The MSP300 is an industrial digital pressure transducer. This library implements the I2C version (J) of the sensor. The code is written based upon the datasheet, it is not actually tested by me yet.

The I2CKeyPad library implements the reading of a 4x4 keypad by means of a PCF8574. Smaller keypads, meaning less columns or rows (4x3) can be read with it too. Since 0.3.2 the library allows a 5x3, ...