diff --git a/app.go b/app.go index 4ce112a..11d9616 100644 --- a/app.go +++ b/app.go @@ -11397,14 +11397,28 @@ func boolStr(b bool) string { // StationDevice is one configured relay board for the Station Control tab. type StationDevice struct { ID string `json:"id"` - Type string `json:"type"` // "webswitch" | "kmtronic" | "denkovi" + Type string `json:"type"` // "webswitch" | "kmtronic" | "denkovi" | "usbrelay" Name string `json:"name"` - Host string `json:"host"` + Host string `json:"host"` // IP for network boards; FTDI serial for denkovi; COM port for usbrelay User string `json:"user,omitempty"` // KMTronic HTTP auth (blank = none) Pass string `json:"pass,omitempty"` + Channels int `json:"channels,omitempty"` // usbrelay only: number of relays (1/2/4/8/16) Labels []string `json:"labels"` // per-relay label (index 0 = relay 1) } +// deviceRelayCount is the relay count for a configured device — fixed by type, +// except the Denkovi (4 or 8) and the generic USB-serial board, whose channel +// count the user picks. +func deviceRelayCount(d StationDevice) int { + if d.Type == "usbrelay" || d.Type == "denkovi" { + if d.Channels >= 1 { + return d.Channels + } + return 8 + } + return relayCountFor(d.Type) +} + // relayCountFor returns a device type's fixed relay count. func relayCountFor(typ string) int { switch typ { @@ -11422,7 +11436,10 @@ func deviceDriver(d StationDevice) relaydev.Device { return relaydev.NewKMTronic(d.Host, d.User, d.Pass) case "denkovi": // Host carries the FTDI serial number (e.g. "DAE0006K"), not a hostname. - return relaydev.NewDenkovi(d.Host) + return relaydev.NewDenkovi(d.Host, deviceRelayCount(d)) + case "usbrelay": + // Host carries the COM port (e.g. "COM5"); CH340/LCUS "A0" serial protocol. + return relaydev.NewSerialRelay(d.Host, deviceRelayCount(d)) default: return relaydev.NewWebswitch(d.Host) } @@ -11458,7 +11475,7 @@ func (a *App) SaveStationDevices(devs []StationDevice) error { } for i := range devs { switch devs[i].Type { - case "kmtronic", "denkovi", "webswitch": + case "kmtronic", "denkovi", "usbrelay", "webswitch": // known type — keep default: devs[i].Type = "webswitch" @@ -11466,7 +11483,7 @@ func (a *App) SaveStationDevices(devs []StationDevice) error { if strings.TrimSpace(devs[i].ID) == "" { devs[i].ID = fmt.Sprintf("dev%d-%d", i, time.Now().UnixNano()) } - n := relayCountFor(devs[i].Type) + n := deviceRelayCount(devs[i]) for len(devs[i].Labels) < n { devs[i].Labels = append(devs[i].Labels, "") } @@ -11507,7 +11524,7 @@ func (a *App) GetStationStatus() []StationDeviceStatus { go func(i int) { defer wg.Done() d := devs[i] - n := relayCountFor(d.Type) + n := deviceRelayCount(d) ds := StationDeviceStatus{ID: d.ID, Name: d.Name, Type: d.Type} ctx, cancel := context.WithTimeout(a.ctx, 6*time.Second) defer cancel() diff --git a/frontend/src/components/SettingsModal.tsx b/frontend/src/components/SettingsModal.tsx index ba42097..ac3b3cb 100644 --- a/frontend/src/components/SettingsModal.tsx +++ b/frontend/src/components/SettingsModal.tsx @@ -698,7 +698,7 @@ function RelayAutoPanel() {
{dev.name || dev.id}
- {Array.from({ length: relayCountUI(dev.type) }, (_, i) => i + 1).map((relay) => { + {Array.from({ length: (dev.labels?.length || relayCountUI(dev.type)) }, (_, i) => i + 1).map((relay) => { const r = ruleFor(dev.id, relay); const label = (dev.labels?.