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February 10, 2022

TTGO T-Block modular ESP32 devkit supports “Trolley” covers acting as display, buttons, sensor, proto area, etc…

When I first LilyGO TTGO T-Block ESP32 devkit with an enclosure and a display it reminded me of the M5Stack Core2 devkit, but it’s actually different as LilyGO designed a modular system that allows users to change the functionality of the top cover with expansion boards called “Trolleys”. That means TTGO T- Block can be fitted with a small e-Ink display, a prototyping cover, an RGB LED matrix, a small board that supports various MQ gas sensors, touch buttons, or a Trolley board equipped with headers compatible with common Arduino modules. TTGO T-Block Host 9102 preliminary specifications: WiSoC – ESP32 dual-core processor @ 240 MHz with 520KB SRAM, WiFi 4 and Bluetooth LE 4.2/5.x connectivity Memory – 8MB PSRAM Storage – 16MB SPI flash, MicroSD card slot USB – 1x USB Type-C for power and programming via CH2104 USB to TTL chip Trolley interface – 20-pin connector with 17x GPIO, […]

February 9, 2022February 9, 2022

Raspberry Pi 4 to support Network install to a blank MicroSD card

The Raspberry Pi 4 will soon be able to install Raspberry Pi OS without the need for external hardware to flash the image. Raspberry Pi Network install will allow users to install a blank MicroSD card into their board, which will trigger the launch of Raspberry Pi Imager on the Raspberry Pi, and flash the image downloaded from the Raspberry Pi website. So far in order to install Raspberry Pi OS, you had to download Raspberry Pi Imager on a computer or a working Raspberry Pi, insert the MicroSD card into the host, and flash the image, before moving the MicroSD card into the Raspberry Pi board. This works just fine for most people, but if the Raspberry Pi is your only computing device, as may be the case in developing countries, that does not work. Network Installs may also speed up the installation process in the classroom where multiple […]

Graperain Samsung, Rockchip RK3588, and Qualcomm CPU modules, SBCs, and carrier boards

February 7, 2022

Add four PCIe x1 slots to Raspberry Pi CM4 IO with Waveshare PCIe-Packet-Switch-4P board

The 1-lane PCIe Gen 2 interface in Broadcom BCM2711 processor is exposed in Raspberry Pi CM4, and most carrier boards are exploiting the interface including the official Raspberry Pi Compute Module IO carrier board. But if you ever wanted to connect multiple PCIe cards to the CM4 IO board, Waveshare has got you covered with the PCIe-Packet-Switch-4P that provides four PCIe x1 slots through an ASMedia ASM1184e PCIe switch. PCIe-Packet-Switch-4P expansion board specifications: Compatible with Raspberry Pi Compute module 4 IO board 4x PCIe Gen 2 x1 expansion slots, compatible with PCIe Gen 1 x1 ASM1184e PCIe switch taking 1x PCIe x1 Gen2 upstream port to 4x PCIe x1 Gen2 downstream ports; no driver required, plug and play Power Supply 12V via PCIe interface or 12V via DC jack (or even 5V see warnings below) Dimensions – 82 x 39 mm There are some interesting warnings in the Chinese […]

February 4, 2022July 14, 2022

Amlogic S905C2 quad-core Cortex-A55 processor supports digital TV tuners, CAS

Amlogic S905C2 quad-core Cortex-A55 processor has been showing up in some Android 11 set-top boxes (with tuner), and a development kit, but with limited public information. The specifications appear to be similar to the ones for Amlogic S905X4 processor plus additional support for DVB tuners and conditional access (CAS) with the latter confirmed by an independent source saying the Amlogic S905C2 processor is part of the Android 11 SDK with a reference board named “ohmcas”. Amlogic S905C2 preliminary specifications: CPU – Quad-core Cortex-A55 up to 2.0 GHz GPU – Arm Mali-G31MP2 with support for OpenGL ES 3.2, Vulkan 1.0/1.1, and OpenCL 2.0 Memory I/F – Up to 4GB DDR3-2133, DDR3L-2133, DDR4-3200, LPDDR3-2133, LPDDR4-3200 SDRAM Storage I/F – eMMC 5.0, NAND Flash, SPI NOR/NAND, SD Video Output – HDMI 2.1 up to 4Kp60, HDCP2.3, CVBS Video Decoding – AV1 up to 4Kp120, 10-bit H.265, VP9, AVS2 up to 4Kp75, H.264 4Kp30 […]

