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Using Multiple IO Expander MCP23S08 Address Issue - Networking, Protocols, and Devices - Arduino Forum
MCP23S08-E/P Microchip | Microchip 8-Channel I/O Expander SPI 18-Pin PDIP, MCP23S08-E/P | 403-636 | RS Components
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MCP23S17 Bidirectional 16-Bit I/O Expander SPI Serial Interface Shield Module I2C Interface 10 MHz Max High Speed Board - AliExpress
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