DIY: Migration sketch/build-up Arduino Mega2560 to Uno R3

so, 😉
hello, nothing new in particular..got today my “Geekcreit® UNO R3 ATmega328P” for roundabout 3€ (i order there sometimes because of (in general) faster shipping times then Aliexpress)->
https://www.banggood.com/UNO-R3-ATmega328P-Development-Board-For-Arduino-No-Cable-p-964163.html

nothing special, except u have to use “Pin3” instead of “Pin9” on the Mega2560 for irsend..
(made a long post in the forum->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=28)

greets 😉