[relay - 1] || '').trim() || `${t('relayauto.relay')} ${relay}`; return ( diff --git a/frontend/src/components/StationControlPanel.tsx b/frontend/src/components/StationControlPanel.tsx index b12ed95..1fa5147 100644 --- a/frontend/src/components/StationControlPanel.tsx +++ b/frontend/src/components/StationControlPanel.tsx @@ -12,17 +12,22 @@ import { GetStationDevices, SaveStationDevices, GetStationStatus, StationSetRelay, GetRotatorHeading, RotatorGoTo, RotatorStop, GetUltrabeamStatus, SetUltrabeamDirection, UltrabeamRetract, MotorSetElement, MotorReadElements, - ListDenkoviDevices, + ListDenkoviDevices, ListSerialPorts, } from '../../wailsjs/go/main/App'; type RotatorProps = { centerLat?: number | null; centerLon?: number | null; bearing?: number | null }; -type Device = { id: string; type: string; name: string; host: string; user?: string; pass?: string; labels: string[] }; +type Device = { id: string; type: string; name: string; host: string; user?: string; pass?: string; channels?: number; labels: string[] }; type Relay = { number: number; label: string; on: boolean }; type DevStatus = { id: string; name: string; type: string; connected: boolean; error?: string; relays: Relay[] }; -const RELAY_COUNT: Record = { webswitch: 5, kmtronic: 8, denkovi: 8 }; -const TYPE_LABEL: Record = { webswitch: 'WebSwitch 1216H', kmtronic: 'KMTronic 8-relay', denkovi: 'Denkovi USB 8-relay' }; +const RELAY_COUNT: Record = { webswitch: 5, kmtronic: 8, denkovi: 8, usbrelay: 8 }; +const TYPE_LABEL: Record = { webswitch: 'WebSwitch 1216H', kmtronic: 'KMTronic 8-relay', denkovi: 'Denkovi USB relay', usbrelay: 'USB serial relay' }; + +// Relay count for a configured device: fixed by type, except Denkovi (4/8) and +// the generic USB-serial board, whose channel count the user picks. +const chanCount = (d: Device): number => + (d.type === 'denkovi' || d.type === 'usbrelay') ? (d.channels && d.channels >= 1 ? d.channels : 8) : (RELAY_COUNT[d.type] ?? 5); function blankDevice(): Device { return { id: '', type: 'webswitch', name: '', host: '', user: '', pass: '', labels: Array(5).fill('') }; @@ -446,12 +451,25 @@ function DeviceEditor({ device, onChange, onSave, onCancel, t }: { const ref = useRef(null); useEffect(() => { ref.current?.scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }, []); const setType = (type: string) => { - const n = RELAY_COUNT[type] ?? 5; + const channels = (type === 'denkovi' || type === 'usbrelay') ? (device.channels || 8) : undefined; + const n = chanCount({ ...device, type, channels }); const labels = Array.from({ length: n }, (_, i) => device.labels[i] ?? ''); - onChange({ ...device, type, labels }); + onChange({ ...device, type, channels, labels }); + }; + const setChannels = (channels: number) => { + const n = chanCount({ ...device, channels }); + const labels = Array.from({ length: n }, (_, i) => device.labels[i] ?? ''); + onChange({ ...device, channels, labels }); }; const isKM = device.type === 'kmtronic'; const isDenkovi = device.type === 'denkovi'; + const isUsbRelay = device.type === 'usbrelay'; + // COM ports for the generic USB-serial relay picker. + const [serialPorts, setSerialPorts] = useState([]); + useEffect(() => { + if (!isUsbRelay) return; + ListSerialPorts().then((p) => setSerialPorts((p ?? []) as string[])).catch(() => setSerialPorts([])); + }, [isUsbRelay]); // Detected FTDI serials for the Denkovi picker. const [denkoviSerials, setDenkoviSerials] = useState([]); const [detecting, setDetecting] = useState(false); @@ -477,7 +495,8 @@ function DeviceEditor({ device, onChange, onSave, onCancel, t }: { WebSwitch 1216H (5 relays) KMTronic 8-relay (LAN) - Denkovi USB 8-relay (FT245) + Denkovi USB relay (FT245, 4/8) + USB serial relay (CH340/LCUS)
@@ -486,6 +505,19 @@ function DeviceEditor({ device, onChange, onSave, onCancel, t }: { onChange({ ...device, name: e.target.value })} />
+ {(isDenkovi || isUsbRelay) && ( +
+ + +
+ )} {isDenkovi ? (
@@ -503,6 +535,23 @@ function DeviceEditor({ device, onChange, onSave, onCancel, t }: {

{t('station.ftdiHint')}

+ ) : isUsbRelay ? ( +
+ +
+ + +
+

{t('station.usbRelayHint')}

+
) : (
