diff --git a/rpitx.py b/rpitx.py
index 060667f3..5a486d94 100644
--- a/rpitx.py
+++ b/rpitx.py
@@ -258,7 +258,7 @@ if __name__ == "__main__":
 	GPIO.setmode(GPIO.BCM)  # added to make Tx LED work on Pi 4
 	GPIO.setup(txLed, GPIO.OUT)
 	
-	sleep(1)
+	sleep(10)  # delay so cubesatsim code catches up
 	
 	system("echo 'hi hi de " + callsign + "' > id.txt && gen_packets -M 20 /home/pi/CubeSatSim/id.txt -o /home/pi/CubeSatSim/morse.wav -r 48000 > /dev/null 2>&1")