diff --git a/rigs/anytone/anytone.c b/rigs/anytone/anytone.c
index 9e359204f..0a8807249 100644
--- a/rigs/anytone/anytone.c
+++ b/rigs/anytone/anytone.c
@@ -163,15 +163,16 @@ int anytone_send(RIG  *rig,
 // ---------------------------------------------------------------------------
 // anytone_receive
 // ---------------------------------------------------------------------------
-int anytone_receive(RIG  *rig, char *buf, int buf_len, int expected)
+int anytone_receive(RIG  *rig, unsigned char *buf, int buf_len, int expected)
 {
     int               retval       = RIG_OK;
     struct rig_state *rs = &rig->state;
 
     ENTERFUNC;
 
-    retval = read_string(&rs->rigport, (unsigned char *) buf, buf_len,
-                         NULL, 0, 0, expected);
+//    retval = read_string(&rs->rigport, (unsigned char *) buf, buf_len,
+//                         NULL, 0, 0, expected);
+    retval = read_block(&rs->rigport, buf, expected);
 
     if (retval > 0)
     {
@@ -203,11 +204,11 @@ int anytone_transaction(RIG *rig, char *cmd, int cmd_len, int expected_len)
 
         if (retval == RIG_OK && expected_len != 0)
         {
-            char *buf = calloc(64, 1);
+            unsigned char *buf = calloc(64, 1);
             int len = anytone_receive(rig, buf, 64, expected_len);
             rig_debug(RIG_DEBUG_VERBOSE, "%s(%d): rx len=%d\n", __func__, __LINE__, len);
 
-            if (len == 16 && buf[0] == 0xaa && buf[1] == 0x53)
+            if (buf[0] == 0xaa && buf[1] == 0x53)
             {
                 p->vfo_curr = buf[8] == 0x00 ? RIG_VFO_A : RIG_VFO_B;
             }
@@ -346,7 +347,7 @@ int anytone_get_vfo(RIG *rig, vfo_t *vfo)
     {
         anytone_priv_data_ptr p = (anytone_priv_data_ptr) rig->state.priv;
 
-        anytone_transaction(rig, cmd, sizeof(cmd), 16);
+        anytone_transaction(rig, cmd, sizeof(cmd), 17);
 
         *vfo = p->vfo_curr;
     }
@@ -399,8 +400,8 @@ int anytone_set_vfo(RIG *rig, vfo_t vfo)
             anytone_transaction(rig, buf1, 8, 0);
             hl_usleep(100 * 1000);
             anytone_transaction(rig, buf2, 8, 0);
-            unsigned char reply[16];
-            int nbytes = read_block(&rig->state.rigport, reply, 16);
+            unsigned char reply[17];
+            int nbytes = read_block(&rig->state.rigport, reply, 17);
             rig_debug(RIG_DEBUG_ERR, "%s(%d): nbytes=%d\n", __func__, __LINE__, nbytes);
 
             if (reply[8] == 0x00) { p->vfo_curr = RIG_VFO_A; }
diff --git a/simulators/simatd578.c b/simulators/simatd578.c
index f9b977332..82b07a027 100644
--- a/simulators/simatd578.c
+++ b/simulators/simatd578.c
@@ -138,11 +138,11 @@ again:
                 n = write(fd, buf, 1);
             }
 
-            if (buf[4] == 0x0d) // set vfo
+            if (buf[4] == 0x20) // get vfo
             {
-                printf("Set VFO key1=%d, curr_vfo=%d\n", buf[2], curr_vfo);
+                printf("Get VFO curr_vfo=%d\n", curr_vfo);
 
-                if (buf[2] == 0x00)
+                if (buf[4] == 0x20)
                 {
                     if (curr_vfo == 1)
                     {
@@ -154,14 +154,14 @@ again:
                     }
                 }
 
-                printf("Set VFO key2=%d, curr_vfo=%d\n", buf[2], curr_vfo);
+                printf("Get VFO curr_vfo=%d\n", curr_vfo);
                 buf2[0] = 0xaa;
                 buf2[1] = 0x53;
                 buf2[2] = 0x00;
                 buf2[3] = 0x00;
                 buf2[4] = 0x00;
-                buf2[5] = 0x00;
-                buf2[6] = 0x00;
+                buf2[5] = 0x01;
+                buf2[6] = 0x01;
                 buf2[7] = 0x00;
                 buf2[8] = curr_vfo;
                 buf2[9] = 0x00;
@@ -170,9 +170,10 @@ again:
                 buf2[12] = 0x00;
                 buf2[13] = 0x00;
                 buf2[14] = 0x00;
-                buf2[15] = 0x06;
+                buf2[15] = 0x00;
+                buf2[16] = 0x06;
 
-                if (buf[2] == 0x00) { n = write(fd, buf2, 16); }
+                if (buf[4] == 0x20) { n = write(fd, buf2, 17); }
                 else { n = 0; }
             }