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August 8, 2025 by Jean-Luc Aufranc (CNXSoft) - No Comments

Murata IRS-0D200ST00R1 tiny, low-profile SMD PIR motion sensor measures just 6 x 6 x 2.6 mm

Murata SMD TYPE IRS-D200ST00R1 is one of the world’s smallest PIR motion sensors at just 6 x 6 mm in size and with a 2.6 mm thickness. Its name implies, it’s a reflowable SMD component, which contributes to cutting manufacturing costs. The pyroelectric infrared sensor interfaces to a host microcontroller through I2C and an interrupt pin. It enables wake-up and/or human detection in IP cameras, doorbells, thermostats, smart lighting systems, and various IoT devices. Murata SMD TYPE IRS-D200ST00R1 specifications: 2x electrodes (2.0×0.5mm each) Responsivity – 19.5 mV0p typ. Field of View – X-axis=55°/Y-axis=42° Range – Depends on lens. Typically, 10 to 15 meters for an outdoor camera 8x solder pads Host interface – I2C Interrupt pin 2x TEST pins VDD, VSS (GND) pins Misc – “High signal-to-noise ratio, strong noise resistance” Supply Voltage – 1.8V to 3.3V Current Consumption – 8μA (@ 3.3V?) Dimensions – 6.0 x 6.0 x 2.6mm […]

August 5, 2025 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

ESP32 Bus Pirate open-source firmware works on off-the-shelf hardware

ESP32 Bus Pirate is an open-source firmware inspired by the original Bus Pirate from Dangerous Prototypes, which turns off-the-shelf (ESP32-S3) hardware into a multi-protocol hacker’s tool. It supports sniffing, sending, scripting, and interacting with various digital protocols (I2C, UART, 1-Wire, SPI, etc.) via a serial terminal or web-based CLI. It’s been tested on Espressif ESP32-S3-DevKitC-1 development board, M5Stack Cardputer, M5StickC Plus2, Atom S3 Lite, M5Stamp S3, and LILYGO T-Embed (CC1101) boards. ESP32 Bus Pirate firmware highlights: Interactive CLI via USB serial – For faster performance and high responsiveness Web interface (over WiFi) – No cable needed to the host, works from any web browser Supported Modes HiZ (default) – High-Z is a safe mode where all outputs are disabled and all power supplies are turned off I2C (scan, glitch, slave mode, dump) SPI (flash, SD card, slave mode) UART / Half-Duplex UART (bridge, read, write) 1-WIRE (ibutton, temp sensor) 2-WIRE […]

July 8, 2025July 8, 2025 by Debashis Das - 3 Comments

Kappa4310Rasp – A Modbus RTU HAT for Raspberry Pi based on IS4310 Slave stack chip

The Kappa4310Rasp is a Raspberry Pi-compatible Modbus RTU HAT designed to evaluate the IS4310 Modbus RTU Slave stack chip. This allows engineers to simulate sensor and actuator interactions using a push-button and RGB LED without requiring a custom board or soldering. The board features an RS-485 interface with two RJ45 connectors for daisy-chaining Modbus networks. The board communicates with the Raspberry Pi over I²C and supports 500 Holding Registers along with Function Codes 3 (Read Holding Registers), 6 (Write Single Register), and 16 (Write Multiple Registers). The HAT operates at 3.3V and includes jumpers to enable or disable onboard I²C pull-ups. Additional features include dedicated Tx/Rx indicator LEDs, a power LED, GPIO-connected RGB LEDs, and a push-button for real-time interaction. Kappa4310Rasp board specifications: Modbus RTU stack chip – IS4310 (I²C interface, 500 Holding Registers) Protocol support – Function Codes 0x03 (Read), 0x06 (Write Single), 0x10 (Write Multiple) Communication – RS485 […]

February 10, 2025February 9, 2025 by Debashis Das - No Comments

STMicro’s STEVAL-MKI109D evaluation board supports all ST MEMS sensors with a DIL24 socket

STEVAL MKI109D MEMS sensor evaluation board

STMicroelectronics has introduced the STEVAL-MKI109D a MEMS sensor evaluation board, designed to test and optimize STMicro’s MEMS sensors for various applications, including industrial automation, smart agriculture, and consumer electronics. Built around the STM32H563ZI Arm Cortex-M33 MCU this development board features I²C, I3C, and SPI interfaces, along with a TDM interface for high-speed sensor data communication. The board is also compatible with STMicro MEMS DIL24 adapter boards, which makes it easy for engineers to test different sensors. Additionally, it has software-adjustable power circuitry (0–3.6V), and onboard power monitoring for accurate analysis of sensor performance. STEVAL-MKI109D specifications Main MCU – STMicro STM32H563ZI Arm Cortex-M33 MCU with DSP and FPU Storage – MicroSD card slot Sensors – Supports all STMicro MEMS DIL24 compatible adapter boards Interfaces – I²C, I3C, SPI, TDM USB – USB Type-C connector for power and programming Misc Onboard J6 connector for STM32 programming and debugging Onboard J9 connector for […]

