APC220 + Arduino Nano issue


I'm having some issues trying to connect an Arduino Nano with a PC with the APC220 module

The code it's quite simple and it works vía USB, therefore I assume is not a code issue.

int ledPin = 13;
void setup()

void loop()
  digitalWrite(ledPin, HIGH);
  digitalWrite(ledPin, LOW);

The connection


VCC -> 5.5V
RX -> TX
TX -> RX

The bauds (via RFMAGIC) where set at 9600 for both modules.

In some forums I've read that the NETID and NODE ID should be the same on both modules, I've tried that. Doesn't work.
In other forums the NETID has to be the same on both modules and the NODE ID different. Tried, doesn't work.

I've tried with the chinese version and the original version of NANO, doesn't work wirelessly but works via USB on both cases.

I've tried with 434, 460, 470 MHz frequency.

I thought that the modules were bad ... but RFmagic works like a charm reading and writing.

Im out of ideas... Is there any chance that the EN pin has to be set?

Any advice, ideas or anything... doesnt matter how crazy it sounds.
Coulg it be an excess of frequencies on the air??

Thanks in advance.