diff --git a/frontend/src/lib/i18n.tsx b/frontend/src/lib/i18n.tsx index 272991d..2438574 100644 --- a/frontend/src/lib/i18n.tsx +++ b/frontend/src/lib/i18n.tsx @@ -131,7 +131,7 @@ const en: Dict = { 'uscty.backfillIntro': 'Resolve county (and grid) for US QSOs already in your log that are missing them. Existing values are kept — only blanks are filled.', 'uscty.backfillRun': 'Fill missing counties', 'uscty.backfillDone': '{s} US QSOs scanned · {c} counties, {g} grids filled.', - 'station.title': 'Station Control', 'station.rotator': 'Rotator', 'station.rotatorNoRead': 'No heading read', 'station.pattern': 'Pattern', 'station.bi': 'Bi', 'station.retract': 'Retract elements', 'station.moving': 'MOVING', 'station.elements': 'Elements (mm)', 'station.read': 'Read', 'station.readLengths': 'Read current element lengths from the controller', 'station.noLengths': 'Lengths unknown — click Read to fetch them from the controller.', 'station.element': 'Element', 'station.reflector': 'Reflector', 'station.driven': 'Driven', 'station.director': 'Dir', 'station.set': 'Set', 'station.elementsHint': 'Each press lengthens/shortens the element by 2 mm (like the physical console). Verify which element responds on your antenna.', 'station.setExactLen': 'Click to type the exact current length (fixes the baseline if the auto-read is off).', 'station.atMax': 'Controller refused — the element is likely at its maximum length for this band, so it can\'t extend further.', 'station.go': 'Go', 'station.stop': 'Stop', 'station.dragHint': 'Drag a widget by its card to reorder. Pick a column count to lay them out in a grid.', 'station.colsAuto': 'Auto', 'station.addDevice': 'Add device', 'station.editDevice': 'Edit device', 'station.empty': 'No relay boards yet. Add a WebSwitch 1216H or a KMTronic 8-relay board to control your station power and accessories.', 'station.online': 'Online', 'station.offline': 'Offline', 'station.edit': 'Edit', 'station.delete': 'Delete', 'station.relay': 'Relay', 'station.on': 'ON', 'station.off': 'OFF', 'station.type': 'Device type', 'station.name': 'Name', 'station.host': 'Host / IP', 'station.user': 'Username', 'station.pass': 'Password', 'station.optional': 'optional', 'station.ftdiSerial': 'FTDI serial number', 'station.detect': 'Detect', 'station.ftdiHint': 'The Denkovi board is driven via FTDI bit-bang (not the COM port). Pick its serial (e.g. DAE0006K). Needs the FTDI D2XX driver installed.', 'station.labels': 'Relay labels', 'station.cancel': 'Cancel', 'station.save': 'Save', + 'station.title': 'Station Control', 'station.rotator': 'Rotator', 'station.rotatorNoRead': 'No heading read', 'station.pattern': 'Pattern', 'station.bi': 'Bi', 'station.retract': 'Retract elements', 'station.moving': 'MOVING', 'station.elements': 'Elements (mm)', 'station.read': 'Read', 'station.readLengths': 'Read current element lengths from the controller', 'station.noLengths': 'Lengths unknown — click Read to fetch them from the controller.', 'station.element': 'Element', 'station.reflector': 'Reflector', 'station.driven': 'Driven', 'station.director': 'Dir', 'station.set': 'Set', 'station.elementsHint': 'Each press lengthens/shortens the element by 2 mm (like the physical console). Verify which element responds on your antenna.', 'station.setExactLen': 'Click to type the exact current length (fixes the baseline if the auto-read is off).', 'station.atMax': 'Controller refused — the element is likely at its maximum length for this band, so it can\'t extend further.', 'station.go': 'Go', 'station.stop': 'Stop', 'station.dragHint': 'Drag a widget by its card to reorder. Pick a column count to lay them out in a grid.', 'station.colsAuto': 'Auto', 'station.addDevice': 'Add device', 'station.editDevice': 'Edit device', 'station.empty': 'No relay boards yet. Add a WebSwitch 1216H or a KMTronic 8-relay board to control your station power and accessories.', 'station.online': 