The GY-BMP280 is an atmospheric pressure sensor module. It allows measurement in the range of 300 ... 1100 hPa with an accuracy of 1 hPa. The sensor uses I2C or SPI bus

MQ-135 Gas Sensor

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 A range with galvanic isolation. It features a high-sensitivity analog VOUT output with a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and its low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5451

This module allows for simultaneous distance measurement up to 300 mm and illuminance measurement from 0.004 to 16,768 lux. Based on the Vishay VCNL4030 sensor, the system communicates with a microcontroller via I2C and works with 3.3V and 5V logic, making it compatible with platforms such as Arduino and Raspberry Pi. The board is equipped with STEMMA QT and Qwiic connectors for quick, solderless connection. Adafruit 6491

Module with pressure and temperature sensor BMP280. It allows to read the atmospheric pressure in the range from 300 to 1100 hPa and communicates via the I2C interface. Pimoroni PIM411

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 A range with galvanic isolation. It features an analog VOUT output with a sensitivity of 66.7 mV/A and a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and the low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5443

Vibration sensor with analog output. It is able to detect a wide range of vibrations. It can also be used for impact detection. 801S

Module with digital barometer BMP388. It measures pressure in the range from 300 to 1250 hPa and communicates via I2C or SPI. Adafruit 3966

Module with a 10-channel AS7341 sensor that detects light in various wavelength ranges (color detection). It communicates via the I2C interface. Adafruit 4698

PM2.5 dust sensor powered by 5V, communication via the UART interface. Sharp GP2Y1051AU0F

Module with a 3-axis magnetic field sensor LIS3MDL. Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 4479

A module with a high precision temperature sensor based on the MCP9808 chip. It communicates via the I2C interface. Adafruit 1782

Non-contact liquid level sensor with Gravity interface. It allows you to detect the level of liquid in non-metallic containers. DFRobot SEN0485

Module with the LIS3DHTR 3-axis accelerometer. The board is equipped with a Grove connector and communicates via the I2C interface. Seeed Studio 114020121

Crowtail – 3-Axis Digital Gyro is a gyroscope module with the ITG-3200 chip, offering precise rotational-motion measurement on three axes. Intended for interactive projects, robotics, control systems, and motion-responsive devices.

ACS711EX Current Sensor Carrier -31A to +31A

Crowtail – Current Sensor 2.0 enables AC/DC current measurement up to ±20 A using the ACS712 chip and generates an analog signal for further analysis. Used in energy-consumption monitoring systems, automation, and laboratory measurements.

Non-invasive AC Current Sensor, 5A, YHDC, RoHS

Module with BME680 sensor to measure the concentration of volatile organic compounds, pressure, temperature and humidity. It communicates via the I2C interface. Pimoroni PIM357

Crowtail – HTU21D Humidity & Temperature Sensor 2.0 enables accurate temperature and humidity measurement using the digital I2C interface. It is suitable for environmental monitoring projects, automation systems, and weather stations.