Ok i'll try to explain better.
here's the circuit photos, @TomGeorge you should see the code in 1° post. isn't that visible to you?
The 2 megas are separated, but the problem remains even using just 1.
The problem i see is that tx led don't work when i power any arduino with battery or usb cable, so i guess it doesn't work.
Even pressing reset button, tx only light up after upload or opening serial monitor.
At this moment, i want to see that i receive data on the serial monitor from the receiving arduino mega.
the transmitter arduino is powered by 9vbattery and the other by usb.
the problem remains even if i exchange battery and usb cable between arduini.
I've also tried to exchange transmission role of the 2 arduini and reuploading the code.
Yep 9v is just temporary, but tx should turn on anyway, even without tx 433 module in.
how can you debug code with Serial1, isn't that the same with Serial?
now i'm trying connecting GND of both arduini and connecting directly tx arduino with rx arduino...
please make any other question you may need to understand
