pacomms
United Kingdom
Asked
— Edited
So i have bought an I2C display and controller for my robot, the ebay link is http://www.ebay.co.uk/itm/310246198837?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 , i can get the display to power up but cant get any characters to display on it, the default address is 0x42 so i am sending the following via a script
I2CStart() I2CWrites(0x42, "Test") I2CStop()
nothing happens, there is a link to a datasheet on the ebay page but i am a total noob with I2C, i get the idea but not sure what im doing wrong, the only thing i noticed is that on the ezb board the I2c interface is listed as SDA and SCL but on my display and controller that comes with it its listed as SCK and SDA ? have i gone and bought the wrong thing ?
Thanks Kurt
Sweet! The EZ-B has pull-ups, but sometimes the length of your wire (or device) requires additional. Let us know what ohm pull-ups you use to get it working. It'll help others.
You can try shortening the wire length to ~1 inch. That will probably prevent you from needing an additional pull-up.