This has been posted to the "Files" section but it is sometimes difficult to find there so just to make sure I'm re-uploading it here as an attachment.? This is a very comprehensive update - The I2C bus on the Raduino card is used to drive a small controller card that attaches to the LCD display and now those of you who were wanting the A3, A6 and A7 analog inputs back to use for "Meter" programming can have them.? Since using the I2C bus to control the display frees up the D8, D9, D10, D11, D12 and D13 digital I/O pins on the Arduino Nano, we have reprogrammed the CW Paddles, Hand Key, and even the SSB Push to Talk lines to digital I/O's.? We fount that, since you don't use PTT in CW and you normally don't use the Keys in SSB that one digital I/O input could serve as Hand Key/External Keyer AND SSB Push to talk depending on the mode selected in the menu.? We put the Keyer DOT on D8, Keyer DASH on D11 and the PTT/Hand Key/External Keyer input on D12.? We didn't use D13 because it's used to drive one of the LED's on the Arduino Nano and requires some extra trickery to use as an input.? We also added an extra push button switch tied to the D10 input.? This button toggles the A/B VFO's and if you press and hold it for a short period, it enters SPLIT mode.? All of this and the hardware modification instructions are contained in the PDF documentation included in the zip file.? Lots of photographs are included in the manual to assist the user with the modifications and operation of the software after the mods are finished and the software installed.? You must perform the modifications first as the software cannot be used with the standard, Raduino mounted display as those digital I/O lines are used for CW/PTT operation after they are freed up by the I2C mods.
Jim Sheldon, W0EB and Ron Pfeiffer, W2CTX
Jim Sheldon