MCP23017-promise
The MCP23017 is a 16-bit I/O expander with an I2C interface manufactured by Microchip.
MCP23017-promise is a node.js library written in TypeScript that offers a modern promise based interface to the usual commands of the chip.
The library does not handle the SPI interface of the MCP23S17.
Status: alpha software - work in progress. Licence: BSD 3 clauses.