add barometric pressure

internal/mqttingest/latest.go

@@ -16,8 +16,10 @@ const (
 type Latest struct {
 	mu sync.RWMutex
 
-	lastTS time.Time
-	last   *WS90Payload
+	lastTS  time.Time
+	last    *WS90Payload
+	baroTS  time.Time
+	baroHPA *float64
 
 	// Rain tracking
 	mode       rainMode
@@ -144,6 +146,7 @@ type Snapshot struct {
 
 	RainLastHourMM float64
 	DailyRainMM    float64
+	PressureHPA    *float64
 }
 
 func (l *Latest) Snapshot() (Snapshot, bool) {
@@ -162,10 +165,25 @@ func (l *Latest) Snapshot() (Snapshot, bool) {
 		daySum += rp.mm
 	}
 
+	var pressure *float64
+	if l.baroHPA != nil {
+		v := *l.baroHPA
+		pressure = &v
+	}
+
 	return Snapshot{
 		TS:             l.lastTS,
 		P:              *l.last,
 		RainLastHourMM: hourSum,
 		DailyRainMM:    daySum,
+		PressureHPA:    pressure,
 	}, true
 }
+
+func (l *Latest) UpdateBarometer(ts time.Time, pressureHPA float64) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+
+	l.baroTS = ts
+	l.baroHPA = &pressureHPA
+}