February 3, 2022February 3, 2022

More Allwinner F1C200s ARM9 boards: MangoPi R3 and CherryPi-F1C200S

I wrote about the Widora TINY200 board based on Allwinner F1C200s ARM9 processor with 64MB built-in RAM, up to 512MB NAND flash, LCD and camera interfaces in April 2020. I was just informed more similar Allwinner F1C200s boards had recently shown up with Widora MangoPi R3 that’s basically the same as TINY200, and CherryPi-F1C200S with similar dimensions and features, but a different ports arrangement. Let’s have a look at both. MangoPi R3 MangoPi R3 specifications are the same as the ones for Tiny200 board, but they selected the 128MB NAND flash storage option, and changed the USB-TTL chip: SoC – Allwinner F1C200s ARM926EJS processor @ 420 MHz (overclockable to 700 MHz) with 64MB DDR RAM Storage – 128MB NAND flash and MicroSD card slot Display I/F – 40-pin RGB565 display interface and 6-wire touch interface Camera I/F – 24-pin DVP camera interface compatible with OV2640, GC0328, etc. Audio – Onboard […]

February 2, 2022March 7, 2024

Golioth IoT development platform offers Zephyr SDK, support for nRF9160, ESP32, and over 100 other platforms

There are already plenty of IoT development platforms, but here’s another one with Golioth that relies on a Zephyr SDK, “first-tier” support for Nordic Semiconductor nRF9160 (cellular) and Espressif Systems ESP32-C3 (WiFi), as well as a QEMU-based simulator for easy testing. The use of an open-source Zephyr SDK even enables them to support over 100+ hardware components, and the company, also called Golioth, says their platform scales from one device for evaluation to one million devices during deployment, thanks notably to a free Dev Tier account to get started at no cost. Some of the other highlights of Golioth include: “Secure by Default” communication over efficient protocols like CoAP and soon MQTT Access to Device Services like Software updates that include secure boot and firmware management Real-time NoSQL database (LightDB) that can be useful for creating Digital Twins and synchronization Time-series database (LightDB Stream) for storing and querying sensor data […]

Rockchip RK3568, RK3588 and Intel x86 SBCs and SoMs in 2025

January 30, 2022

Wappsto:bit GO – An ESP32 board with plenty of sensors, Micro:bit compatibility (Crowdfunding)

Wappsto:bit GO is an ESP32 board compatible with BBC Micro:bit accessories thanks to a compatible edge connector, but adding WiFi to Bluetooth LE, and offering some extras compared to Elecrow Mbits ESP32-based BBC Micro:bit clone. The new board is notably equipped with a wider range of sensors including a light sensor, a magnetometer, and sound sensor beside the temperature sensor and accelerometer present in the original board, and it also exposes GPIO through a more traditional 2.54-pitch header to facilitate the integration of a wider variety of add-on boards. Wappsto:bit GO specifications: Wireless modules ESP32-WROOM-32E module with ESP32 dual-core microcontroller, 4MB flash, 2.4 GHz WiFi and Bluetooth LE connectivity, built-in PCB antenna Raytac MDBT50Q-512K Bluetooth 5.2 module based on nRF52833 with 512KB Flash MCU – NXP Kinetis KL2 Arm Cortex-M0+ microcontroller (MKL27Z256VFM4 ) with 256KB Flash (for USB port handling) Display – 25 LED matrix Sensors Temperature sensor, Light sensor […]

January 28, 2022January 28, 2022

Speeding up open-source GPU driver development with unit tests, drm-shim, and code reuse

Getting an Arm platform that works with mainline Linux may take several years as the work is often done by third parties, and the silicon vendor has its own Linux tree. That means in many cases, the software is ready when the platform is obsolete or soon will be. It would be nice to start software development before the hardware is ready. It may seem like a crazy idea, but that’s what the team at Collabora has done to add support for Arm “Valhall” GPUs (Mali-G57, Mali-G78) to the Panfrost open-source GPU driver. The result is that it only took the team a few days to successfully pass tests using data structures prepared by their Mesa driver and shaders compiled by their Valhall compiler after receiving the actual hardware thanks to the work done in the last six months. So how did they achieve this feat exactly? We have to […]