fldigi 126.96.36.199 corrects WPM timing issues with MORTTY used with nanoIO sketch versions 1.4.0 and 1.4.1,
nanoIO sketch 1.4.1 provides improved dot-dash-space timing,
If you elect to install the nanoIO sketch version 1.4.1 be sure
to set the sketch baud to the desired rate, default is 9600.
Accurate WPM timing requires some compensation to achieve very accurate results.
Open the fldigi configuration dialog to the nanoCW panel
Select the correct port, set the baud to 9600 or the baud compiled into the sketch. Press the connect. The connect may take a second or two. When connected the "CW i/o" indicator will be checked and the status echo displayed in the text panel.
Execute the WPM compensation by:
You can tweak the "Comp'" value if you are not satisfied with the computed value.
Results shown for 24 WPM compensation on Windows 7. The compensation is primarly a correction for read/write on the Arduino serial port and will be dependent on the OS and OS version.
You can perform the test again and the transmit time should be
within 20 milliseconds of 1 minute.
73, David, W1HKJ