feat: While using Flex & Steppir or Ultrabeam can prevent transmit when antenna is moving

internal/cat/cat.go

@@ -352,6 +352,7 @@ type FlexController interface {
 	SetRFPower(int) error
 	SetTunePower(int) error
 	SetTune(bool) error
+	SetTXInhibit(bool) error
 	SetVOX(bool) error
 	SetVOXLevel(int) error
 	SetVOXDelay(int) error

internal/cat/flex.go

@@ -109,6 +109,7 @@ type flexTX struct {
 	tunePower    int
 	tune         bool
 	transmitting bool // interlock state == TRANSMITTING
+	inhibit      bool // transmit inhibited (e.g. while a motorized antenna moves)
 	voxEnable    bool
 	voxLevel     int
 	voxDelay     int
@@ -1708,6 +1709,14 @@ func (f *Flex) SetTune(on bool) error {
 	return f.txSet(cmd, "tune", func(t *flexTX) { t.tune = on })
 }
 
+// SetTXInhibit blocks (on=true) or allows transmission at the radio. Used to keep
+// the operator from keying while a motorized antenna's elements are moving —
+// SmartSDR refuses to transmit while inhibit is set, so it holds even against a
+// footswitch or an external keyer, which a software PTT block could not.
+func (f *Flex) SetTXInhibit(on bool) error {
+	return f.txSet("transmit set inhibit="+boolFlex(on), "inhibit", func(t *flexTX) { t.inhibit = on })
+}
+
 func (f *Flex) SetVOX(on bool) error {
 	return f.txSet("transmit set vox_enable="+boolFlex(on), "vox_enable", func(t *flexTX) { t.voxEnable = on })
 }

internal/cat/icomnet.go

@@ -286,19 +286,33 @@ func (n *icomNet) ctrlPump() {
 			switch icnLE.Uint16(buf[4:]) {
 			case 0x07: // ping
 				_, _ = n.ctrl.Write(icnPingReply(buf[:k], n.cID, n.cRemote))
+			case 0x00: // idle keepalive from the rig — nothing to do
 			case 0x01: // retransmit request — resend from the CONTROL sent-buffer
 				if k >= 8 {
 					n.ctrlResend(icnLE.Uint16(buf[6:]))
 				}
 			case 0x05: // rig-initiated disconnect — it dropped US
 				debugLog.Printf("icom net: rig sent DISCONNECT on control stream — session dropped by the rig")
+			default:
+				// Anything else on the control stream is (almost always) the rig's
+				// reply to our token renewal. Log it: a 0x40-length token packet
+				// carries a result code, and if the rig is REJECTING renewals this is
+				// where the ~2-3 min disconnect originates. The hex makes the cause
+				// visible in the friend's log without a protocol analyzer.
+				if k >= 0x18 {
+					debugLog.Printf("icom net: control reply len=%d head=% X", k, buf[:0x18])
+				} else {
+					debugLog.Printf("icom net: control reply len=%d head=% X", k, buf[:k])
+				}
 			}
 		}
 		if time.Since(lastIdle) > 100*time.Millisecond {
 			_, _ = n.ctrl.Write(icnCtrl(0x00, 0, n.cID, n.cRemote))
 			lastIdle = time.Now()
 		}
-		if time.Since(lastToken) > 45*time.Second {
+		// Renew well inside the rig's ~2-min token timeout. 30 s (was 45) leaves room
+		// for one lost renewal + its retransmit before the token would lapse.
+		if time.Since(lastToken) > 30*time.Second {
 			n.renewToken()
 			lastToken = time.Now()
 		}

internal/cat/icomserial.go

@@ -283,6 +283,7 @@ func (b *IcomSerial) ReadState() (RigState, error) {
 				b.dspMu.Unlock()
 				return s, nil
 			}
+			debugLog.Printf("icom net: control link went quiet (no rig packets for >6 s) → reconnecting. If this recurs every ~2-3 min, the rig is invalidating the session (token renewal rejected).")
 			return RigState{}, err // control link dead → let the Manager reconnect
 		}
 		// USB (no liveness signal): the rig briefly stops answering CI-V while it