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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HC-05 and HC-06 Bluetooth modules
Detailed and step-by-step instructions for HC-05 and HC-06 Bluetooth modules. AT commands, circuit, pairing and testing of the Bluetooth connection.
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