low power News - Page 4 of 41 - CNX Software

August 12, 2024August 19, 2024 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Challenger+ RP2350 WiFi6/BLE5 board combines Raspberry Pi RP2350 MCU with ESP32-C6 WiFi 6 and Bluetooth 5.4 LE module

Raspberry Pi RP2350 board ESP32-C6 WiFi module

You don’t need to wait for the Raspberry Pi Pico 2 W to get a Raspberry Pi RP2350 board with WiFi and Bluetooth thanks to the Challenger+ RP2350 WiFi6/BLE5 board that combines an RP2350A microcontroller with an ESP32-C6 module offering 2.4 GHz WiFi 6 and Bluetooth 5.4 LE connectivity. The board follows the Adafruit Feather form factor with 28-pin through holes for I/Os making it compatible with FeatherWings add-on boards. It comes with a USB-C port for power and programming, and a JST connector plus a charging circuit for people wanting to connect a LiPo battery. Challenger+ RP2350 WiFi6/BLE5 specifications: Microcontroller – Raspberry Pi RP2350A MCU CPU Dual-core Arm Cortex-M33 processor @ 150MHz Dual-core 32-bit RISC-V processor @ 150MHz Only 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 […]

August 12, 2024 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

$49 Rejeee multiple external temperature sensor for LoRaWAN ships with three DS18B20 temperature sensors

The “Rejeee multiple external temperature sensor for LoRaWAN” is a LoRaWAN solution for temperature sensing that includes three waterproof DS18B20 temperature sensors that could be useful for cold storage, kitchen, and greenhouse monitoring. The device has a waterproof design that can withstand moisture and wet environments, is equipped with sensors measuring temperature within the -40°C to 125°C range, plus low-power LoRaWAN connectivity and Lithium AA batteries that can last up to five years when sending data every 10 minutes. Rejeee multiple external temperature sensor for LoRaWAN specifications: Microcontroller – Unnamed Arm Cortex-M MCU; potentially STMicro STM32L151 Cortex M3 @ 32 MHz based on another temperature sensor from Rejeee. LoRaWAN Data Rate – 300 bps ~ 62.5 kbps Transmit Power – 22 dBm Max. Receiver Sensitivity – -140 dBm (BW = 125 kHz, SF12) Operating Frequency – LF: 433 ~ 510 MHz; HF: 863 ~ 928 MHz Bands EU868, IN865, RU864 […]

August 9, 2024August 19, 2024 by Jean-Luc Aufranc (CNXSoft) - No Comments

XIAO RP2350 is a tiny USB-C board based on Raspberry Pi RP2350 MCU

The XIAO RP2350 is an upgrade to Seeed Studio’s XIAO RP2040 board with a more powerful Raspberry Pi RP2350 dual-core Cortex-M33 or dual-core RISC-V microcontroller found in the just-launched Raspberry Pi Pico 2 board. The new Raspberry Pi RP2350 USB-C board has the same form factor but adds eight more GPIOs on the bottom with pads for a total of 19 GPIOs, and we lose two LEDs for serial port connectivity. Most people will still be fine with the XIAO RP2040, but if you need a more powerful microcontroller, extra memory, a few extra GPIOs, and built-in security, then the XIAO RP2350 will be an improvement. XIAO RP2350 specifications: Microcontroller – Raspberry Pi RP2350 MCU CPU – Dual-core Arm Cortex-M33 processor @ 150MHz (Note: again RISC-V is not mentioned at all by Seeed Studio, like for the Cytron MOTION 2350 Pro board) Memory – 520KB internal RAM 8KB OTP Storage […]

August 6, 2024 by Tomisin Olujinmi - No Comments

SparkFun Thing Plus – NORA-W306 – A dual-band Wi-Fi 4 and BLE 5.3 IoT board

SparkFun Thing Plus – NORA-W306, is a dual-core, dual-band WiFi 4 and BLE 5.3 microcontroller board in the AdaFruit Feather form factor based on the u-box NORA-W306 module and targeted at low-power wireless applications. The u-blox module integrates the Realtek RTL8720DF chip, a dual-core ARM Cortex-M33 and Cortex-M23 microcontroller with dual-band Wi-Fi (2.4GHz and 5GHz) and Bluetooth 5.3 Low Energy. It offers up to 4MB of encrypted flash and has an onboard PCB antenna. It’s very similar to the RealTek RTL8720DN we covered a few times in the past, but comes with embedded flash. The SparkFun Thing Plus – NORA-W306 board features a USB-C connector for programming, data, and power. The USB data lines are protected against electrostatic discharge and are connected to a CP2102N USB-to-serial converter for uploading code or serial. This board includes a 2-pin JST-style connector for a LiPo battery, a single-cell charger, and a LiPo fuel […]

July 24, 2024August 30, 2024 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

