diff --git a/app.go b/app.go
index e7620f1..91fdde4 100644
--- a/app.go
+++ b/app.go
@@ -9,11 +9,21 @@ import (
 	"SatMaster/backend/flexradio"
 	"SatMaster/backend/propagator"
 	"SatMaster/backend/rotor"
+	"SatMaster/backend/skycat"
 	"SatMaster/backend/tle"
 
 	"github.com/wailsapp/wails/v2/pkg/runtime"
 )
 
+// RadioClient is the common interface for FlexRadio and SkyCAT backends.
+type RadioClient interface {
+	IsConnected() bool
+	SetFrequency(downHz, upHz float64) error
+	SetMode(mode string) error
+	ResetDeadband()
+	Disconnect()
+}
+
 // App holds all subsystems and is the Wails binding target.
 type App struct {
 	dopplerEnabled bool
@@ -23,11 +33,13 @@ type App struct {
 	trackAzimuth   bool // Track azimuth for current sat
 	savedRxSlice   int
 	savedTxSlice   int
+	radioType      string // "flex" or "skycat"
 	ctx            context.Context
 
 	tleManager  *tle.Manager
 	propagator  *propagator.Engine
 	flexRadio   *flexradio.Client
+	skyCat      *skycat.Client
 	rotorClient *rotor.PstRotatorClient
 	dopplerCalc *doppler.Calculator
 
@@ -47,9 +59,11 @@ func NewApp() *App {
 		trackAzimuth:   false,
 		savedRxSlice:   0, // defaults — overridden by SetSliceConfig from Settings on connect
 		savedTxSlice:   1,
+		radioType:      "flex",
 		tleManager:     tle.NewManager(),
 		propagator:     propagator.NewEngine(),
 		flexRadio:      flexradio.NewClient(),
+		skyCat:         skycat.NewClient(),
 		rotorClient:    rotor.NewPstRotatorClient(),
 		dopplerCalc:    doppler.NewCalculator(),
 		watchlist:      []string{"ISS (ZARYA)", "AO-7", "AO-27", "SO-50", "RS-44", "AO-91", "FO-29"},
@@ -92,9 +106,18 @@ func (a *App) startup(ctx context.Context) {
 	go a.positionLoop(ctx)
 }
 
+// activeRadio returns the currently selected radio client.
+func (a *App) activeRadio() RadioClient {
+	if a.radioType == "skycat" {
+		return a.skyCat
+	}
+	return a.flexRadio
+}
+
 func (a *App) shutdown(ctx context.Context) {
 	a.StopTracking()
 	a.flexRadio.Disconnect()
+	a.skyCat.Disconnect()
 }
 
 // positionLoop emits sat positions to frontend every second.
@@ -142,9 +165,9 @@ func (a *App) updateTracking() {
 	obs := a.propagator.ObserverPosition()
 
 	// Doppler: only when globally enabled AND tracking enabled for this sat AND el >= 0
-	if a.flexRadio.IsConnected() && pos.Elevation >= 0 && a.dopplerEnabled && a.trackFreqMode {
+	if a.activeRadio().IsConnected() && pos.Elevation >= 0 && a.dopplerEnabled && a.trackFreqMode {
 		upFreq, downFreq := a.dopplerCalc.Correct(pos, obs, now)
-		if err := a.flexRadio.SetFrequency(downFreq, upFreq); err != nil {
+		if err := a.activeRadio().SetFrequency(downFreq, upFreq); err != nil {
 			log.Printf("[Doppler] SetFrequency error: %v", err)
 		}
 	}
@@ -199,15 +222,21 @@ func (a *App) SetSatelliteFrequencies(downHz, upHz float64) {
 	a.dopplerCalc.SetNominal(downHz, upHz)
 }
 
