add support for barometric pressure

README.md

@@ -10,7 +10,7 @@ Starter weather-station data pipeline:
    `docker compose up -d`
 
 2) Configure:
-   edit `config.yaml` (or `test.yaml`) with your MQTT broker, topic, and site coordinates.
+   edit `config.yaml` (or `test.yaml`) with your MQTT broker, topics, and site coordinates.
 
 3) Run the ingest service locally:
    `go run ./cmd/ingestd -config config.yaml`
@@ -27,8 +27,14 @@ mqtt:
   client_id: "go-weatherstation-ingestd" # Client ID
   username: ""                     # Optional username
   password: ""                     # Optional password
-  topic: "ecowitt/ws90"             # Topic to subscribe to
-  qos: 1                            # MQTT QoS (0, 1, or 2)
+  qos: 1                            # Default MQTT QoS (0, 1, or 2)
+  topics:
+    - name: "ws90"
+      topic: "ecowitt/ws90"         # WS90 payload topic
+      type: "ws90"
+    - name: "baro"
+      topic: "sensors/barometer"    # Barometric pressure topic
+      type: "baro"
 
 db:
   conn_string: "postgres://postgres:postgres@timescaledb:5432/micrometeo?sslmode=disable"
@@ -59,11 +65,13 @@ wunderground:
 ### Notes
 - The Open-Meteo ECMWF endpoint is queried by the poller only. The UI reads forecasts from TimescaleDB.
 - Web UI supports Local/UTC toggle and date-aligned ranges (6h, 24h, 72h, 7d).
+- `mqtt.topic` is still supported for single-topic configs, but `mqtt.topics` is preferred.
 
 ## Schema & tables
 TimescaleDB schema is initialized from `db/init/001_schema.sql` and includes:
 
 - `observations_ws90` (hypertable): raw WS90 observations with payload metadata, plus the full JSON payload (`payload_json`).
+- `observations_baro` (hypertable): barometric pressure observations from other MQTT topics.
 - `forecast_openmeteo_hourly` (hypertable): hourly forecast points keyed by `(site, model, retrieved_at, ts)`.
 - Continuous aggregates:
   - `cagg_ws90_1m`: 1‑minute rollups (avg/min/max for temp, humidity, wind, uvi, light, rain).
@@ -71,6 +79,7 @@ TimescaleDB schema is initialized from `db/init/001_schema.sql` and includes:
 
 Retention/compression:
 - `observations_ws90` has a 90‑day retention policy and compression after 7 days.
+- `observations_baro` has a 90‑day retention policy and compression after 7 days.
 
