This library gives easy control over the 16 pins of a TCA9555 device. The pins can be used for INPUT (default) and OUTPUT, and allow to set polarity. The pins can be set per single pin, or with a mask ...
This library gives easy control over the 16 pins of a (SPI) MCP23S17 chip. This IC is strongly related to the MCP23017 I2C port expander - https://github.com ...
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