Hello guys can any one help me connect the mcp2003 to arduino. I want to communicate via k-line diagnostic port I will supply the mcp 12v from the battery.
The inputs accept everything > 2V as HIGH. The outputs are open collector, need a pullup to the controller operating voltage.
if you can post a simple schematic so i can understand it better it could help a lot
See the pictures in the data sheet. Use INPUT_PULLUP for the input pins.
i connect it as the spreadsheet says but i cant get correct readings i only get FF 00 when i turn the ignition switch on but its a wrong reading. i used a 4.7k pullup at rxd with 5v but it does nothing.Im using softwareSerial library and tried different baudrates
but nothing changes. im using pin 9 for cs ,10 11 for rx tx