-// SetSatelliteMode sets the FlexRadio slice mode for satellite operation.
+// SetSatelliteMode sets the radio mode for satellite operation.
 // Called automatically when a frequency is selected in the frontend.
 func (a *App) SetSatelliteMode(mode string) {
-	if !a.flexRadio.IsConnected() {
+	radio := a.activeRadio()
+	if !radio.IsConnected() {
 		return
 	}
-	flexMode := flexradio.SatModeToFlex(mode)
-	if err := a.flexRadio.SetMode(flexMode); err != nil {
-		log.Printf("[FlexRadio] SetMode error: %v", err)
+	var converted string
+	if a.radioType == "skycat" {
+		converted = skycat.SatModeToSkyCAT(mode)
+	} else {
+		converted = flexradio.SatModeToFlex(mode)
+	}
+	if err := radio.SetMode(converted); err != nil {
+		log.Printf("[Radio] SetMode error: %v", err)
 	}
 }
 
@@ -304,7 +333,7 @@ func (a *App) SetTrackFreqMode(enabled bool) {
 	a.trackFreqMode = enabled
 	// Reset dead-band so freq is sent immediately when tracking starts
 	if enabled {
-		a.flexRadio.ResetDeadband()
+		a.activeRadio().ResetDeadband()
 	}
 	log.Printf("[Doppler] Freq/Mode tracking: %v", enabled)
 }
@@ -330,11 +359,57 @@ func (a *App) GetDopplerEnabled() bool {
 	return a.dopplerEnabled
 }
 
-// GetFlexRadioStatus returns connection status.
+// GetFlexRadioStatus returns FlexRadio connection status.
 func (a *App) GetFlexRadioStatus() bool {
 	return a.flexRadio.IsConnected()
 }
 
