Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Best Choice Create idea 
Create idea 16-ch IO Expansion Pin Module Board I2C Interface IIC Input Output MCP23017-E/SS for Computer Game Console It is suitable for computer peripherals, game console control, smart home, sensor management, motor control, LED matrixBest Value Comimark 
Comimark 3Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander Module for Arduino & Raspberry Pi Compatible with Arduino and Raspberry Pi.Waveshare 
Waveshare Industrial 8-Ch Digital Input & Output Module, DC 7~36V Wide Voltage Power Supply, Modbus RTU Protocol, Multip HDPQNHWA 
8-Way 1-Wire DS18B20 Digital Temperature Sensor Modbus RS485 Analog IO Module for PLC Paperless Recorder Thermostatic Co In order to collect temperature more stably, it is recommended that the cable length of the DS18B20 probe should not excYOURRYONG 
3Pcs DY-SV17F Voice Playback Module IO Trigger USB Download 4MB Serial Port Control Voice Module Voice Playback Module: Enables voice control and playback functionality for your PCSenzooe 
5PCS Mini MP3 Player Module MP3 Voice Decode Board Supporting TF Card U-Disk IO/Serial Port/AD 5PCS Mini MP3 Player Module MP3 Voice Decode Board Supporting TF Card U-Disk IO/Serial Port/ADWegiwuca 
MCP23017 I2C I/O Expander Module Built-in and Low Power Consumption for IoT Devices Low Power Consumption I/O Expansion Optimizes smart home controllers and sensor arrays by adding multiple connections through 128 ports cascading GPIO expanRakstore Rakstore MCP23017 I2C Interface 16 Channel IO Expansion Module IIC Expansion Board This module is a 16-way IO extension module with 12C interface, built into the MCP23017 chip of MicroChipWaveshare Waveshare Mini Base Board Type B Designed for Raspberry Pi Compute Module 4, Only CM4-IO-BASE-B Base Board Included I am the Raspberry Pi Compute Module 4 basic expansion boardOEBUAFI OEBUAFI Versatile IO Extension Module IIC Expansion Board with Flexible Configuration for Electronic Components Enthusia [EASY INTEGRATION]: Compact board size of 66 x 18mm for seamless integration into projects.Waveshare Waveshare Compute Module 5 IO Board, Compatible with All Variants of Raspberry Pi CM5, with PoE Feature, Single Board On Standard CM5 socket and Raspberry Pi 40PIN GPIO header suitable for all variants of Compute Module 5YIQFOCA 5 Set 3V 1 Channel Relay Power Switch Board, High Level Driver Optocoupler Module Isolated Drive Control Board for ESP82 You will recevie 5Pcs 3v Relay 1 Channel power switch module compatible with 10A 250VAC and 10A 30VDC load.5pcs * 2.5 mmWaveshare Waveshare Compute Module IO Board with PoE Feature Designed for Raspberry Pi Compute Modules CM3 / CM3L / CM3+ / CM3+L Raspberry Pi GPIO header, for connecting sorts of Raspberry Pi HATsRakstore Rakstore 2pcs PCF8575 Module Expansion IO Port Expander Board DC 2.5-5.5V I2C Communication Control 16 IO Ports Working voltage: 2.5-5.5V DC；Working current: 100mA (MAX)EC Buying EC Buying LD2410C Sensor Module HLK-LD2410 Human Presence Radar Sensor Module LD2410 Millimeter Wave Radar Sensor Module LD2410C is a high sensitivity 24GHz human presence state sensing module. Its working principle is to use FMCW FM continu36% Off XIITIA XIITIA 3pcs LD2410C Human Presence Radar Sensor Module HLK-LD2410 Sensor Module LD2410 Millimeter Wave Radar Sensor Modu ★24GHz ISM band, the farthest sensing distance is up to 5 meters, the detection angle is large, and the coverage range cMiZOELEC ATMEGA32U4 Pro Micro USB Leonardo R3 Module for Arduino Development Board 3.3V 5V 16MHZ 16M PWM Channel IO Port Cable ATMEGA32U4 Pro Micro USB Leonardo R3 Module for Arduino Development Board 3.3V 5V 16MHZ 16M PWM Channel IO Port CableACEIRMC ACEIRMC 3pcs PCF8575 IO Expander Board Module I2C to 16IO IIC I2C I/O Extension Shield