CNX Software - Embedded Systems News

September 29, 2021September 28, 2021 by Jean-Luc Aufranc (CNXSoft) - 9 Comments

Heatshrink – An ultra-lightweight compression library for embedded systems

When I wrote about Bangle.js 2 JavaScript smartwatch yesterday, I noticed they used “Heatshrink compression” in ESPruino firmware. I can’t remember ever reading about Heatshrink before, and indeed there are no results while searching on CNX Software. Heatshrink is an open-source data compression library designed for resources-constrained embedded systems that works with as little as 50 bytes of RAM. That’s impressive, so let’s investigate. The library is written in C language and was released about 8 years ago on Github with the following key features: Low memory usage – As low as 50 bytes with specific parameters, and usually under 300 bytes are needed. Incremental, bounded CPU use – Input data is processed in tiny bites Static or dynamic memory allocation Released under an ISC license which allows you to use the library freely, even in commercial products. The internal workings of the library are explained as follows: Heatshrink is […]

September 28, 2021December 22, 2021 by Jean-Luc Aufranc (CNXSoft) - No Comments

Data acquisition SBC offers PCIe/104 and mPCIe expansions

DIamond Systems’ Saturn is a rugged Intel Atom x5-E3940 powered SBC with an industrial analog and digital data acquisition subsystem, as well as PCIe/104 OneBank and mini PCIe sockets for I/O expansion. The Saturn SBC is also equipped with either 4GB non-ECC or 8GB ECC RAM, SATA, two Gigabit Ethernet networking interfaces, two HDMI video outputs, multiple USB and serial interfaces, and more… most available through positive latching connectors that comply with the PCIe/104 standard, which also allows for stacking multiple expansion boards through the PCIe/104 Onebank connectors. Saturn SBC specifications: SoC – Intel Atom x5-E3940 quad-core Apollo Lake processor @ up to 1.6GHz / 1.8 GHz (burst with 15-year lifecycle System Memory – 4GB non-ECC or 8GB ECC RAM soldered Storage – SATA port and M.2 2242 SATA socket up to 1TB Video Output – 2x HDMI interfaces, LVDS Audio – ALC622 audio codec; Line Out, Line In, and […]

ArmSoM CM5 - Raspberry Pi CM4 alternative with Rockchip RK3576 SoC

September 28, 2021September 28, 2021 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

BMAX B1 PLUS Celeron N3350 Mini PC with 6GB RAM, 64GB eMMC flash sells for $105 (Promo)

We’ve been seeing some deep discounts for systems based on older Intel processors recently, and the $105 BMAX B1 Plus mini PC joins other systems such as a $100 Gemini Lake laptop or an Atom x5-Z8350 mini PC going for under $90 shipped. So what do you get for that price? An Intel Celeron N3350 dual-core Apollo Lake mini PC with 6GB RAM, 64GB eMMC flash, as well as an M.2 SSD slot, Gigabit Ethernet and WiFi 5, HDMI and VGA video output, and four USB ports. BMAX B1 PLUS specifications: SiC – Intel Celeron N3350 dual-core Apollo Lake processor @ 1.1 GHz / 2.4 GHz (Turbo) with Intel HD Graphics 500; 6W TDP System Memory – 6GB LPDDR4 Storage – 64GB eMMC flash, M.2 M-Key 2280 slot for SATA SSD, MicroSD card slot Video Output – HDMI 2.0 up to 4Kp60, VGA Audio – 3.5mm stereo audio jack, digital […]

September 28, 2021 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

Bangle.js 2 JavaScript smartwatch gets an nRF52840 MCU, a new design (Crowdfunding)

The Bangle.js 2 is an upgraded, improved version of the Bangle.js hackable, JavaScript smartwatch based on NordicSemi nRF52832 SoC that was introduced in 2019 with ESPruino open-source firmware. The new watch comes with a new rectangular design, a Nordic Semi nRF52840 SoC that offers four times the RAM, twice the on-chip and external flash, plus an always-on sunlight-readable screen with full touchscreen support, and improved Bluetooth signal strength. Bangle.js 2 specifications: MCU – Nordic Semi nRF52840 Arm Cortex-M4 MCU @ 64MHz with Bluetooth LE, 256kB RAM, 1MB on-chip flash Storage – 8MB flash Display – 1.3-inch 176×176 always-on 3-bit color LCD display (LPM013M126) with backlight, full touchscreen Connectivity Bluetooth 5.0 LE with advertising, central and peripheral mode support GPS/Glonass receiver Sensors Heart rate monitor 3-axis accelerometer, 3-axis magnetometer Air pressure/temperature sensor Misc – Vibration motor Debugging/Programming – Full SWD debug port on the rear of the watch Battery – 200mAh […]

