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Untitled Artnet sACN LED Strip Pixel Controller 16 universe

May 27, 2026

LichtBit’s open-source ESP32 Art-Net/sACN NeoPixels controller can drive up to 2,720 RGB LEDs

Dutch hardware designer LichtBit has launched a fully open-source ESP32-based Art-Net/sACN NeoPixels LED strip controller designed for large-scale lighting installations and custom stage design. Built around an ESP32, the hardware routes lighting data over wired Ethernet or Wi-Fi to manage up to 16 universes of addressable LEDs across 4 dedicated outputs. We have previously written about various NeoPixel LED controllers, such as the xcrhom WLED Type-C, the Adafruit Sparkle Motion Stick, the full-featured Adafruit Sparkle Motion, and others, which are designed for portable lighting setups and standalone animations. But LichtBit’s board targets the professional event industry by bridging the gap between commercial live-performance software (such as Resolume Arena, MadMapper, or xLights) and low-cost digital LED strips. LichtBit’s Art-Net and sACN LED controller specifications: Development Board – Generic ESP32 based developmt board with ESP32-WROOM-32 MCU Display – 128×32 I2C OLED display for real-time device configurations, status, and IP mapping Network 10/100Mbps Ethernet via WIZnet W5500 […]

Linux Kernel cpuidle subsystem architecture

April 20, 2026April 21, 2026

Idle CPU power management: cpuidle

Twenty years ago, it was easy for an operating system kernel to go idle: when there were no tasks to run, “the idle loop” would be scheduled. Early idle loops were basically empty infinite loops that did nothing while waiting for the next interrupt to happen. This saved power simply by avoiding running instructions that needed power-hungry components such as the cache or FPU! Over time, changing technology has allowed multiple additional hardware mechanisms to reduce power to be introduced. With these new options available today, the idle loop is responsible for choosing and deploying the “best” way to go idle. As a brief reminder, entering and returning from an idle state has a cost, and that cost can be measured both in time and in energy. Typically, the shallowest idle state is “nearly free” to enter/exit, whilst deeper idle states have increasingly higher costs to enter and exit. If […]

Pironman 5 Pro Max Review – A Raspberry Pi 5 Tower PC case with integrated video and audio capabilities, optional UPS kit

SunFounder has sent us a sample of the Pironman 5 Pro Max tower PC case for Raspberry Pi 5 for review alongside a PiPower 5 UPS board. The “Pro Max” builds upon the Pironman 5 Max we reviewed last year, but adds a 4.3-inch capacitive touchscreen display, a 5MP camera module, two speakers, a USB microphone, and a 3.5mm audio jack. The PiPower 5 is a UPS HAT designed for Raspberry Pi Zero/Model B single board computers, and not directly compatible with the Pironman cases, but we’ll still try to use it. I’ll start this review with an unboxing of the Pironman 5 Pro Max and PiPower 5 packages, followed by an assembly guide for the Pironman 5 Pro Max, a test of the new features (display, camera, audio interaction), and finally, I’ll have a quick test of the UPS HAT with the Raspberry Pi 5 enclosure. Unboxing of Pironman […]

April 13, 2026

Linux 7.0 Release – Main changes, Arm, RISC-V, and MIPS architectures

Linus Torvalds has just released Linux 7.0 on LKML: The last week of the release continued the same “lots of small fixes” trend, but it all really does seem pretty benign, so I’ve tagged the final 7.0 and pushed it out. I suspect it’s a lot of AI tool use that will keep finding corner cases for us for a while, so this may be the “new normal” at least for a while. Only time will tell. Anyway, this last week was a little bit of everything: networking (core and drivers), arch fixes, tooling and selftests, and various random fixes all over the place. Let’s keep testing, and obviously tomorrow the merge window for 7.1 opens. I already have four dozen pull requests pending – thank you to all the early people. Linus This follows the Linux 6.19 release about two months ago, which brought us PCIe link encryption and […]

March 18, 2026

Review of Open Nextion ESP32-S3-based HMI displays with the Arduino IDE and the ESP-IDF framework