Module 16 bit SMBus I/O Ports for for Arduino available library: PCF8575; Working voltage: 2.5 - 5.5VDCWaveshare Mini Base Plate for Raspberry Pi CM5 Lite/eMMC Series, Compute Module 5 Mini IO Board with CM5 Socket/40PIN GPIO Head/RJ Mini Base Board for Raspberry Pi Compute Module 5 Lite/eMMC series module, with onboard CM5 socket, Gigabit Ethernet RJ4HDPQNHWA 8-Way 1-Wire DS18B20 Digital Temperature Sensor Modbus RS485 Analog IO Module for PLC Paperless Recorder Thermostatic Co In order to collect temperature more stably, it is recommended that the cable length of the DS18B20 probe should not excUtopially Utopially 2X DY-SV5W Voice Playback Module for MP3 Music Player Voice Playback Amplifier 5W SD/TF Card Integrated UART I Fully support FAT16/FAT32 file system, maximum support 32G TF card.IO Crest IO CREST M.2 M-Key PCI-e 3.0 Interface Single Port 5.0 Gigabit Ethernet Modules Supports 5G Lite (2.5G data rate) mode, 2.5G Lite (1G data rate) and GIGA Lite (500M data rate) modeLT Easiyl LT Easiyl 5Pcs DFPlayer Mini MP3 Player Module Audio Voice Board MP3 Voice Decode Board Supporting TF Card/U-Disk/IO/Ser Supports Multiple Sample Rates: Supports sampling rates of 8/11.025/12/16/22.05/24/32/44.1/48 KHz.AOICRIE AOICRIE 5PCS PCF8574T PCF8574 IO Expansion Board Module I2C IO Expander Module (5 PCS) ✔I2C interface, I / O expansion module, two I / O scalability 8 I / O (up to 8 simultaneous use the PCF8574 expanded toHDPQNHWA 23IOA08 8CH DC 12V-24V NPN/PNP Input& 8CH NPN 300MA Solid State Relay Output Modbus Rtu RS485 IO Module(8CH PNP with Box Working Voltage: DC 6.5-30V (9V, 12V, 24V) Working Current: 8-50MACryfokt MOSFET Module, with Indicator MOS Tube Module, Quick Connection Strong Anti-Interference Ability for High Power Equipmen Stable Performance: MOS Tube Module uses high-quality ultra-small optocouplers with strong anti-interference ability, stLIYJTK Control Module IO 8ch RTU UART TTL232 Controller Board with Pin DC 12V TL19A08 for Smart Home Automation [EASY RELAY CONTROL] Under the AT command mode (M0 Connect), you can easily control the relay through a simple AT commanLNAUIDB for CA2-IO16T Remote IO Module - 16 in Out Digital Transistor Communication Expansion for Automation Systems Enhance your automation systems with the CA2-IO16T Remote IO Module, featuring 16 digital inputs and 16 digital outputsUeeKKoo Metal Case Compatible with Raspberry Pi Official Compute Module 5 IO Board, Comes with CM5 Cooling Fan and 40PIN GPIO Ad Metal Case for Official Compute Module 5 IO Board, Comes with CM5 Cooling Fan and 40PIN GPIO Adapter. ( Note: official CNooElec Nooelec SAWbird+ iO - Premium Saw & Cascaded Ultra-Low Noise LNA Module for Inmarsat Applications. 1542MHz Center Freque SAWbird+ iO is a self-contained LNA module designed for capturing L-Band signals, particularly Inmarsat AERO and STD-CaPodazz Podazz 3Pcs PCF8575 Board Module IO Expansion Board Module I2C to 16IO IIC I2C I/O Port Expansion Board 【I2C Addressability】The default I2C address is 0x20, but this can be altered by soldering the A1 and A2 selection pads,Aswalling Aswalling DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Board 16 channels output (ULN2803 NPN output)A-DIGISHUO A-DIGISHUO BME280 5V Ttemperature Humidity Barometric Pressure Sensor Module IIC I2C Suitable for Arduino *The BME280 sensor module can not only measure temperature and pressure, but also humidity.Gearwell Gearwell RS485 IO Module, Digital Input Output Board, 8DI 8DO Optical Isolation, Industrial Control Module, DC 7-25V Com 8 CHANNELS: 8 channels optical isolation digital input (NPN low level input) and output (ULN2803 NPN output), with a maxJimcat star 6Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander Module 6Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander ModuleQCCAN 