The Time are functions do not work correctly when the processor clock speed is set at 128K How can I change The timers to work correctly when The processor clock is set to 128K instead of 16 M?
At present, using the delay function does not work correctly, The delay is far too long.
Add a new entry in boards.txt with the new value for f_cpu. Note that the timing functions will become far less precise at so low a speed.