Using KeyMap4MacBook (https://pqrs.org/macosx/keyremap4macbook/) to remap the Logitech R400 Presenter to work on Keynote

private.xml

<?xml version="1.0"?>
<root>
  <devicevendordef>
    <vendorname>LOGITECH</vendorname>
    <vendorid>0x046d</vendorid>
  </devicevendordef>

  <deviceproductdef>
    <productname>R400</productname>
    <productid>0xc52d</productid>
  </deviceproductdef>

  <item>
    <name>Keynote R400: start presentation</name>
    <identifier>private.deviceproductdef</identifier>
    <device_only>DeviceVendor::LOGITECH, DeviceProduct::R400</device_only>
    <autogen>__KeyToKey__ KeyCode::DOT, KeyCode::B</autogen>
    <autogen>__KeyToKey__ KeyCode::F5, KeyCode::P, ModifierFlag::COMMAND_L | ModifierFlag::OPTION_L</autogen>
  </item>
</root>