Adding an mcp23017 16 port io expander to arduino or esp8266 or attiny85 or…… – Artofit

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Adding an MCP23017 16 port IO expander to Arduino or Esp8266 or Attiny85 or……..

Update 2023: After a year’s shortage of the MCP23017 it appears to be available again. However the new batch, coded as MCP23017D misses 2 I/O lines: PA7 & PB7Update:After I made this expa…
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Adding an MCP23017 16 port IO expander to Arduino or Esp8266 or Attiny85 or……..

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