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Best Io Modules of 2026
Best Choice
1
frientfrient IO Module - Zigbee Smart Home Interface for Wired Devices | Input/Output Module for 5-28V appliances with 4 inputs and 2 outputs. Compatible with Homey and SmartThings.
9.9
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
2
WaveshareWaveshare Compute Module 5 IO Board, Compatible with All Variants of Raspberry Pi CM5, with PoE Feature, Single Board Only
9.8
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Value for Money
3
YoumileYoumile 2 pcs PCF8575 IO Expander Board Module I2C to 16IO Module I/O Extension Shield Module 16 bit SMBus I/O Ports with Dupont cable for Arduino UNO R3
9.6
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
4
YoumileYoumile 5 pcs PCF8574 IO Expansion Board PCF8574 I/O Expander I2C Evaluation Develop Module with DuPont Cable for Arduino & Raspberry Pi
9.4
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
5
HengantechHengantech I/O Expander IO-E017 MCP23017 16-Ch I2C for Raspberry Pi | 3.3V/5V, 16 GPIO, INTA/INTB, 3-bit DIP for 8 I2C addresses, PH2.0, open-source code for Pi/Arduino/STM32
9.3
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
6
CQRobotCQRobot MCP23017 16-bit I/O Expander Module for Arduino Raspberry Pi STM32
9.0
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
7
Sky4LessSky4Less IO-Link IO-Box Modulator for Magic Eye Sky HD Box
8.7
Very Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
8
SEENGREATMCP23017 I2C GPIO Expander Board, 16-Bit IO Module | 16-bit GPIO expansion module with 3.3V/5V support, DIP address switch and PH2.0 cable for Raspberry Pi Arduino STM32
8.4
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9
WaveshareNano Base Board (A) for Raspberry Pi Compute Module 5 Lite/eMMC,Suitable For Evaluating The Raspberry Pi CM5 Or Being Integrated Into End Products
8.3
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
10
WaveshareWaveshare Mini Base Board for Raspberry Pi Compute Module 4 CM4, Onboard CSI/DSI/FAN/HDMI/USB/Gigabit Ethernet/Micro SD Slot/M.2 Slot Connectors, for Evaluating CM4 or Integrated into End Product
8.1
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
