Ported from master to next:

#1489: TRACE() output intercepted and shown in Companion (shortcut F6)
#1270: simple Trainer Simulator (shortcut F5)
#1466: telemetry simulator (shorcut F5)

radio/src/targets/sky9x/telemetry_driver.cpp

@@ -181,8 +181,10 @@ uint32_t telemetryTransmitPending()
 
 void telemetryPortInit(uint32_t baudrate)
 {
+#if !defined(SIMU)
   UART2_Configure(baudrate, Master_frequency);
   startPdcUsartReceive();
+#endif
 }
 
 void telemetryTransmitBuffer(uint8_t * buffer, uint32_t size)