+// SetRadioType switches between "flex" and "skycat" backends.
+func (a *App) SetRadioType(radioType string) {
+	a.radioType = radioType
+	log.Printf("[Radio] Backend switched to: %s", radioType)
+}
+
+// GetRadioType returns the current radio backend type.
+func (a *App) GetRadioType() string {
+	return a.radioType
+}
+
+// ConnectSkyCAT connects to skycatd TCP server.
+func (a *App) ConnectSkyCAT(host string, port int) string {
+	if err := a.skyCat.Connect(host, port); err != nil {
+		return "Error: " + err.Error()
+	}
+	return "OK"
+}
+
+// DisconnectSkyCAT closes the SkyCAT connection.
+func (a *App) DisconnectSkyCAT() {
+	a.skyCat.Disconnect()
+}
+
+// GetSkyCATStatus returns SkyCAT connection status.
+func (a *App) GetSkyCATStatus() bool {
+	return a.skyCat.IsConnected()
+}
+
+// SetSkyCATMode sets the SkyCAT satellite operating mode (Duplex/Split/Simplex).
+func (a *App) SetSkyCATMode(mode string) string {
+	var m skycat.SatMode
+	switch mode {
+	case "Split":
+		m = skycat.ModeSplit
+	case "Simplex":
+		m = skycat.ModeSimplex
+	default:
+		m = skycat.ModeDuplex
+	}
+	if err := a.skyCat.SetSatMode(m); err != nil {
+		return "Error: " + err.Error()
+	}
+	return "OK"
+}
+
 // GetSliceConfig returns current RX/TX slice indices.
 func (a *App) GetSliceConfig() map[string]int {
 	rx, tx := a.flexRadio.GetSlices()
diff --git a/backend/skycat/client.go b/backend/skycat/client.go
new file mode 100644
index 0000000..b1fe0d1
--- /dev/null
+++ b/backend/skycat/client.go
@@ -0,0 +1,227 @@
+package skycat
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+// SatMode defines the satellite operating mode for SkyCAT.
+type SatMode string
+
+const (
+	ModeDuplex  SatMode = "Duplex"
+	ModeSplit   SatMode = "Split"
+	ModeSimplex SatMode = "Simplex"
+)
+
+// Client manages a TCP connection to skycatd / rigctld.
+// Protocol: simple newline-terminated text commands (HamLib-compatible).
+//
+// Key commands:
+//
+//	U Duplex        — satellite duplex mode (RX≠TX)
+//	U Split         — split VFO mode
+//	U Simplex       — simplex mode
+//	F {hz}          — set RX frequency (Hz, integer)
+//	I {hz}          — set TX frequency (Hz, integer)
+//	M {mode} 0      — set RX mode (FM, USB, LSB, CW…)
+//	X {mode} 0      — set TX mode
+type Client struct {
+	mu         sync.Mutex
+	conn       net.Conn
+	reader     *bufio.Reader
+	connected  atomic.Bool
+	satMode    SatMode
+	lastDownHz float64
+	lastUpHz   float64
+}
+
+func NewClient() *Client {
+	return &Client{satMode: ModeDuplex}
+}
+
+// Connect establishes a TCP connection to skycatd (default port 4532).
+func (c *Client) Connect(host string, port int) error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	if c.connected.Load() {
+		c.disconnectLocked()
+	}
+
+	addr := fmt.Sprintf("%s:%d", host, port)
+	conn, err := net.DialTimeout("tcp", addr, 5*time.Second)
+	if err != nil {
+		return fmt.Errorf("SkyCAT connect %s: %w", addr, err)
+	}
+
+	c.conn = conn
+	c.reader = bufio.NewReader(conn)
+	c.connected.Store(true)
+
+	// Start read loop to drain responses (skycatd sends RPRT lines)
+	go c.readLoop()
+
+	// Set satellite duplex mode immediately after connect
+	log.Printf("[SkyCAT] Connected to %s", addr)
+	c.sendLocked(fmt.Sprintf("U %s", c.satMode))
+	return nil
+}
+
+// Disconnect closes the connection.
+func (c *Client) Disconnect() {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.disconnectLocked()
+}
+
+func (c *Client) disconnectLocked() {
+	if c.conn != nil {
+		c.conn.Close()
+		c.conn = nil
+	}
+	c.connected.Store(false)
+	log.Println("[SkyCAT] Disconnected")
+}
+
+// IsConnected returns true if currently connected.
+func (c *Client) IsConnected() bool {
+	return c.connected.Load()
+}
+
+// SetSatMode configures the operating mode (Duplex/Split/Simplex).
+// Sends the U command to skycatd.
+func (c *Client) SetSatMode(mode SatMode) error {
+	c.satMode = mode
+	return c.sendCommand(fmt.Sprintf("U %s", mode))
+}
+
+// SetFrequency sends corrected RX and TX frequencies to skycatd.