8PCS PCF8574 IO Expansion Board Module I/O Expander I2C-Bus Evaluation Development Module PCF8574 Blue module function: I2C interface, I/O expansion module, two I/O scalability 8 I/O (up to 8 simultaneous use tQCCAN 8PCS PCF8574 IO Expansion Board Module I/O Expander I2C-Bus Evaluation Development Module PCF8574 Blue module function: I2C interface, I/O expansion module, two I/O scalability 8 I/O (up to 8 simultaneous use tGearwell Gearwell Remote IO Module, Data Acquisition Controller, Digital Input Output Module, 16 in 16 Out Transistor PLC Expansi 16 INPUT 16 OUTPUT: Remote IO data acquisition module, 16 channels input and 16 channels output, with stable performanceAITIAO AITIAO 10Pcs PCF8574 IO Expansion Board Module I/O Expander I2C Bus Evaluation Development Module PCF8574 IO expansion chip with I2C interface, 8-bit parallel port outputWaveshare Waveshare Raspberry Pi Compute Module 4 IO Board with PoE Feature Suitablr for All Variants of CM4 Suitable For Evaluating The Raspberry Pi CM4 Or Being Integrated Into End ProductsJustivana Justivana RS485 Ethernet 16DI Expansion Remote IO Module CDSENET GAXXXA000 Analog Switch Acquisition Modbus RTU Works RS485 Ethernet 16DI Expansion Remote IO ModulePqredg Pqredg PCA9555 Module IO Expansion Module GPIO Level Conversion 16-Way Non-MCP23017 PCF8575 PCA9555 The special chip of -GPI0-KB module is PCA9555 of NXP company, which is a 40-bit general GPI0 expansion chip with 56-pinTreedix Treedix 5PCS IO Expansion Module I/O Expansion Module I2C Compatible with AVR STM8 C8051F Arduino The PCF8574 IO expansion board provides universal remote I/O expansion through a two-wire bidirectional I2C bus (serialBjworeye Bjworeye PCA9698 Module IO Expansion Module GPIO Level Conversion 16-Way Non-MCP23017 PCF8575 PCA9698 The special chip of SX-GPI0-KB module is PCA9698 of NXP company, which is a 40-bit general GPI0 expansion chip with 56-pxelea xelea PCA9698 Module IO Expansion Module GPIO Level Conversion 16-Way Non-MCP23017 PCF8575 PCA9698 The special chip of SX-GPI0-KB module is PCA9698 of NXP company, which is a 40-bit general GPI0 expansion chip with 56-pByttlerom Byttlerom RS485 Ethernet 16DI Expansion Remote IO Module CDSENET GAXXXA000 Analog Switch Acquisition Modbus RTU Works Analog Switch AcquisitionAnlayliay Anlayliay DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Board open "close" "Momentary" "Self-locking" "Interlock" "Delay" 6 CommandsHeevhas Heevhas PCF8574 IO Expansion Board I/O Expander I2C Bus Evaluation Development Module MCU Expansion Board Module (Pack o 【Bus Interface】Working voltage: 3.3V/5V, including a quasi-bidirectional 8-bit port and an I2C bus interface.KiRYu DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Board 16 channels Darlington output (ULN2803 NPN output)CHICIRIS CHICIRIS PWM 4-Channel Motor Driver Module, 3-20V to 3.7-27VDC 10A MOS FET Board for PLC System, Stepper Motor Speed Con [STRONG ANTI-INTERFERENCE] Equipped with optocoupler to eliminate interference and ensure stable performance.DIANN DIANN PN532 NFC NXP RFID Module V3 Kit Near Field Communication Reader Module Kit I2C SPI HSU with S50 White Card Key Ca Power Voltage: 3.3V-5VRakstore Rakstore Voice Playback Module MP3 Music Player UART I/O Trigger Amplifier Class D 5W SD/TF Card for Arduino Work Voltage:DC 5VUeeKKoo Compute Module 5 PoE Base Board, CM5 IO Board with PoE Feature, Support POE and Type C Power Supply/M.2 NVMe Solid State Compute Module 5 PoE Base Board ( Compute Module 5 IO Board with PoE Feature ) for Compute Module 5 Variants ( All VersiVKLSVAN VKLSVAN 3PCS DFPlayer Mini MP3 Player Board Module MP3 Voice Decode Board Support TF Card U-Disk IO/Serial Port/AD Audio This is a MP3 Player Audio Voice Module, can be connected directly to the speaker.Playing specified music and