Ultrasonic distance sensor (sonar) with a measuring range from 50 cm to 5 m. It allows you to read data via an industrial analog interface with a current output of 4-20 mA. DFRobot SEN0266

RGB Pixels are digitally-controllable lights you can set to any color, or animate. Adafruit 322

The BST-12095-DC-FT buzzer is an active sound transducer with a 12 mm diameter, powered by a 5 V DC supply. It generates a continuous sound signal without the need for an external driving signal, making it ideal for use in alarm and signaling systems.

Indoor air quality measurement module, combining two high-end Sensirion sensors – SCD41 and SEN55. It offers a comprehensive set of measurements, including CO2 concentration, volatile organic compounds (VOC), suspended dust (PM1.0, PM2.5, PM4, PM10), as well as temperature and relative humidity. SparkFun SEN-25200

Ultrasonic distance sensor (sonar) with a measuring range from 15 to 318 cm with the possibility of detecting objects in a selected zone. It allows you to read data via the USB interface. DFRobot SEN0279

The survey grade magnetic GNSS/GPS antenna mount is a rugged solution that allows for quick and stable mounting to metal surfaces without the need for drilling. Equipped with a standard 5/8" 11-TPI thread and designed to protect the TNC cable, it provides durability and convenience for stationary surveying applications. SparkFun PRT-21257

Ultrasonic distance sensor (sonar) with a measuring range from 50 cm to 5 m. It allows you to read data through one of three interfaces: variable width pulse, analog output or UART TTL interface. DFRobot SEN0278

A compact Meshtastic compatible device that combines LR1110, nRF52840 and Mediatek AG3335 GPS technologies for precise positioning and low power consumption. With IP65 waterproof, Bluetooth 5.0, Thread and Zigbee support and magnetic charging, it is ideal for outdoor activities and emergencies. Seeed Studio 114993369

LoRa module based on Semtech SX1262 chip, supporting 868/915 MHz band and providing stable operation thanks to the use of TCXO. It is characterized by transmit power up to 22 dBm, receiver sensitivity -136.73 dBm and low power consumption, which makes it ideal for battery-powered IoT devices. Seeed Studio 114993390

The UGO 5.1 sound card provides easy and convenient expansion of your computer\'s audio functions, offering high-quality surround sound and compatibility with various operating systems. UGo UKD-1085

8-channel module with relays designed for minicomputers Raspberry Pi. It allows you to control devices powered by high voltage. Waveshare RPi Relay Board (B)

Graphic LCD 128x64 with 20-pin connector and LED backlight (green). SparkFun LCD-00710

Universal weather station for measuring wind speed and direction, temperature, humidity and atmospheric pressure, compatible with micro:bit, Raspberry Pi, ESP32 and Unihiker controllers. It has 16 MB of internal memory, which allows for 160 days of data storage at a minute sampling rate, and data can be exported via USB Type-C port. The sturdy metal casing with a waterproof protective coating and compatibility with tripods make the station ideal for field atmospheric research and educational projects. DFRobot EDU0157-EN

The Amass XT30-F (2+2) connector is a compact, rugged female socket that provides a secure connection in high-current applications such as drones and power systems. With gold-plated contacts and high temperature resistance, it offers low electrical resistance and long life in harsh operating conditions.

Industrial relay module controlled via RS485 interface with Modbus RTU protocol support, offering 8 outputs with maximum load of 10 A. Equipped with galvanic isolation, opto-isolation, TVS diodes and DIN mounting, it ensures safe and reliable operation in harsh industrial conditions. Thanks to functions such as flash-on/off, configurable RS485 address (1-255), signaling diodes and wide power supply range (7-36 V), the module is perfect for building automation and device control. Waveshare Modbus RTU Relay (B)

USR-G806s-G is an industrial 4G LTE router that provides stable data transmission in harsh industrial environments and supports 4G, 3G and 2G standards. With 10/100 Mbps Ethernet ports and support for TCP/IP, UDP, DHCP protocols as well as VPN and firewall functions, the router is perfect for monitoring, automation and IoT systems.