PIC to PIC "wired" serial one-way communication - SERIN2/SEROUT2

[flotulopex]

...Do you have a Pull-Up resistor on the serial line?
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Yes, a 10k. The 1k2 resistor is connected between both PICs.

I'll have a try with a driven output.

[flotulopex]

Looking around the Internet for some additional information about IR transmission, I found out that i.e. SONY uses a Pulse Width Modulation protocol that looks simple to implement with PICs (http://www.sbprojects.com/knowledge/ir/sirc.htm).

So instead of trying to establish a "serial" communication, I'll have a go with PULSOUT/PULSIN.

Might be easier since the IR (hardware) layer is already working well.