functionsZORZA ZORZA - LD2420 24GHz smart radar sensor module, low power human presence and motion detection module, 50mA, 3.3V, series INNOVATIVE PRECISION FOR YOUR SAFETY - Equipped with the advanced LD2420 24GHz mmWave radar sensor technology, this smarLNAUIDB for CA2-IO8R-A Remote IO Module - 8 Digital Inputs & Analog Outputs, Versatile Communication & Control Versatile 8 in 8 out configuration: 8 digital inputs and 8 analog outputs for flexible control in industrial applicationQalvona M420T Ethernet Remote IO Module 16 Way DO to for Modbus TCP RTU Analog Input Network IO Controller (0-5V) [Protocol Compatibility]: Supports Modbus , Modbus RTU over , and protocols ensuring versatile and reliable network commQalvona M420T Ethernet Remote IO Module 16 Way DO to for Modbus TCP RTU Analog Input Network IO Controller (4-20mA) [Protocol Compatibility]: Supports Modbus , Modbus RTU over , and protocols ensuring versatile and reliable network commLrocaoai 2X DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Board 16 channels output (ULN2803 NPN output)Yosoo 2G/3G Glue Stick Antenna Io Modules Dtu for Nb Gprs 2G Glue Stick for Sticky Glue 5Pcs Io Modules Summary Of Selling Points: sophisticated design, description of selling points This product a hexagonal and inner hexagoJESSINIE JESSINIE 2Pcs DY-SV17F Voice Playback Module IO Trigger USB Download 4MB Flash Voice Playback Module Serial Port Control DY-SV17F is an intelligent voice module, integrated with IO segmented trigger, UART serial port control, ONE_ Line singlVoniecop Voniecop 2X DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Boa open "close" "Momentary" "Self-locking" "Interlock" "Delay" 6 Commandseiuie TU842 3BSE020850R1 IO Module 🔎Mfr. Part #: TU842 3BSE020850R1(Used)QWUUYEC Ethernet Remote IO Module 16 Way DO, Modbus RTU Network IO Controller, Metal Enclosure IP30 - Industrial Grade Communica [Protocol Compatibility]: Supports Standard Modbus , Modbus RTU over , and Protocol ensuring seamless industrial communiQWUUYEC Ethernet Remote IO Module 16 Way DO, Modbus RTU Network IO Controller, Metal Enclosure IP30 - Industrial Grade Communica [Protocol Compatibility]: Supports Standard Modbus , Modbus RTU over , and Protocol ensuring seamless industrial communiRakstore Rakstore 2pcs JDY-40 2.4G Wireless Serial Port Transmission Transceiver Remote Communication Module IO TTL DIY Electroni Operating frequency range: 2.4G ；Transmit power: max 12dbLrocaoai 4X DC 12V 24V 16 Input 16 Output RS485 Remote Control Switch PLC IO Expansion Board Modbus RTU Module, Only Board 16 channels output (ULN2803 NPN output)Suesacy Suesacy DY-SV5W Voice Playback Module for MP3 Music Player Voice Playback Amplifier 5W SD/TF Card Integrated UART I/O Tr LNAUIDB for PN1-IO16T Remote IO Communication Module - 16 Digital Inputs & Outputs, Transistor, Single Network Port for PN Bus E High-performance PN1-IO16T Remote IO Communication Module designed for seamless integration into industrial automation sLNAUIDB for EC2-IO16R EtherCAT Remote IO Module - 16-Way for Distributed Digital and Analog Acquisition High-performance EC2-IO16R EtherCAT Remote IO Module designed for seamless integration in industrial automation systems.Waveshare Waveshare Metal Box (A) for Raspberry Pi Compute Module 4 IO Board with Cooling Fan Designed For Raspberry Pi Compute Module 4 IO BoardLNAUIDB for PN1-IO8R-A Remote IO Communication Module - 8 Digital Inputs & Outputs, 6 Analog & 2, PN Bus Expansion, Single Netwo Enhance your industrial automation with the PN1-IO8R-A Remote IO Communication Module, featuring 8 digital inputs and ouWaveshare Waveshare CM4-IO-BASE-BOX-A for Raspberry Pi Compute Module 4 Bundle with USB HDMI Adapter (10 items) Mini-Computer Based On CM4 Designed for Raspberry Pi Compute Module 4khadas Khadas Edge2 IO