The DFR0009 is well known for its 5 buttons to A0 implementation, but it uses a shed load of Arduino pins.
Does anyone know of a similar shield (or not necessarily a shield actually) which has buttons like the DFR0009's but over I2C?
The DFR0009 is well known for its 5 buttons to A0 implementation, but it uses a shed load of Arduino pins.
Does anyone know of a similar shield (or not necessarily a shield actually) which has buttons like the DFR0009's but over I2C?
ByVac makes some LCD backpacks that support a keypad and some generic i/o pins.
They can use i2c or async serial.
Adafruit has several with different character themes
Thanks MarshaJ847, I'll follow up with my local supplier. (edit: He knows about them and is including some in his next AF order.)
Seems that even the A0 pin is returned to service?- the way I read it, only the I2C pins are used so presumably the buttons get read that way too, not through A0 as in the old DFR0009 product. As always I see adafruit provide a library....
edit: Just read a bit more and indeed, it needs only the I2C interface for the LCD and the buttons.
I like these, must say.