https://forum.arduino.cc/index.php?topic=513096.msg3500819#msg3500819
check out that reply to my problem from the other day it has alot of good infomation for progmem...
https://forum.arduino.cc/index.php?topic=513096.msg3500819#msg3500819
check out that reply to my problem from the other day it has alot of good infomation for progmem...