I've bought an arduino 101 and a i2c screen but i can't use it together. The screen is 2004A with i2c module using a pcf8574t.
screen > board connection is
gnd > gnd Vcc > 5v sda > sda dedicated pin scl > scl dedicated pin
the screen turn on and the MultiSpeedI2CScanner.ino linked here http://forum.arduino.cc/index.php?topic=197360 found it at 0x27 address
I think the connection is ok but i can't write anything on the lcd I've tryed a lod of i2c libraries but they don't compile or don't work
What library i can use for do this?