altosui: Flush radio setting to serial device

When changing frequencies, make sure the device hears about it.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/altosui/AltosSerial.java b/altosui/AltosSerial.java
index c0eeb920..5d4510b4 100644
--- a/altosui/AltosSerial.java
+++ b/altosui/AltosSerial.java
@@ -348,6 +348,7 @@ public class AltosSerial implements Runnable {
 				       setting, telemetry_len());
 			else
 				printf("c R %d\nc r 0\n", setting);
+			flush_output();
 		}
 	}