crystal CS4237B sound chip and a MIDI synthesizer. TinyLlama specifications: D&MP SOM-128-EX system-on-module with Processor – DM&P Vortex86EX 32-bit x86 processor @ 60 to 500 MHz System Memory – 128MB DDR3 Storage – 8MB SPI flash Storage – MicroSD card socket Video Output – VGA up to 1024×768 @ 60 Hz using the Vortex86VGA module running off an x1 PCI-e lane Audio Crystal CS4237B all-in-one audio chip MIDI synthesizer with Raspberry Pi […]