'Online', 'station.offline': 'Offline', 'station.edit': 'Edit', 'station.delete': 'Delete', 'station.relay': 'Relay', 'station.on': 'ON', 'station.off': 'OFF', 'station.type': 'Device type', 'station.name': 'Name', 'station.host': 'Host / IP', 'station.user': 'Username', 'station.pass': 'Password', 'station.optional': 'optional', 'station.ftdiSerial': 'FTDI serial number', 'station.detect': 'Detect', 'station.ftdiHint': 'The Denkovi board is driven via FTDI bit-bang (not the COM port). Pick its serial (e.g. DAE0006K). Needs the FTDI D2XX driver installed.', 'station.channels': 'Relays', 'station.comPort': 'COM port', 'station.noPorts': 'No ports found', 'station.usbRelayHint': 'Cheap USB-serial relay boards (CH340/LCUS) using the A0 command protocol. If yours does not switch, tell me its model / command set.', 'station.labels': 'Relay labels', 'station.cancel': 'Cancel', 'station.save': 'Save', 'sec.awards': 'Awards', 'sec.cat': 'CAT interface', 'sec.rotator': 'Rotator', 'sec.winkeyer': 'CW Keyer', 'sec.antenna': 'Ultrabeam / Steppir', 'sec.antgenius': 'Antenna Genius', 'sec.pgxl': 'Power Genius', 'sec.flex': 'FlexRadio', 'sec.audio': 'Audio devices', 'sec.relayauto': 'Relay auto-control', @@ -444,7 +444,7 @@ const fr: Dict = { 'uscty.backfillIntro': "Résout le comté (et le locator) pour les QSO US déjà dans ton log qui n'en ont pas. Les valeurs existantes sont conservées — seuls les vides sont remplis.", 'uscty.backfillRun': 'Remplir les comtés manquants', 'uscty.backfillDone': '{s} QSO US analysés · {c} comtés, {g} locators remplis.', - 'station.title': 'Contrôle station', 'station.rotator': 'Rotator', 'station.rotatorNoRead': 'Azimut non lu', 'station.pattern': 'Diagramme', 'station.bi': 'Bi', 'station.retract': 'Rétracter les éléments', 'station.moving': 'EN MOUVEMENT', 'station.elements': 'Éléments (mm)', 'station.read': 'Lire', 'station.readLengths': 'Lire les longueurs actuelles depuis le contrôleur', 'station.noLengths': 'Longueurs inconnues — clique sur Lire pour les récupérer depuis le contrôleur.', 'station.element': 'Élément', 'station.reflector': 'Réflecteur', 'station.driven': 'Radiateur', 'station.director': 'Dir', 'station.set': 'Régler', 'station.elementsHint': "Chaque appui allonge/raccourcit l'élément de 2 mm (comme le pupitre). Vérifie quel élément répond sur ton antenne.", 'station.setExactLen': "Clique pour taper la longueur actuelle exacte (recale la base si la lecture auto est fausse).", 'station.atMax': "Refusé par le contrôleur — l'élément est probablement en butée (longueur max pour cette bande), il ne peut plus s'allonger.", 'station.go': 'Aller', 'station.stop': 'Stop', 'station.dragHint': 'Glisse une carte pour réordonner. Choisis un nombre de colonnes pour la disposition.', 'station.colsAuto': 'Auto', 'station.addDevice': 'Ajouter un appareil', 'station.editDevice': "Modifier l'appareil", 'station.empty': "Aucune carte relais. Ajoute un WebSwitch 1216H ou une carte KMTronic 8 relais pour piloter l'alimentation et les accessoires de ta station.", 'station.online': 'En ligne', 'station.offline': 'Hors ligne', 'station.edit': 'Modifier', 'station.delete': 'Supprimer', 'station.relay': 'Relais', 'station.on': 'ON', 'station.off': 'OFF', 'station.type': "Type d'appareil", 'station.name': 'Nom', 'station.host': 'Hôte / IP', 'station.user': "Nom d'utilisateur", 'station.pass': 'Mot de passe', 'station.optional': 'optionnel', 'station.ftdiSerial': 'Numéro de série FTDI', 'station.detect': 'Détecter', 'station.ftdiHint': "La carte Denkovi se pilote en FTDI bit-bang (pas via le port COM). Choisis son numéro de série (ex. DAE0006K). Nécessite le driver FTDI D2XX installé.", 'station.labels': 'Libellés des relais', 'station.cancel': 'Annuler', 'station.save': 'Enregistrer', + 'station.title': 'Contrôle