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CEC firmware has support for 20x4. I am building a 20x4 myself.
On Wed, Jun 12, 2019, 13:34 Jakobus van der Merwe <zs6chk@...
You have to do some alterations in the firmware sketch yourself. Line 1 is indicated as 0. Line 2 as 1. Line 3 and 4 will then be 2 and 3. Line 3 and 4 you have to add. And what data you want there. There is no setting that will do it for you as far as I know.
J van der Merwe
On Wed, 12 Jun 2019, 19:27 Bill Lamm <kd9mdl@...
I have built and tested my v5, tuned in WWV and it was spot on.. next on the list is to test TX.. need to get the antenna to a happy SWR
I was given 2 20x4 blue screens, it comes up fine with 2 lines by about 16 wide. Is there a setting in factory firmware for the 4 line screen? CEC v1.121 still have settings for it? Did I see a reference to using a second screen? Trying to do what I can with what I have even though the nextion screen looks so cool..