Module with an ambient oxygen concentration sensor. The system allows you to measure the oxygen volume in the range up to 25% with a resolution of 0.15%. The module communicates via the I2C interface. DFRobot SEN0322

Professional pH measurement set with an industrial silver chloride electrode (Ag/AgCl), the measurement in the range from 0 to 14 pH is converted into voltage with a linear characteristic. DFRobot SEN0169-V2

5" TFT LCD display with touch screen. It was equipped with DSI interface for image display and I2C interface for touch screen. Resolution 800x480 pixels. DFRobot DFR0550

The camera module with the Sony IMX219 sensor works with all versions of the Raspberry Pi. The camera is equipped with a matrix with a resolution of 8 MPx. ArduCAM B0152

Module with 6 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4206

Module with 6 QTR type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4106

Module with 5 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4445

Module with 6 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4446

Module with 8 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4448

Module with 5 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4245

E-Ink display module (ePaper) with a diagonal of 2.9 "and a resolution of 296 x 128 pixels with a SPI controller. Waveshare 13339

Module with ozone detection sensor. It performs measurements up to 10 ppm with a resolution of 0.01 ppm. It has a UART output and an analog output. ZE25-O3

Soil moisture sensor with analog output. The module comes with a probe with metal tips.

Module with e-Paper display, 5.83" diagonal and 648x480 px resolution. Communication via SPI interface. Waveshare 5.83inch e-Paper HAT (B)

Shield designed for IoT applications with LTE CAT M1/NB-IoT SARA-R4 modem. The board is compatible with Arduino, allows you to add communication via cellular networks to Arduino boards. SparkFun CEL-14997

Small size driver module TB67S279FTG stepper motor powered with 10 ... 47V voltage and working current 1.1A. The controller allows you to control the motor movement up to 7 different resolutions (up to 1/32 of a step). Polol 3098

Small size driver module TB67S249FTG stepper motor powered with 10 ... 47V voltage and working current of 1.6A. The controller allows you to control the motor movement up to 7 different resolutions (up to 1/32 of a step). Polol 3096

Flow sensor with thread G3/4. Dedicated to liquids of high concentration and low viscosity. DFRobot SEN0551