diff --git a/simulators/simelecraft.c b/simulators/simelecraft.c
index 7a9e84c47..d047474c7 100644
--- a/simulators/simelecraft.c
+++ b/simulators/simelecraft.c
@@ -70,6 +70,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simft818.c b/simulators/simft818.c
index a2bafe672..dda144558 100644
--- a/simulators/simft818.c
+++ b/simulators/simft818.c
@@ -63,6 +63,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simft991.c b/simulators/simft991.c
index d2f5b1eb2..3ce19996d 100644
--- a/simulators/simft991.c
+++ b/simulators/simft991.c
@@ -63,6 +63,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simftdx101.c b/simulators/simftdx101.c
index f12cbdaac..13adf7965 100644
--- a/simulators/simftdx101.c
+++ b/simulators/simftdx101.c
@@ -72,6 +72,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simftdx1200.c b/simulators/simftdx1200.c
index 2aa814b70..a5c948a78 100644
--- a/simulators/simftdx1200.c
+++ b/simulators/simftdx1200.c
@@ -65,6 +65,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simftdx3000.c b/simulators/simftdx3000.c
index 23a1ae999..361993dd9 100644
--- a/simulators/simftdx3000.c
+++ b/simulators/simftdx3000.c
@@ -64,6 +64,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simftdx5000.c b/simulators/simftdx5000.c
index 25450001d..a2560b4f9 100644
--- a/simulators/simftdx5000.c
+++ b/simulators/simftdx5000.c
@@ -66,6 +66,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simic7300.c b/simulators/simic7300.c
index 92f1bf481..c49d0ea68 100644
--- a/simulators/simic7300.c
+++ b/simulators/simic7300.c
@@ -72,7 +72,7 @@ again:
     while (read(fd, &c, 1) > 0)
     {
         buf[i++] = c;
-        //printf("i=%d, c=0x%02x\n",i,c);
+        printf("i=%d, c=0x%02x\n",i,c);
 
         if (c == 0xfd)
         {
@@ -141,6 +141,7 @@ void frameParse(int fd, unsigned char *frame, int len)
 
         if (powerstat)
         {
+            dump_hex(frame,11);
             n = write(fd, frame, 11);
 
             if (n <= 0) { fprintf(stderr, "%s(%d) write error %s\n", __func__, __LINE__, strerror(errno)); }
diff --git a/simulators/simkenwood.c b/simulators/simkenwood.c
index fabff7b43..12d1d8ff4 100644
--- a/simulators/simkenwood.c
+++ b/simulators/simkenwood.c
@@ -60,6 +60,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simpowersdr.c b/simulators/simpowersdr.c
index 3dedd8fb7..fac5f2456 100644
--- a/simulators/simpowersdr.c
+++ b/simulators/simpowersdr.c
@@ -61,6 +61,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simqrplabs.c b/simulators/simqrplabs.c
index 39372c75c..c33612307 100644
--- a/simulators/simqrplabs.c
+++ b/simulators/simqrplabs.c
@@ -40,6 +40,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simrotorez.c b/simulators/simrotorez.c
index 51101ae4d..fdd859ece 100644
--- a/simulators/simrotorez.c
+++ b/simulators/simrotorez.c
@@ -39,6 +39,7 @@ getmyline(int fd, char *buf)
 
         printf("\n");
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return n;
 }
diff --git a/simulators/simtmd700.c b/simulators/simtmd700.c
index e82aa49e9..67501b28b 100644
--- a/simulators/simtmd700.c
+++ b/simulators/simtmd700.c
@@ -60,6 +60,7 @@ getmyline(int fd, char *buf)
 
         buf[i++] = c;
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simtrusdx.c b/simulators/simtrusdx.c
index 5241e5a7d..211f20d6e 100644
--- a/simulators/simtrusdx.c
+++ b/simulators/simtrusdx.c
@@ -42,6 +42,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simts450.c b/simulators/simts450.c
index 08ab439bb..853db5c85 100644
--- a/simulators/simts450.c
+++ b/simulators/simts450.c
@@ -42,6 +42,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simts590.c b/simulators/simts590.c
index 699d6e266..08e444f11 100644
--- a/simulators/simts590.c
+++ b/simulators/simts590.c
@@ -48,6 +48,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simts950.c b/simulators/simts950.c
index c0296fce6..c9b9ba2ca 100644
--- a/simulators/simts950.c
+++ b/simulators/simts950.c
@@ -40,6 +40,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simts990.c b/simulators/simts990.c
index 24d265e9b..9433aaa8b 100644
--- a/simulators/simts990.c
+++ b/simulators/simts990.c
@@ -92,6 +92,7 @@ getmyline(int fd, char *buf)
         close(fd);
         fd = openPort("");
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }
diff --git a/simulators/simyaesu.c b/simulators/simyaesu.c
index 550108f89..2759930ad 100644
--- a/simulators/simyaesu.c
+++ b/simulators/simyaesu.c
@@ -69,6 +69,7 @@ getmyline(int fd, char *buf)
 
         if (c == ';') { return strlen(buf); }
     }
+    if (strlen(buf)==0) hl_usleep(10*1000);
 
     return strlen(buf);
 }