Howe can I get a button to start a RF 433MHz transmitter to send a message?

Projects Programming
6

Router 45
I wounder about this lines in your code

 // Turn on a light to show transmitting
 vw_send((uint8_t *)Sensor1CharMsg, strlen(Sensor1CharMsg));
 vw_wait_tx(); // Wait until the whole message is gone
 // Turn off a light after transmission
 delay(40);

I missing what is the code for tourn on and of the light?

Berti