+// downHz = RX downlink (command F), upHz = TX uplink (command I).
+// Dead-band: 1 Hz.
+func (c *Client) SetFrequency(downHz, upHz float64) error {
+	if !c.connected.Load() {
+		return fmt.Errorf("not connected")
+	}
+
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	var errs []error
+
+	if downHz > 0 && absf(downHz-c.lastDownHz) >= 1.0 {
+		if err := c.sendLocked(fmt.Sprintf("F %.0f", downHz)); err != nil {
+			errs = append(errs, fmt.Errorf("RX freq: %w", err))
+		} else {
+			c.lastDownHz = downHz
+		}
+	}
+
+	if upHz > 0 && absf(upHz-c.lastUpHz) >= 1.0 {
+		if err := c.sendLocked(fmt.Sprintf("I %.0f", upHz)); err != nil {
+			errs = append(errs, fmt.Errorf("TX freq: %w", err))
+		} else {
+			c.lastUpHz = upHz
+		}
+	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("SkyCAT SetFrequency: %v", errs)
+	}
+	return nil
+}
+
+// SetMode sets RX and TX modes (FM, USB, LSB, CW…).
+func (c *Client) SetMode(mode string) error {
+	mode = strings.ToUpper(strings.TrimSpace(mode))
+	var errs []error
+	if err := c.sendCommand(fmt.Sprintf("M %s 0", mode)); err != nil {
+		errs = append(errs, fmt.Errorf("RX mode: %w", err))
+	}
+	if err := c.sendCommand(fmt.Sprintf("X %s 0", mode)); err != nil {
+		errs = append(errs, fmt.Errorf("TX mode: %w", err))
+	}
+	if len(errs) > 0 {
+		return fmt.Errorf("SkyCAT SetMode: %v", errs)
+	}
+	log.Printf("[SkyCAT] Mode → %s", mode)
+	return nil
+}
+
+// ResetDeadband forces next frequency command to be sent immediately.
+func (c *Client) ResetDeadband() {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.lastDownHz = 0
+	c.lastUpHz = 0
+}
+
+// SatModeToSkyCAT converts a satellite DB mode string to SkyCAT mode string.
+func SatModeToSkyCAT(satMode string) string {
+	switch strings.ToUpper(strings.TrimSpace(satMode)) {
+	case "FM", "NFM":
+		return "FM"
+	case "LSB":
+		return "LSB"
+	case "USB":
+		return "USB"
+	case "CW", "CW/DATA":
+		return "CW"
+	case "APRS", "DATA", "DIGI":
+		return "PKTLSB"
+	case "AM":
+		return "AM"
+	default:
+		return "USB"
+	}
+}
+
+func (c *Client) sendCommand(cmd string) error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return c.sendLocked(cmd)
+}
+
+// sendLocked sends a command — caller must hold c.mu.
+func (c *Client) sendLocked(cmd string) error {
+	if c.conn == nil {
+		return fmt.Errorf("not connected")
+	}
+	line := cmd + "\n"
+	c.conn.SetWriteDeadline(time.Now().Add(2 * time.Second))
+	_, err := fmt.Fprint(c.conn, line)
+	if err != nil {
+		c.connected.Store(false)
+		return fmt.Errorf("send: %w", err)
+	}
+	log.Printf("[SkyCAT] → %s", strings.TrimSpace(line))
+	return nil
+}
+
+// readLoop drains responses from skycatd (RPRT 0 = OK, RPRT -1 = error).
+func (c *Client) readLoop() {
+	for {
+		line, err := c.reader.ReadString('\n')
+		if err != nil {
+			if c.connected.Load() {
+				log.Printf("[SkyCAT] Read error: %v", err)
+				c.connected.Store(false)
+			}
+			return
+		}
+		log.Printf("[SkyCAT] ← %s", strings.TrimSpace(line))
+	}
+}
+
+func absf(x float64) float64 {
+	if x < 0 {
+		return -x
+	}
+	return x
+}
diff --git a/build/bin/SatMaster.exe b/build/bin/SatMaster.exe
index 4e5ec16..e13f30f 100644
Binary files a/build/bin/SatMaster.exe and b/build/bin/SatMaster.exe differ
diff --git a/frontend/src/App.svelte b/frontend/src/App.svelte
index 61c7f3d..0b9fc91 100644
--- a/frontend/src/App.svelte
+++ b/frontend/src/App.svelte
@@ -8,7 +8,7 @@
   import PolarPlot from './components/PolarPlot.svelte'
   import { Go, onWailsEvent } from './lib/wails.js'
   import { get } from 'svelte/store'
-  import { satPositions, satList, trackedSat, trackedPosition, passes, tleAge, tleLoaded, flexConnected, rotorConnected, settings, watchlist, soundEnabled, passesAllCache } from './stores/satstore.js'
+  import { satPositions, satList, trackedSat, trackedPosition, passes, tleAge, tleLoaded, flexConnected, rotorConnected, skycatConnected, settings, watchlist, soundEnabled, passesAllCache } from './stores/satstore.js'
 