January 6, 2025January 6, 2025 by Debashis Das - 8 Comments

PiSugar3 is a low-cost Raspberry Pi UPS module with RTC, hardware battery protection, and power management features

PiSugar Kitchen’s PiSugar3 is a compact Raspberry Pi UPS module with integrated power management features that make Raspberry Pi Zero boards portable. This new module is an upgraded version of the PiSugar S and PiSugar S Pro, which we previously wrote about. The PiSugar S features a compact 1,200mAh battery for Raspberry Pi Zero, and the PiSugar S Pro comes with a 5,000mAh battery for Raspberry Pi 3/4. The PiSugar3 adds new features to these models with upgrades including an RTC, and a fully functional UPS functionality with customizable wake-up options. It also includes an anti-mistaken touch switch to avoid accidental shutdowns, a software watchdog, and hardware battery protection to extend battery longevity. The UPS module gets attached to the bottom of the Pi and there are pogo pins on the UPS module that deliver the power while the GPIO pins of the Pi remain free for other tasks, on top […]

October 30, 2024October 30, 2024 by Sayantan Nandy - No Comments

$5 CH32-Ant CH32V003 RISC-V development board comes with Stemma QT connector

The CH32-Ant is a low-cost, breadboard-compatible development board powered by the WCH Electronics CH32V003-F4U6 RISC-V microcontroller, ideal for prototyping. It is pin-compatible with Prokyber’s ESP32-C6-Bug, offering an easy transition for users who don’t need wireless capabilities or the higher performance of the ESP32-C6FH4. The board features a Stemma QT connector for straightforward I2C sensor integration and a USB Type-C port that supports data transfer and power through software-based USB on the CH32V003. The CH32-Ant offers configurable logic voltage at 3.3V or 5V, adjusted via an onboard 0-ohm resistor, providing flexibility for sensor projects. Powered by the CH32V003F4U6 microcontroller, it operates up to 48MHz with 2kB of RAM and 16kB of flash, making it cost-effective for applications requiring basic processing without wireless. The CH32-Ant features a compact layout designed for breadboard compatibility, a Stemma QT connector for an I2C module on one end of the board, and a USB Type-C connector […]

August 16, 2024August 19, 2024 by Sayantan Nandy - 2 Comments

Bus Pirate 5XL and 6 hardware debugging tools utilize Raspberry Pi RP2350A and RP2350B microcontrollers

The Bus Pirate 5XL and 6 are open-source hardware debugging tools respectively based on Raspberry Pi RP2350A and RP2350B and designed to simplify interaction with various bus protocols like 1-Wire, I2C, SPI, UART, several LEDs, and more. The idea is to send commands to a chip or sensor and get the response, without writing a single line of code making it ideal for hardware hacking and tinkering. The devices feature buffered I/O pins with voltage and current measurement, a programmable power supply with current limiting, an RGB LCD for pin status and info, and an auxiliary header for connecting logic analyzers. All these features make this device useful for applications like debugging circuits, prototyping projects, and reverse engineering devices. The new devices are updates to the Bus Pirate 5 based on Raspberry Pi RP2040 MCU. You’ll find Bus Pirate specifications for the three models in the table below. The original […]

July 22, 2024July 22, 2024 by Debashis Das - 7 Comments

4.3-inch ESP32-S3 wireless touchscreen display features terminal block with RS485, CAN Bus, I2C, DIO

ESP32-S3 display RS485 CAN Bus terminal block

Waveshare “ESP32-S3-Touch-LCD-4.3B” is a capacitive touch display development board built around an ESP32-S3 SoC with RS485, CAN Bus, I2C, and isolated DIO interfaces provided through a terminal block. The devkit features a 4.3-inch capacitive touch display that has an 800×480 resolution, RTC, and a microSD card slot. Combined with a wide input voltage range of 7-36V DC, the ESP32-S3-Touch-LCD-4.3V is suitable for IoT HMI, smart home automation, and more. Previously we have written about similar development boards from Waveshare like the ESP32-S3 1.69-inch touch display, the $15 Waveshare 1.69-inch IPS touch LCD module, the Waveshare RP2040-LCD-0.99-B rounded display but they would offer no expansion pins or GPIO through pads or 4-pin connectors, while the ESP32-S3 display features a terminal block with additional interfaces like RS485 pr CAN Bus that should make wiring more convenient and versatile for the target applications. Waveshare ESP32-S3 touch LCD specifications: Wireless MCU – Espressif Systems ESP32-S3R8 […]