MCP23017 Archive • Wolles Elektronikkiste

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.

MCP23x1y Port Expander

I compare the members of the MCP23x1y family: MCP23016, MCP23017, MCP23S17, MCP23018, MCP23S18 and show how to control them.

Port expander MCP23017

The 16-bit I/O port expander MCP23017 is introduced including a library. The functions are explained by sketches and circuits.

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.

Wolles Elektronikkiste

Die wunderbare Welt der Elektronik

Tag: MCP23017

TinyWireM vs. Wire for ATtinys

MCP23x1y Port Expander

Port expander MCP23017

ESP-01 port expansion