   let activeTab = 'map'
   let cleanups = []
@@ -43,6 +43,15 @@
         await Go.SetRotorAzOnly(s.rotorAzOnly ?? true)
       }
     }
+    if (s.autoConnectSkycat && s.radioType === 'skycat') {
+      const res = await Go.ConnectSkyCAT(s.skycatHost, s.skycatPort)
+      if (res === 'OK') {
+        skycatConnected.set(true)
+        await Go.SetSkyCATMode(s.skycatSatMode || 'Duplex')
+      }
+    }
+    // Sync radio type to backend on startup
+    if (s.radioType) await Go.SetRadioType(s.radioType)
 
     const names = await Go.GetSatelliteList()
     if (names) satList.set(names)
diff --git a/frontend/src/components/SettingsPanel.svelte b/frontend/src/components/SettingsPanel.svelte
index ca6f1c4..c7d76ef 100644
--- a/frontend/src/components/SettingsPanel.svelte
+++ b/frontend/src/components/SettingsPanel.svelte
@@ -1,5 +1,5 @@
 <script>
-  import { settings, flexConnected, rotorConnected, soundEnabled } from '../stores/satstore.js'
+  import { settings, flexConnected, rotorConnected, soundEnabled, skycatConnected } from '../stores/satstore.js'
   import { Go } from '../lib/wails.js'
   import { maidenheadToLatLon, latLonToMaidenhead } from '../lib/maidenhead.js'
 
@@ -16,6 +16,8 @@
   let availableVoices = []
   let selectedVoiceName = ''
 
+  let skycatStatus = ''
+
   // Load slice config on mount
   import { onMount } from 'svelte'
   onMount(async () => {
@@ -48,6 +50,28 @@
     flexStatus = `Slices: RX=Slice ${'ABCDEFGH'[rxSlice]}, TX=Slice ${'ABCDEFGH'[txSlice]}`
   }
 
+  async function connectSkycat() {
+    skycatStatus = 'Connecting…'
+    settings.update(s => ({ ...s, skycatHost: local.skycatHost, skycatPort: local.skycatPort, skycatSatMode: local.skycatSatMode }))
+    const res = await Go.ConnectSkyCAT(local.skycatHost, local.skycatPort)
+    if (res === 'OK') {
+      skycatConnected.set(true)
+      skycatStatus = 'Connected ✓'
+      await Go.SetSkyCATMode(local.skycatSatMode || 'Duplex')
+    } else { skycatStatus = res || 'Error' }
+  }
+
+  async function disconnectSkycat() {
+    await Go.DisconnectSkyCAT()
+    skycatConnected.set(false)
+    skycatStatus = 'Disconnected'
+  }
+
+  async function saveRadioType() {
+    settings.update(s => ({ ...s, radioType: local.radioType }))
+    await Go.SetRadioType(local.radioType)
+  }
+
   function saveVoice() {
     settings.update(s => ({ ...s, ttsVoiceName: selectedVoiceName }))
   }
@@ -163,6 +187,58 @@
       </button>
     </section>
 
