TinyWireM vs. Wire for ATtinys
To save valuable flash memory on ATtinys when using I2C, you can use alternatives to Wire.h such as TinyWireM. I show how it works.
Read MoreTag: MCP23017
MCP23x1y Port Expander
I compare the members of the MCP23x1y family: MCP23016, MCP23017, MCP23S17, MCP23018, MCP23S18 and show how to control them.
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Port expander MCP23017
The 16-bit I/O port expander MCP23017 is introduced including a library. The functions are explained by sketches and circuits.
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ESP-01 port expansion
Port expansion for the ESP-01 using the MCP23017, PCF8574 and the 74HC595 shift register are explained in this post. With circuits and sample sketches.
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