Dual I2C Enabled Heavy Duty 4x4 Matrix Keypads With I2C Bus Adapters For Arduino ESP32 S3 Raspberry Pi And IoT Projects Convert Standard 8 Pin Matrix To I2C Bus Using SDA And SCL Pins

Dual I2C 4x4 Matrix Keypad Kit with I2C Adapters
✔️ 2-Pack heavy-duty 4x4 keypads with I2C adapters, 16 tactile keys

This kit combines two rugged 4x4 matrix keypads with dedicated I2C bus adapters, letting you connect via SDA and SCL. Ideal for Arduino, ESP32-S3, Raspberry Pi, and IoT projects where GPIO is precious for sensors, displays, or controllers.

✅ Dual I2C-enabled 4x4 matrix keypads with dedicated I2C adapters
✅ Saves 6 GPIO pins compared to traditional 4x4 matrix keypads
✅ 16 keys: 0-9, A-D, *, #
✅ Low contact resistance under 100 Ω
✅ Actuation force 160-180 g for reliable input
✅ Compact form: 69 mm x 65.5 mm x 9.7 mm; 21 g per unit
✅ Breadboard-friendly headers for quick wiring

💡 What is an I2C keypad and why use it in microcontroller projects?

- Handy for door locks and access control panels
- Reduces GPIO usage by using the I2C bus for keypad devices
- Compatible with Arduino, ESP32, Raspberry Pi and other microcontrollers