station', 'station.rotator': 'Rotator', 'station.rotatorNoRead': 'Azimut non lu', 'station.pattern': 'Diagramme', 'station.bi': 'Bi', 'station.retract': 'Rétracter les éléments', 'station.moving': 'EN MOUVEMENT', 'station.elements': 'Éléments (mm)', 'station.read': 'Lire', 'station.readLengths': 'Lire les longueurs actuelles depuis le contrôleur', 'station.noLengths': 'Longueurs inconnues — clique sur Lire pour les récupérer depuis le contrôleur.', 'station.element': 'Élément', 'station.reflector': 'Réflecteur', 'station.driven': 'Radiateur', 'station.director': 'Dir', 'station.set': 'Régler', 'station.elementsHint': "Chaque appui allonge/raccourcit l'élément de 2 mm (comme le pupitre). Vérifie quel élément répond sur ton antenne.", 'station.setExactLen': "Clique pour taper la longueur actuelle exacte (recale la base si la lecture auto est fausse).", 'station.atMax': "Refusé par le contrôleur — l'élément est probablement en butée (longueur max pour cette bande), il ne peut plus s'allonger.", 'station.go': 'Aller', 'station.stop': 'Stop', 'station.dragHint': 'Glisse une carte pour réordonner. Choisis un nombre de colonnes pour la disposition.', 'station.colsAuto': 'Auto', 'station.addDevice': 'Ajouter un appareil', 'station.editDevice': "Modifier l'appareil", 'station.empty': "Aucune carte relais. Ajoute un WebSwitch 1216H ou une carte KMTronic 8 relais pour piloter l'alimentation et les accessoires de ta station.", 'station.online': 'En ligne', 'station.offline': 'Hors ligne', 'station.edit': 'Modifier', 'station.delete': 'Supprimer', 'station.relay': 'Relais', 'station.on': 'ON', 'station.off': 'OFF', 'station.type': "Type d'appareil", 'station.name': 'Nom', 'station.host': 'Hôte / IP', 'station.user': "Nom d'utilisateur", 'station.pass': 'Mot de passe', 'station.optional': 'optionnel', 'station.ftdiSerial': 'Numéro de série FTDI', 'station.detect': 'Détecter', 'station.ftdiHint': "La carte Denkovi se pilote en FTDI bit-bang (pas via le port COM). Choisis son numéro de série (ex. DAE0006K). Nécessite le driver FTDI D2XX installé.", 'station.channels': 'Relais', 'station.comPort': 'Port COM', 'station.noPorts': 'Aucun port', 'station.usbRelayHint': "Cartes USB-série bon marché (CH340/LCUS) protocole A0. Si la tienne ne commute pas, donne-moi le modèle / jeu de commandes.", 'station.labels': 'Libellés des relais', 'station.cancel': 'Annuler', 'station.save': 'Enregistrer', 'sec.awards': 'Diplômes', 'sec.cat': 'Interface CAT', 'sec.rotator': 'Rotator', 'sec.winkeyer': 'Manipulateur CW', 'sec.antenna': 'Antenne motorisée', 'sec.antgenius': 'Antenna Genius', 'sec.pgxl': 'Power Genius', 'sec.flex': 'FlexRadio', 'sec.audio': 'Périphériques audio', 'sec.relayauto': 'Relais automatiques', diff --git a/frontend/wailsjs/go/models.ts b/frontend/wailsjs/go/models.ts index e652eb1..0b1075d 100644 --- a/frontend/wailsjs/go/models.ts +++ b/frontend/wailsjs/go/models.ts @@ -2600,6 +2600,7 @@ export namespace main { host: string; user?: string; pass?: string; + channels?: number; labels: string[]; static createFrom(source: any = {}) { @@ -2614,6 +2615,7 @@ export namespace main { this.host = source["host"]; this.user = source["user"]; this.pass = source["pass"]; + this.channels = source["channels"]; this.labels = source["labels"]; } } diff --git a/internal/relaydev/denkovi_other.go b/internal/relaydev/denkovi_other.go index ae6048d..1260a11 100644 --- a/internal/relaydev/denkovi_other.go +++ b/internal/relaydev/denkovi_other.go @@ -10,12 +10,17 @@ import ( "fmt" ) -type denkoviStub struct{} +type denkoviStub struct{ count int } // NewDenkovi returns a stub on non-Windows builds. -func NewDenkovi(serial string) Device { return denkoviStub{} } +func NewDenkovi(serial string, count int) Device { + if count != 4 { + count = 8 + } + return denkoviStub{count: