CD74HC4067 16-Channel Analog Digital Multiplexer

The CD74HC4067 16-Channel Analog Digital Multiplexer is a 16-channel multiplexer board. It can be used in your Arduino, Raspberry Pi, and other projects when you need more output pins. This board provides analog and digital outputs, allowing you to increase the number of output pins by connecting 4 outputs from your circuit to obtain 16 outputs.

It supports UART, I2C, and SPI communication protocols. You can use it to connect the TX pins of 16 devices to one RX pin on your microcontroller. For two-way communication, you can add a second board to connect the TX line of your microcontroller to the RX lines of 16 devices.