ITEAD has sent us samples of the Open Nextion ONX3248G035 and ONX2432G028 ESP32-S3 HMI displays for review. Open Nextion is a new product line that differs from the original Nextion HMI family, which relies on the Nextion Editor for UI design and UART communication for control. Instead, the Open Nextion features an ESP32-S3 wireless microcontroller handling logic processing, display control, and wireless connectivity, all in one integrated package. ITEAD fully supports the ESP-IDF framework and the Arduino IDE with LVGL graphics library support. The ONX3248G035 model features a 3.5-inch screen, while the ONX2432G028 variant has a 2.8-inch screen. The Open Nextion HMI wireless displays also take accessories such as a dual-microphone array, a speaker, and an I/Os adapter. The new Open Nextion product line is especially well-suited to embedded developers/makers who want an all-in-one board with HMI and wireless capabilities, IoT terminal and Smart HMI panel prototyping, students interested in […]

January 12, 2026January 13, 2026

Upgraded Sipeed NanoKVM-USB USB KVM solution gains 4K 60 FPS video capture and HDMI loop output

Sipeed has released a new variant of its NanoKVM-USB low-cost USB KVM adapter, which upgrades 2K 30 FPS capture and 4Kp30 loop out to 4K 60 FPS capture and 4Kp60 HDMI loop output. The new NanoKVM-USB 4K keeps the same ports as the earlier model, with HDMI and USB-C inputs connected to the target, and another USB-C port that connects to the host, in order to remotely control the target with keyboard, mouse, and monitor emulation. A USB Type-A port that can switch between host and target modes is also implemented, for instance, to share a USB drive between the two systems. NanoKVM USB 4K specifications: Video Input/Output HDMI input up to 4Kp60 from target device HDMI loop output up to 4Kp60 for optional connection to a monitor USB USB Type-C port for connection to the target device for keyboard/mouse emulation USB 3.0 Type-C port for connection to the host […]

Seeed Studio reTerminal E1001 E002 ePaper Display review

December 15, 2025December 14, 2025

reTerminal E1001/E1002 Review – B&W and color ePaper displays tested with SenseCraft HMI and Home Assistant

Seeed Studio sent us samples of the reTerminal E1001 (monochrome) and E1002 (color) ePaper displays for review. They are powered by an ESP32-S3 microcontroller providing WiFi and Bluetooth LE wireless connectivity, and are designed for low-power information display applications, consuming power only when updating the screen content. This makes them ideal for tasks requiring long battery life (average of 3 months per charge, depending on how often they are updated) and always-on display capabilities. In this review, we will unbox the devices, go through a teardown, and test them with Seeed Studio’s SenseCraft no-code HMI platform, as well as ESPHome firmware for Home Assistant integration. reTerminal E1001/E1002 unboxing We received two cardboard packages that look identical and are labeled “Seeed Studio reTerminal ePaper Display”. But the sticker on the bottom side of the boxes provides clarity… Inside each box, we’ll find the ePaper display, a USB Type-C cable, a display […]

December 11, 2025

iWave Systems iG-RainboW-G69M TI AM62L OSM Size-S system-on-module powers Raspberry Pi-sized SBC

Yesterday, I wrote about the Beacon AM62L SoM, one of the first system-on-module based on Texas Instruments AM62L dual-core Cortex-A53 SoC for low-power IoT and HMI applications. It turns out there’s another AM62L module compliant with the OSM Size-S standard, along with a Raspberry Pi-sized carrier board. iWave Systems iG-RainboW-G69M is a 30x30mm CPU module with 1GB or 2GB LPDDR4, 8GB eMMC flash by default, and 332 LGA contacts exposing interfaces such as RGB LCD and MIPI CSI display interfaces, dual gigabit Ethernet, I2S audio, USB 2.0 interfaces, and a range of low-speed I/Os. iWave Systems iG-RainboW-G69M specifications: SoC – Texas Instruments AM62Lx CPU – Dual-core Arm Cortex-A53 processor up to 1.25GHz Cache – 32KB L1 D-cache, 32KB L1 I-cache per core; shared 256KB L2 cache System Memory – 1GB LPDDR4, expandable up to 2GB Storage 8GB eMMC flash (other capacities available upon request) 32Kbit EPPROM 332 LGA contacts Storage […]