MCP23017 I2C 16-Input/Output Port Expander 2305 Feather 32u4 FONA Adafruit -

Feather 32u4 FONA Adafruit - Feather 32u4 FONA Adafruit

What can I show on this display

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Weight: 10

but you can cut it depending on your needs

MCP23017 I2C 16-Input/Output Port Expander 2305 Feather 32u4 FONA Adafruit -Add another 16 pins to your microcontroller using a MCP23017 port expander. The MCP23017 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 16 general purpose pins. You can set each of 16 pins to be input, output, or input with a pullup. There's even the ability to get an interrupt via an external pin when any of the inputs change so you don't have to keep polling the chip. Use this chip from 2. 7 5. 5V (good for