Module with UHS-I SD card reader, dual-channel infrared receiver, 3.5mm headphone jack, 16-pin GPIO, and The Khadas Edge2 IO Module is a GPIO break-out board for the Edge2 that expands the functions of Edge2 by connecting toLNAUIDB for EC2-IO16T EtherCAT Remote IO Module - 16-Way Transistor Digital and Analog Acquisition Expansion High-performance EC2-IO16T module designed for seamless integration in EtherCAT networks, enhancing your automation systLangSheng EC2-IO16T EtherCAT Remote IO Module IO Expansion Acquisition Module 485 Switching 16-Way Transistor Digital EC2-IO16T EtherCAT Remote IO Module IO Expansion Acquisition Module 485 Switching 16-way Transistor DigitalLNAUIDB for EC2-IO8R-A EtherCAT Remote IO Module - 8-Way for Digital and Analog Acquisition Expansion Enhance your automation system with the EC2-IO8R-A EtherCAT Remote IO Module, designed for seamless digital and analog sNooElec Nooelec SAWbird iO - Premium Dual Ultra-Low Noise Amplifier (LNA) & Saw Filter Module for Inmarsat Applications. 1542MHz SAWbird iO is a self-contained LNA module designed for capturing L-Band signals, particularly Inmarsat AERO and STD-CWAGO Wago 753-504 Digital and Analogue Module I/O - Digital and Analogue I/O Module Wago 753-504LangSheng EC2-IO8R-A EtherCAT Remote IO Module IO Expansion Acquisition Module 485 Switching 8-Way Relay Digital Analog EC2-IO8R-A EtherCAT Remote IO Module IO Expansion Acquisition Module 485 Switching 8-way Relay Digital Analogeiuie CC-Link IO Module AJ65SBTB2-8D eiuie IO-Module 6ES7322-1HF01-4AA2S7-300 PLC Module 6ES7 322-1HF01-4AA2 eiuie IO-Module 6ES7321-1BH50-4AA2 S7-300 PLC Module 6ES7 321-1BH50-4AA2 🔎Model No:6ES7321-1BH50-4AA2eiuie Discrete IO Module 170ADM39030 PLC Module 170-ADM-390-30 eiuie IO-Module 6ES7321-1BL00-4AA1S7-300 PLC Module 6ES7 321-1BL00-4AA1 UeeKKoo Mini Base Board Compatible with Raspberry Pi Compute Module 5 Lite/eMMC Series, CM5 Base Board with Color-Coded 40PIN GP This is Mini Base Board (A) with standard CM5 socket and color-coded RPi 40PIN GPIO header, compatible with Compute Modueiuie IO-Module 6ES7321-1BH02-4AA2 S7-300 PLC Module 6ES7 321-1BH02-4AA2 eiuie IO-Module 6ES7321-1BH02-4AA1 S7-300 PLC Module 6ES7 321-1BH02-4AA1 eiuie IO-Module 6ES7321-1BH50-4AA1 S7-300 PLC Module 6ES7 321-1BH50-4AA1 eiuie IO-Module 6ES7322-1HF01-4AA1 S7-300 PLC Module 6ES7 322-1HF01-4AA1 Rakstore Rakstore 1.8 inch TFT Module LCD Display Module with PCB backplane SPI Serial Port 4 IO Display color: 16BIT RGB 65K color；Resolution: 128*160 (Pixel)eiuie IO-Module 6ES7321-1BL00-4AA2S7-300 PLC Module 6ES7 321-1BL00-4AA2 eiuie IO-Module 6ES7321-1FH00-4AA1S7-300 PLC Module 6ES7 321-1FH00-4AA1 Auoeer PCF8574 PCF8574T Module IO Extension I/O I2C Converter Board for - Products That Work with Official for Boards I/O expansion module based on I2C interface, can expand 8 I/Os with 2 I/Os (more than 8 PCF8574 can be used simultaneousDIGISHUO DIGISHUO 5Pcs TXS0108E High Speed Full Duplex 8 Way 8 Channel Level Conversion Module 8-Bit 8 CH Logic Level Bi-Directio ※8-channel level conversion module adopts TXS0108E chip to provide bidirectional communication capabilityeiuie CC-Link Remote IO Module DC Input Terminal Block AJ65BTB2-16D khadas Khadas Edge2 IO Module with UHS-I SD Card Reader, Dual-Channel Infrared Receiver, 3.5mm Headphone Jack, 16-pin GPIO, and The Khadas Edge2 IO Module is a GPIO break-out board for the Edge2 that expands the functions of Edge2 by connecting toeiuie IO-Module 6ES7322-1BH01-4AA2S7-300 PLC Module 6ES7 322-1BH01-4AA2 Waveshare Raspberry Pi Compute Module 4 IO Board A for CM4 Support PoE Dual MIPI DSI Display Interface and Dual MIPI CSI-2 Camera The Compute Module 4 IO Board is a companion board for Raspberry Pi Compute Module 4.eiuie CC-Link Remote IO Module DC Input Terminal Block AJ65BTB2-16D