fix: correct SPE status CSV field alignment (leading empty field shifts indices +1); decode band code; OPERATE/STANDBY now reflects real amp state

internal/spe/spe.go

@@ -279,26 +279,64 @@ func (c *Client) decodeCSV(payload string) {
 	}
 	c.status.Connected = true
 	c.status.LastError = ""
-	c.status.Model = get(0)
-	c.status.Operate = get(1) == "O"
-	c.status.TX = get(2) == "T"
-	c.status.Input = get(4)
-	c.status.Band = get(5)
-	c.status.PowerLevel = get(8)
-	c.status.OutputW = pi(get(9))
-	c.status.SWRATU = pf(get(10))
-	c.status.SWRAnt = pf(get(11))
-	c.status.VoltPA = pf(get(12))
-	c.status.CurrPA = pf(get(13))
-	c.status.TempC = pi(get(14))
-	if w := get(17); w != "" && w != "N" {
+	// The real frame carries a leading empty field (it starts with a comma), so the
+	// 19 documented fields live at indices 1..19, not 0..18. Verified against a live
+	// 1.3K-FA: ",13K,S,R,A,1,05,1b,0r,M,0000, 0.00, 0.00, 1.3, 0.0, 26,000,000,N,N,".
+	c.status.Model = get(1)
+	c.status.Operate = get(2) == "O" // "O" = OPERATE, "S" = STANDBY
+	c.status.TX = get(3) == "T"      // "T" = transmit, "R" = receive
+	c.status.Input = get(5)
+	c.status.Band = bandName(get(6))
+	c.status.PowerLevel = get(9)
+	c.status.OutputW = pi(get(10))
+	c.status.SWRATU = pf(get(11))
+	c.status.SWRAnt = pf(get(12))
+	c.status.VoltPA = pf(get(13))
+	c.status.CurrPA = pf(get(14))
+	c.status.TempC = pi(get(15))
+	if w := get(18); w != "" && w != "N" {
 		c.status.Warnings = w
 	} else {
 		c.status.Warnings = ""
 	}
-	if a := get(18); a != "" && a != "N" {
+	if a := get(19); a != "" && a != "N" {
 		c.status.Alarms = a
 	} else {
 		c.status.Alarms = ""
 	}
 }
+
+// bandName maps the SPE 2-digit band index to a human band label, falling back to
+// the raw code for anything unrecognised.
+func bandName(code string) string {
+	switch strings.TrimSpace(code) {
+	case "00":
+		return "160m"
+	case "01":
+		return "80m"
+	case "02":
+		return "60m"
+	case "03":
+		return "40m"
+	case "04":
+		return "30m"
+	case "05":
+		return "20m"
+	case "06":
+		return "17m"
+	case "07":
+		return "15m"
+	case "08":
+		return "12m"
+	case "09":
+		return "10m"
+	case "10":
+		return "6m"
+	case "11":
+		return "4m"
+	case "":
+		return ""
+	default:
+		return code
+	}
+}