September 27, 2021November 15, 2022 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

ZB-GW03 ESP32-based Ethernet Zigbee gateway works with Tasmota firmware

ZB-GW03 is an Ethernet Zigbee Gateway compatible with eWelink mobile app and with a design similar to SONOFF ZBBridge gateway but replacing ESP8266 SoC by ESP32 SoC, and adding an Ethernet port. The ZB-GW03 gateway is apparently based on the same Silicon Labs EFR32MG21 Zigbee Arm Cortex-M33 chip and has been hacked to run Tasmota open-source software for people preferring more flexibility and/or integration with OpenHAB or Home Assistant open-source home automation frameworks via Zigbee2MQTT. ZB-GW03 gateway specifications: Main MCU – Espressif Systems ESP32 dual-core Tensilica TX6 processor @ 240 MHz with WiFi 4 and Bluetooth connectivity Zigbee MCU – Silicon Labs EFR32MG21 Arm Cortex-M33 MCU @ 80 MHz with Zigbee 3.0 connectivity Connectivity 10/100M Ethernet, WiFi, and Bluetooth via ESP32 Zigbee 3.0 via Silabs MG21 MCU with support for 128 nodes, up to 200+ meter range One 2.4 GHz Zigbee antenna One 2.4 GHz PCB antenna for WiFi Misc […]

September 27, 2021September 27, 2021 by Jean-Luc Aufranc (CNXSoft) - No Comments

ANAVI Gardening uHAT adds soil and other sensors to Raspberry Pi (Crowdfunding)

We’ve been covering and reviewing ANAVI open-source hardware boards for several years now, either standalone boards based on ESP8266, or add-on boards for Raspberry Pi. The ANAVI Gardening uHAT is the latest board from Leon Anavi. It is a micro HAT designed for Raspberry Pi Zero to Raspberry Pi 4 SBCs that offers interfaces for soil sensors and other environmental sensors allowing measurements of soil moisture, atmospheric pressure and humidity, temperature with a waterproof sensor, and light intensity for gardening applications. ANAVI Gardening uHAT key features and specifications: Compatibility – Any Raspberry Pi board with a 40-pin GPIO header Storage – EEPROM for uHAT compliance 2x 3-pin headers for capacitive soil moisture sensors connected to Microchip MCP3002 ADC chip 3-pin One-wire terminal block for a waterproof temperature sensor 2x 4-pin I²C headers for additional sensors 10-header with GPIO pins for controlling irrigation systems and peripherals Misc – 2x user LEDs, […]

Rockchip RK3568/RK3588 and Intel x86 SBCs

September 27, 2021 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Geniatech GTW410 – An ultra compact IoT gateway based on Snapdragon 410E SoC

After writing about Azulle Ally Snapdragon 450 mini PC, I was reminded there are other small form factor Snapdragon devices such as Geniatech GTW410 based on the earlier Snapdragon 410E quad-core processor. While the GTW410 is marketed as an “Embedded IoT Gateway”, it could also serve as an entry-level industrial mini PC with up to 2GB RAM, 16GB eMMC flash, as well as HDMI, Ethernet, and USB ports. Geniatech GTW410 specifications: SoC – Qualcomm Snapdragon 410E (APQ8016) quad-core ARM Cortex A53 processor @ 1.2 GHz with Adreno 306 GPU System Memory – 1 or 2 GB LPDDR3 @ 533MHz Storage – 8 or 16 GB eMMC 5.0 flash + micro SD 3.0 (UHS-I) slot Video Output – HDMI 1.3 up to 1080p @ 30 Hz Connectivity – 10/100M Ethernet, Integrated 802.11 b/g/n, Bluetooth 4.1, GPS with on-board antenna, optional Zigbee USB – 2x USB 2.0 host ports, 1x micro USB […]

September 26, 2021 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Raspberry Pi smart audio devkit features AISonic IA8201 DSP, microphone array

Knowles AISonic IA8201 Raspberry Pi development kit is designed to bring voice, audio edge processing, and machine learning (ML) listening capabilities to various systems, and can be used to evaluate the company’s AISonic IA8201 DSP that was introduced about two years ago. The kit is comprised of three boards with an adapter board with three buttons connecting to the Raspberry Pi, as well as the AISonic IA8210 DSP board itself connected via a flat cable to a microphone array. Knowles AISonic Raspberry Pi development kit Knowles did not provide the full details for the development but says it enables wake-on-voice processing for low latency voice UI, noise reduction, context awareness, and accelerated machine learning inferencing for edge processing of sensor inputs. Some of the use cases include Low Power Voice Wake to listen for specific OEM keywords to wake the host processor, Proximity Detection when combined with an ultrasonic capable […]