count} +} -func (denkoviStub) Count() int { return 8 } +func (s denkoviStub) Count() int { return s.count } func (denkoviStub) Status(context.Context) ([]bool, error) { return nil, fmt.Errorf("Denkovi USB relay board is only supported on Windows") } diff --git a/internal/relaydev/denkovi_windows.go b/internal/relaydev/denkovi_windows.go index 2fe9868..66eda1b 100644 --- a/internal/relaydev/denkovi_windows.go +++ b/internal/relaydev/denkovi_windows.go @@ -46,10 +46,14 @@ type denkovi struct { opened bool } -// NewDenkovi builds a driver for a Denkovi USB 8-relay board identified by its -// FTDI serial number (shown by the vendor tool / FT_PROG, e.g. "DAE0006K"). -func NewDenkovi(serial string) Device { - return &denkovi{serial: strings.TrimSpace(serial), count: 8} +// NewDenkovi builds a driver for a Denkovi USB relay board (4 or 8 relays) +// identified by its FTDI serial number (shown by the vendor tool / FT_PROG, +// e.g. "DAE0006K"). count defaults to 8; a 4-relay board just uses the low 4 bits. +func NewDenkovi(serial string, count int) Device { + if count != 4 && count != 8 { + count = 8 + } + return &denkovi{serial: strings.TrimSpace(serial), count: count} } func (d *denkovi) Count() int { return d.count } diff --git a/internal/relaydev/serialrelay.go b/internal/relaydev/serialrelay.go new file mode 100644 index 0000000..6ec3b46 --- /dev/null +++ b/internal/relaydev/serialrelay.go @@ -0,0 +1,89 @@ +package relaydev + +import ( + "context" + "fmt" + "strings" + "sync" + + "go.bug.st/serial" +) + +// serialRelay drives the common cheap USB-serial relay boards (CH340 / LCUS-1 +// style) that use the "A0" command protocol over a virtual COM port: +// +// [0xA0] [relay 1-based] [state 0|1] [checksum] checksum = (0xA0+relay+state) & 0xFF +// +// e.g. relay 1 ON = A0 01 01 A2, relay 1 OFF = A0 01 00 A1. These boards are +// write-only (no state readback), so Status reflects a shadow of what we sent. +// Channel count varies by board (1/2/4/8/16), so it is configurable. +type serialRelay struct { + portName string + count int + baud int + mu sync.Mutex + port serial.Port + shadow []bool +} + +// NewSerialRelay builds a driver for a CH340/LCUS-style USB-serial relay board on +// the given COM port with `count` channels (defaults to 8). +func NewSerialRelay(port string, count int) Device { + if count < 1 { + count = 8 + } + return &serialRelay{portName: strings.TrimSpace(port), count: count, baud: 9600, shadow: make([]bool, count)} +} + +func (s *serialRelay) Count() int { return s.count } + +func (s *serialRelay) ensureOpen() error { + if s.port != nil { + return nil + } + if s.portName == "" { + return fmt.Errorf("no COM port set for the USB relay board") + } + p, err := serial.Open(s.portName, &serial.Mode{BaudRate: s.baud}) + if err != nil { + return fmt.Errorf("open %s: %w", s.portName, err) + } + s.port = p + return nil +} + +func (s *serialRelay) Set(ctx context.Context, relay int, on bool) error { + if relay < 1 || relay > s.count { + return fmt.Errorf("relay %d out of range 1..%d", relay, s.count) + } + s.mu.Lock() + defer s.mu.Unlock() + if err := s.ensureOpen(); err != nil { + return err + } + st := byte(0) + if on { + st = 1 + } + r := byte(relay) + frame := []byte{0xA0, r, st, byte(0xA0) + r + st} // last byte = checksum + if _, err := s.port.Write(frame); err != nil { + // Drop the handle so the next call reopens (USB unplugged / port reset). + s.port.Close() + s.port = nil + return fmt.Errorf("write to %s: %w", s.portName, err) + } + s.shadow[relay-1] = on + return nil +} + +func (s *serialRelay) Status(ctx context.Context) ([]bool, error) { + s.mu.Lock() + defer s.mu.Unlock() + if err := s.ensureOpen(); err != nil { + return nil, err + } + out := make([]bool, s.count) + copy(out, s.shadow) + return out, nil +}