Not working on Arduino mega

[brainkiller]

I've recently bought a arduino mega and shield ready for rflink firmware (Arduino mega pinout: https://lynx2015.files.wordpress.com/2015/08/arduino-mega-pinout-diagram.png) The connections are documented here: http://www.rflink.nl/blog2/images/rfl_sch.jpg But I'm unable to figure how to adapt the port registry (I tried register J (DDRJ and PORTJ) but I'm not getting any response from the somfy engine.

Would you guys have some pointers to get this working ?

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define PORT_TX 0 // 14 of PORTD = DigitalPin 14

void setup() { Serial.begin(115200); pinMode(15, OUTPUT); digitalWrite(15,HIGH); DDRJ |= 1 << PORT_TX; // Pin 5 an output PORTJ &= !(1 << PORT_TX); // Pin 5 LOW

[Nickduino]

Easy pointer: forget the direct PORT manipulation and use digitalWrite instead, the timing isn't that critical 😉