stop receiving command in master mode

main.c

@@ -561,6 +561,7 @@ void main(void)
 						nec_transmit(code); // transmit code
 						if (!master) {
 							master = true; // switch to master mode
+							IRM_ON_PORT->ODR.reg &= ~IRM_ON_PIN; // switch IR demodulator off
 							puts("\r\nmaster set\r\n");
 						}
 					}