TS-450S/690S does not have PS cmd so we will disable have_ps when 1st call to PS times out for Kenwood rigs

https://github.com/Hamlib/Hamlib/issues/1114

rigs/kenwood/kenwood.c

@@ -754,6 +754,7 @@ int kenwood_init(RIG *rig)
     priv->curr_mode = 0;
     priv->micgain_min = -1;
     priv->micgain_max = -1;
+    priv->has_ps = 1;  // until proven otherwise 
 
     /* default mode_table */
     if (caps->mode_table == NULL)
@@ -812,7 +813,7 @@ int kenwood_open(RIG *rig)
         err = kenwood_get_id(rig, id);
     }
 
-    if (err == RIG_OK)   // some rigs give ID while in standby
+    if (err == RIG_OK && priv->has_ps)   // some rigs give ID while in standby
     {
         powerstat_t powerstat = 0;
         rig_debug(RIG_DEBUG_TRACE, "%s: got ID so try PS\n", __func__);
@@ -821,9 +822,14 @@ int kenwood_open(RIG *rig)
         if (err == RIG_OK && powerstat == 0 && priv->poweron == 0
                 && rig->state.auto_power_on)
         {
+            priv->has_ps = 1;
             rig_debug(RIG_DEBUG_TRACE, "%s: got PS0 so powerup\n", __func__);
             rig_set_powerstat(rig, 1);
         }
+        else if (err == -RIG_ETIMEOUT) // Some rigs like TS-450 dont' have PS cmd
+        {
+            priv->has_ps = 0;
+        }
 
         priv->poweron = 1;
 

rigs/kenwood/kenwood.h

@@ -28,7 +28,7 @@
 #include "token.h"
 #include "misc.h"
 
-#define BACKEND_VER "20220726"
+#define BACKEND_VER "20220913"
 
 #define EOM_KEN ';'
 #define EOM_TH '\r'
@@ -155,6 +155,7 @@ struct kenwood_priv_data
     struct timespec cache_start;
     char last_if_response[KENWOOD_MAX_BUF_LEN];
     int poweron;   /* to avoid powering on more than once */
+    int has_ps;    /* rig has PS cmd */
     int ag_format; /* which AG command is being used...see LEVEL_AF in kenwood.c*/
     int has_rit2; /* rig has set 2 rit command -- can set rit 0-99999 directly */
     int micgain_min, micgain_max; /* varies by rig so we figure it out automagically */