Greetings Ioannis,

thank you so much for your help.

The sending device is actually running on a loop to troubleshoot the issue. I failed to copy that in here but it's something like this:

Code:
main:

debug PreAmble,$af,$c2,$b5,$ef,13,10


pause 3000


goto main
The receiving pic is also on a loop and that's the reason for the pause 3000 before going back to Main.