STEMMA QT PCF8574 I2C GPIO Expander - module with GPIO expander

4-channel PCIe port expander. It can be powered with 12 V via a PCIe connector or an external DC connector. Waveshare PCIe-Packet-Switch-4P

16-channel IO expander with 7 analog inputs with 10-bit resolution. Communicates via USB interface. It has compact dimensions, making it suitable for small devices. Version with connector at the top. Numato Lab GP160002

8-channel I2C expander module based on the TCA9548A system. The module has Qwiic connectors and allows communication with many I2C devices that have the same address. Sparkfun BOB-16784

Module with analog output 0-20 mA or 4-20 mA. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP3076ADAM

Module with 8 digital inputs and 8 digital outputs. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP8028ADAM

Module with 32 IO pins and 14 analog inputs. It communicates via the RS485, USB or Ethernet interface and supports the Modbus RTU/TCP protocol. The board is closed in an industrial housing. Numato Lab NLGM1005-A

A versatile expander supported by the I2C interface, which significantly expands the capabilities of microcontrollers and microcomputers. It is based on the ATSAMD09 microcontroller and comes with default software that can be modified to suit the needs of the project. Adafruit 3657

Module with 8 analog inputs for voltage measurement in the range from 0 to 10 V. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP3084ADAM

Module with 32 IO pins and 14 analog inputs. It communicates via the RS485, USB or Ethernet interface and supports the Modbus RTU/TCP protocol. Numato Lab NLGM1002-A

DAQ device based on USB communication and equipped with 8 counter inputs, 4 PWM outputs and 8 digital IOs. Digilent 6069-410-028

KAmod I2C Hub4 enables splitting the I2C bus into four independent outputs with a voltage level translation function, eliminating address conflicts and increasing connection flexibility. The module is intended for projects with multiple I2C devices requiring separation or diverse supply voltages.

32-channel IO expander with 7 analog inputs with 10-bit resolution. Communicates via USB interface. It has compact dimensions, making it suitable for small devices. Version with connector at the bottom. Numato Lab GP320002-B

KAmod Multiplexer features the CD4051 chip, which is an analog 8-channel multiplexer/demultiplexer. The chip can handle analog signals with an amplitude of up to 20 VPP and provides low on-state resistance. The active channel is selected through a sequence of states on three digital inputs

Module with 4 digital inputs, 4 outputs and 6 analog inputs. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP9039ADAM

DFRobot DFR1193 module with the LTC4316 chip enables the simultaneous use of multiple identical I2C sensors without address conflicts. It supports quick configuration via DIP switches or resistors, offering a flexible and reliable solution for IoT, robotics, and automation projects.

Crowtail – I2C Hub 2.0 expands the I2C bus with three additional ports, enabling the simultaneous connection of multiple devices in the Crowtail system. Useful in projects with a larger number of I2C modules.