Cheap wireless transmission between two Arduinos with Infrared

Hi all, For a project, I was looking for a cheap solution to send data from an Arduino to an other one. The serial port was already taken, and my transmission (unidirectional) needed to be wireless. My researches has brought me to discover these kinds of radio modules (433MHz). They were available on the net, but I was still looking for something else. So, I remember that I have in my stock an IR receiver w ...

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