+    <!-- Radio Backend Selector -->
+    <section class="card">
+      <h3>📻 Radio Backend</h3>
+      <div class="fg">
+        <label>Active backend</label>
+        <select bind:value={local.radioType} on:change={saveRadioType}>
+          <option value="flex">FlexRadio 8600 (direct TCP)</option>
+          <option value="skycat">SkyCAT / rigctld (universal)</option>
+        </select>
+      </div>
+      <p class="hint">
+        {#if local.radioType === 'skycat'}
+          SkyCAT mode: connect skycatd.exe or rigctld.exe for your radio, then connect below.
+        {:else}
+          FlexRadio mode: direct TCP connection to SmartSDR API port 4992.
+        {/if}
+      </p>
+    </section>
+
+    <!-- SkyCAT -->
+    {#if local.radioType === 'skycat'}
+    <section class="card">
+      <div class="card-head">
+        <h3>🛰 SkyCAT / rigctld</h3>
+        <span class="badge {$skycatConnected ? 'ok' : 'off'}">{$skycatConnected ? 'CONNECTED' : 'OFFLINE'}</span>
+      </div>
+      <div class="fg">
+        <label>Host / IP</label>
+        <input type="text" bind:value={local.skycatHost} placeholder="127.0.0.1" />
+        <label>TCP Port</label>
+        <input type="number" bind:value={local.skycatPort} placeholder="4532" />
+        <label>Sat Mode</label>
+        <select bind:value={local.skycatSatMode}>
+          <option value="Duplex">Duplex (RX≠TX freq)</option>
+          <option value="Split">Split VFO</option>
+          <option value="Simplex">Simplex</option>
+        </select>
+      </div>
+      <div class="btn-row">
+        {#if $skycatConnected}
+          <button class="btn-danger" on:click={disconnectSkycat}>Disconnect</button>
+        {:else}
+          <button class="btn-primary" on:click={connectSkycat}>Connect</button>
+        {/if}
+        {#if skycatStatus}
+          <span class="status {skycatStatus.includes('✓') ? 'ok-txt' : 'err-txt'}">{skycatStatus}</span>
+        {/if}
+      </div>
+      <p class="hint">Start skycatd.exe first: <code>skycatd -m IC-9700 -r COM9 -t 4532</code></p>
+    </section>
+    {/if}
+
     <!-- FlexRadio -->
     <section class="card">
       <div class="card-head">
@@ -308,7 +384,7 @@
     <!-- About -->
     <section class="card">
       <h3>ℹ️ About</h3>
-      <p><strong>SatMaster v1.0</strong> — F4BPO</p>
+      <p><strong>SatMaster v0.2</strong> — F4BPO</p>
       <p>Amateur satellite tracking · FlexRadio Doppler correction · PstRotator control</p>
       <p class="hint">SGP4 via akhenakh/sgp4 · Go + Wails + Svelte</p>
     </section>
diff --git a/frontend/src/components/StatusBar.svelte b/frontend/src/components/StatusBar.svelte
index 819ca33..8ea21b6 100644
--- a/frontend/src/components/StatusBar.svelte
+++ b/frontend/src/components/StatusBar.svelte
@@ -1,5 +1,5 @@
 <script>
-  import { trackedSat, trackedPosition, flexConnected, rotorConnected, tleAge, settings, dopplerEnabled, rotorEnabled, soundEnabled } from '../stores/satstore.js'
+  import { trackedSat, trackedPosition, flexConnected, rotorConnected, skycatConnected, tleAge, settings, dopplerEnabled, rotorEnabled, soundEnabled } from '../stores/satstore.js'
   import { formatFreq, formatShift, formatRange, computeDopplerShift } from '../lib/utils.js'
   import { onMount, onDestroy } from 'svelte'
 
