✍ No matter how many ports an Arduino board has, they never seem to be enough for the cool new project you have in mind. Luckily there is a solution. The Arduino has both I2C and SPI pins, and there are a number of I2C and SPI GPIO chips, and modules built with those chips.

✍ By using this you can connect multiple such modules on the same I2C channel.

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▼ Specifications :
Operating voltage：3.0V - 5.5V DC
Drive chip: MCP23017
Number of IO: 16 (input, output, interruption)
Drive power supply: 25mA1
12C frequency: 100KHz, 400KHz, 1..7MHz
working temperature: -40 Celsius -125 Celsius
Parallel multiple: Up to 8
Driver: 51 and Arduino
Module size: 65mm*19mm

▼ Pin descriptions :
VCC: Power source input (3.0V-5.5V)
GND: Power negative electrode (0V)
SCL: 12C clock line (SCL connecting single chip IO pin or MCU 12C interface)
SDA: 12C data line (SDA connecting single chip IO pin or MCU 12C interface)
RST: Chip reduction (Low level effective, connecting MCU IO pin or unconnected)
ITA: GPIOA port interrupt output (Connect MCU IO pin, without connection when interruption)
ITB: GPIOB port interrupt output (Connect MCU IO pin, without connection when interruption)

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▼ Package list :
1 x Board
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???? Anything can ws us @ +6018 2870 232 ✅