LILYGO T-Halow is an ESP32-S3 board with long-range WiFi HaLow, OV2640/OV5640 camera support

LILYGO T-Halow is an ESP32-S3 board equipped with a WiFi HaLow module with up to 1.2km range, a connector compatible with OV2640 and OV5640 camera modules, and an 18650 battery holder for power, as well as several GPIOs for expansion. We first wrote about 802.11ah low-power long-range WiFi standard operating at 900 MHz in 2014, but adoption has been slow and we’ve seen a few 802.11ah (WiFi HaLow) chips from Newracom and Morse Micro over the years, as well as USB adapters, a Raspberry Pi HAT, a mini PCIe card, gateways, and some development boards. All those rely on a Linux host, but the LILYGO T-Halow features a TX-AH WiFI HaLow module from Taixin Semiconductor that’s controller by AT commands through an ESP32-S3 or a micro USB port. LILYGO T-Halow specifications: Wireless modules ESP32-S3-WROOM-1 wireless module SoC – ESP32-S3 dual-core Tensilica LX7 microcontroller @ up to 240 MHz with 2.4 […]

July 20, 2024July 23, 2024 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

The Blette Stick relies on Bluetooth 5.0 LE for off-grid messaging with up to 1.1km range

Blette Stick Bluetooth LE offgrid communication

The Blette Stick is a Bluetooth 5.0 LE USB-C dongle designed to be attached to an Android smartphone in order to provide off-grid messaging and GPS coordinates sharing capabilities with a range of up to 1.1km in case WiFi and cellular networks are down. CNX Software readers may also be familiar with Meshtastic devices relying on WiFi to connect to the smartphone with Bluetooth and to other nodes using LoRaWAN to enable off-grid messaging while trekking or during emergencies. The Blettle Stick does something similar to the Meshtastic project but with Bluetooth LE long-range communication instead of Bluetooth+LoRaWAN. While the range will be shorter and limited to around 1km (line-of-sight), the plug-and-play design will make it easier to use for typical users who are not technically savvy. Blettle Stick specifications: SoC – Nordic Semi nRF52 Bluetooth 5.0 LE microcontroller (exact part number not specified, possibly nRF52840) Wireless – Bluetooth 5.0 […]

July 11, 2024September 2, 2024 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

LILYGO T3S3 E-Paper combines ESP32-S3 WiFi & BLE SoC with LoRa module, 2.13-inch e-Paper display

LILYGO T3S3 E-Paper is an ESP32-S3 WiFi and Bluetooth LE development board with a 2.13-inch e-Paper display and an SX1262 LoRa module that should make it suitable for off-grid messsaging even under sunlight. LILYGO has made some ESP32-S3 boards with an e-Paper display and some ESP32-S3 boards with a LoRa module, but unless I’m mistaken, the T3S3 E-Paper is the first board from LILYGO that combines ESP32-S3 SoC with e-Paper display and a LoRa module. It builds upon the earlier LILYGO T3S3 board with a 0.96-inch OLED. LILYGO T3S3 E-Paper specifications: ESP32-S3-WROOM-1U wireless module SoC – ESP32-S3FH4R2 dual-core Tensilica LX7 microcontroller @ up to 240 MHz with 2.4 GHz 802.11n WiFi 4 and Bluetooth 5.0 LE connectivity Memory – 2MB PSRAM Storage – 4MB SPI flash IPEX antenna connector Storage – MicroSD card slot Display – 2.13-inch e-Paper display (DEPG0213BN) with 250×122 resolution; size: 48.55 x 23.70mm Wireless 2.4 GHz […]

July 8, 2024 by Debashis Das - 1 Comment

Renesas SLG7EVBFORGE FPGA dev board is built around ForgeFPGA SLG47910V low-density FPGA

Renesas SLG7EVBFORGE 1K LUT ForgeFPGA Evaluation Board

Renesas SLG7EVBFORGE FPGA dev board, built around SLG47910V is Renesas’ first low-density FPGA in the ForgeFPGA family. The FPGA includes 1120 LUTs, 1120 flip-flops, 5kb of distributed memory, 32kb of block RAM, and a 50 MHz on-chip oscillator with a phase-locked loop (PLL). With robust features, low power consumption, and affordable pricing this FPGA can be used in applications in sensor data aggregation, consumer electronics, and portable computing devices. The SLG47910V FPGA gets connected to a ZIF socket to the development board, this design choice puts out a clear sign that upcoming Forge family FPGAs will support this dev board. Additionally, it features Pmod connectors and configurable power sources. The dev board can be programmed via OTP Non-Volatile Memory or SPI interface and additional features get managed through Renesas’ Go Configure Software Hub. Previously we have written about similar low-power low-cost FPGA boards like the Sipeed Tang Mega 138K, the […]