From 8d02c152dc599f1f4a32f86ec3336d0515f7132d Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Wed, 17 Aug 2022 07:03:37 -0400
Subject: [PATCH] fix strlen

---
 cubesatsim/cubesatsim.ino | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 6d7b20ee..d7c559cc 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -3731,7 +3731,7 @@ void prompt_for_input() {
 		  
       print_string(serial_string);
 		  
-      if (strlen(callsign) > 0)	{	  
+      if (strlen(serial_string) > 0)	{	  
         strcpy(callsign, serial_string);
         Serial.println("Callsign updated!");
       } else
@@ -3796,8 +3796,9 @@ void prompt_for_input() {
 
 void get_serial_string() {
   int input = 0;	
-  int i = 0;	
-  while ((input != '\n') && (input!= '\r') && (i < 128)) {
+  int i = 0;
+  unsigned int elapsed_time = (unsigned int) millis();	
+  while ((input != '\n') && (input!= '\r') && (i < 128) && ((millis() - elapsed_time) < 10000)) {
     if (Serial.available() > 0) {
       input = Serial.read();
       serial_string[i++] = input;