@@ -58,7 +58,7 @@
       </div>
     {/if}
 
-    {#if $flexConnected}
+    {#if ($settings.radioType === 'skycat' && $skycatConnected) || ($settings.radioType !== 'skycat' && $flexConnected)}
       <button class="doppler-toggle {$dopplerEnabled ? 'don' : 'doff'}" on:click={() => dopplerEnabled.update(v => !v)} title={$dopplerEnabled ? 'Doppler ON — click to disable' : 'Doppler OFF — click to enable'}>
         <span>⟳ DOPPLER {$dopplerEnabled ? 'ON' : 'OFF'}</span>
       </button>
@@ -72,10 +72,17 @@
       <span>🔊 SOUND {$soundEnabled ? 'ON' : 'OFF'}</span>
     </button>
     <div class="conn-group">
-      <div class="conn {$flexConnected ? 'on' : 'off'}">
-        <span class="conn-dot"></span>
-        <span>FLEX</span>
-      </div>
+      {#if $settings.radioType === 'skycat'}
+        <div class="conn {$skycatConnected ? 'on' : 'off'}">
+          <span class="conn-dot"></span>
+          <span>SKYCAT</span>
+        </div>
+      {:else}
+        <div class="conn {$flexConnected ? 'on' : 'off'}">
+          <span class="conn-dot"></span>
+          <span>FLEX</span>
+        </div>
+      {/if}
       <div class="conn {$rotorConnected ? 'on' : 'off'}">
         <span class="conn-dot"></span>
         <span>ROTOR</span>
diff --git a/frontend/src/lib/wails.js b/frontend/src/lib/wails.js
index 6bdcdc2..7c1f508 100644
--- a/frontend/src/lib/wails.js
+++ b/frontend/src/lib/wails.js
@@ -51,6 +51,12 @@ export const Go = {
   SetSatelliteMode: (mode) => wailsCall('main.App.SetSatelliteMode', mode),
   SetTrackFreqMode: (v) => wailsCall('main.App.SetTrackFreqMode', v),
   SetTrackAzimuth: (v) => wailsCall('main.App.SetTrackAzimuth', v),
+  // SkyCAT / rigctld
+  ConnectSkyCAT: (host, port) => wailsCall('main.App.ConnectSkyCAT', host, port),
+  DisconnectSkyCAT: () => wailsCall('main.App.DisconnectSkyCAT'),
+  GetSkyCATStatus: () => wailsCall('main.App.GetSkyCATStatus'),
+  SetRadioType: (type) => wailsCall('main.App.SetRadioType', type),
+  SetSkyCATMode: (mode) => wailsCall('main.App.SetSkyCATMode', mode),
 }
 
 // Wails event listener wrapper
diff --git a/frontend/src/stores/satstore.js b/frontend/src/stores/satstore.js
index d778bab..03548a4 100644
--- a/frontend/src/stores/satstore.js
+++ b/frontend/src/stores/satstore.js
@@ -35,6 +35,7 @@ trackedSat.subscribe(name => {
 
 // Connection states
 export const flexConnected = writable(false)
+export const skycatConnected = writable(false)
 export const dopplerEnabled = writable(true)
 
 // Passes panel state — persisted in memory so tab switches don't reset filters
@@ -55,22 +56,27 @@ const DEFAULT_SETTINGS = {
   qthLat: 48.7,
   qthLon: 2.55,
   qthAlt: 100,
+  radioType: 'flex',           // 'flex' | 'skycat'
   flexHost: '192.168.1.100',
   flexPort: 4992,
+  skycatHost: '127.0.0.1',
+  skycatPort: 4532,
+  skycatSatMode: 'Duplex',     // 'Duplex' | 'Split' | 'Simplex'
+  autoConnectSkycat: false,
   rotorHost: '127.0.0.1',
   rotorPort: 12000,
-  rotorAzOnly: true,  // true = azimuth only, false = az+el
+  rotorAzOnly: true,
   downlinkHz: 145800000,
   uplinkHz: 145200000,
   minElFilter: 5,
   autoConnectFlex: false,
   autoConnectRotor: false,
-  rxSlice: 0,  // Slice A = RX downlink
-  txSlice: 1,  // Slice B = TX uplink
+  rxSlice: 0,
+  txSlice: 1,
 }
 
 // Settings version — bump this to force reset of specific fields
-const SETTINGS_VERSION = 3
+const SETTINGS_VERSION = 4
 
 // Load persisted settings from localStorage
 function loadSettings() {
@@ -85,6 +91,10 @@ function loadSettings() {
           ...parsed,
           rxSlice: DEFAULT_SETTINGS.rxSlice,
           txSlice: DEFAULT_SETTINGS.txSlice,
+          radioType: DEFAULT_SETTINGS.radioType,
+          skycatHost: DEFAULT_SETTINGS.skycatHost,
+          skycatPort: DEFAULT_SETTINGS.skycatPort,
+          skycatSatMode: DEFAULT_SETTINGS.skycatSatMode,
           _version: SETTINGS_VERSION,
         }
       }