 ## Publish a test WS90 payload
 ```sh

cmd/ingestd/main.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 	"time"
 
@@ -70,17 +71,44 @@ func main() {
 		go runWundergroundUploader(ctx, latest, cfg.Wunderground.StationID, cfg.Wunderground.StationKey, cfg.Wunderground.Interval)
 	}
 
+	bindings := make([]mqttTopicBinding, 0, len(cfg.MQTT.Topics))
+	subscriptions := make([]mqttingest.Subscription, 0, len(cfg.MQTT.Topics))
+	for _, t := range cfg.MQTT.Topics {
+		qos := cfg.MQTT.QoS
+		if t.QoS != nil {
+			qos = *t.QoS
+		}
+		topicType := strings.ToLower(t.Type)
+		bindings = append(bindings, mqttTopicBinding{
+			Name:  t.Name,
+			Topic: t.Topic,
+			Type:  topicType,
+			QoS:   qos,
+		})
+		subscriptions = append(subscriptions, mqttingest.Subscription{
+			Topic: t.Topic,
+			QoS:   qos,
+		})
+	}
+
 	// MQTT subscriber (blocks until ctx done)
 	err = mqttingest.RunSubscriber(ctx, mqttingest.MQTTConfig{
 		Broker:   cfg.MQTT.Broker,
 		ClientID: cfg.MQTT.ClientID,
 		Username: cfg.MQTT.Username,
 		Password: cfg.MQTT.Password,
-		Topic:    cfg.MQTT.Topic,
-		QoS:      cfg.MQTT.QoS,
+		Topics:   subscriptions,
 	}, func(ctx context.Context, topic string, payload []byte) error {
 		log.Printf("mqtt message topic=%s bytes=%d payload=%s", topic, len(payload), string(payload))
 
+		binding := matchMQTTBinding(bindings, topic)
+		if binding == nil {
+			log.Printf("mqtt message ignored topic=%s reason=unmatched", topic)
+			return nil
+		}
+
+		switch binding.Type {
+		case "ws90":
 			p, raw, err := mqttingest.ParseWS90(payload)
 			if err != nil {
 				log.Printf("ws90 parse error topic=%s err=%v payload=%s", topic, err, string(payload))
@@ -124,6 +152,33 @@ func main() {
 			}); err != nil {
 				log.Printf("db insert ws90 error: %v", err)
 			}
+		case "baro", "barometer", "pressure":
+			p, raw, err := mqttingest.ParseBarometer(payload)
+			if err != nil {
+				log.Printf("barometer parse error topic=%s err=%v payload=%s", topic, err, string(payload))
+				return nil
+			}
+
+			ts := time.Now().UTC()
+			source := binding.Name
+			if source == "" {
+				source = binding.Topic
+			}
+
+			if err := d.InsertBarometer(ctx, db.InsertBarometerParams{
+				TS:          ts,
+				Site:        cfg.Site.Name,
+				Source:      source,
+				PressureHPA: p.PressureHPA,
+				Payload:     raw,
+			}); err != nil {
+				log.Printf("db insert barometer error: %v", err)
+			} else {
+				log.Printf("barometer stored source=%s pressure_hpa=%.2f", source, p.PressureHPA)
+			}
+		default:
+			log.Printf("mqtt message ignored topic=%s reason=unknown_type type=%s", topic, binding.Type)
+		}
 
 		return nil
 	})
@@ -132,6 +187,22 @@ func main() {
 	}
 }
 
+type mqttTopicBinding struct {
+	Name  string
+	Topic string
+	Type  string
+	QoS   byte
+}
+
+func matchMQTTBinding(bindings []mqttTopicBinding, topic string) *mqttTopicBinding {
+	for i := range bindings {
+		if mqttingest.TopicMatches(bindings[i].Topic, topic) {
+			return &bindings[i]
+		}
+	}
+	return nil
+}
+
 func runOpenMeteoPoller(ctx context.Context, d *db.DB, cache *ForecastCache, site providers.Site, model string, interval time.Duration) {
 	p := &providers.OpenMeteo{}
 	t := time.NewTicker(interval)

config.yaml

@@ -1,8 +1,14 @@
 mqtt:
   broker: "tcp://mosquitto:1883"
   client_id: "go-weatherstation-ingestd"
-  topic: "ecowitt/ws90"
   qos: 1
+  topics:
+    - name: "ws90"
+      topic: "ecowitt/ws90"
+      type: "ws90"
+    # - name: "baro"
+    #   topic: "sensors/barometer"
+    #   type: "baro"
 
 db:
   conn_string: "postgres://postgres:postgres@timescaledb:5432/micrometeo?sslmode=disable"

db/init/001_schema.sql

@@ -41,6 +41,21 @@ SELECT create_hypertable('observations_ws90', 'ts', if_not_exists => TRUE);
 CREATE INDEX IF NOT EXISTS idx_observations_ws90_site_ts ON observations_ws90(site, ts DESC);
 CREATE INDEX IF NOT EXISTS idx_observations_ws90_station_ts ON observations_ws90(station_id, ts DESC);
 
+-- Barometric pressure observations (from other MQTT sources)
+CREATE TABLE IF NOT EXISTS observations_baro (
+  ts              TIMESTAMPTZ NOT NULL,
+  received_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
+  site            TEXT NOT NULL,
+  source          TEXT NOT NULL,
+  pressure_hpa    DOUBLE PRECISION,
+  payload_json    JSONB
+);
+
+SELECT create_hypertable('observations_baro', 'ts', if_not_exists => TRUE);
+
+CREATE INDEX IF NOT EXISTS idx_observations_baro_site_ts ON observations_baro(site, ts DESC);
+CREATE INDEX IF NOT EXISTS idx_observations_baro_source_ts ON observations_baro(source, ts DESC);
+
 -- Open-Meteo hourly baseline forecasts
 CREATE TABLE IF NOT EXISTS forecast_openmeteo_hourly (
   ts               TIMESTAMPTZ NOT NULL,
@@ -100,6 +115,37 @@ BEGIN
   END IF;
 END$$;
 
+-- Raw retention: 90 days (barometric pressure)
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM timescaledb_information.jobs j
+    WHERE j.proc_name = 'policy_retention'
+      AND j.hypertable_name = 'observations_baro'
+  ) THEN
+    PERFORM add_retention_policy('observations_baro', INTERVAL '90 days');
+  END IF;
+END$$;
+
+-- Compression after 7 days
+ALTER TABLE observations_baro SET (
+  timescaledb.compress,
+  timescaledb.compress_segmentby = 'site,source'
+);
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM timescaledb_information.jobs
+    WHERE proc_name = 'policy_compression'
+      AND hypertable_name = 'observations_baro'
+  ) THEN
+    PERFORM add_compression_policy('observations_baro', INTERVAL '7 days');
+  END IF;
+END$$;
+
 -- 1-minute continuous aggregate
 CREATE MATERIALIZED VIEW IF NOT EXISTS cagg_ws90_1m
 WITH (timescaledb.continuous) AS

internal/config/config.go

@@ -3,6 +3,7 @@ package config
 import (
 	"errors"
 	"os"
+	"strings"
 	"time"
 
 	"gopkg.in/yaml.v3"
@@ -18,6 +19,7 @@ type Config struct {
 		Password string      `yaml:"password"`
 		Topic    string      `yaml:"topic"`
 		QoS      byte        `yaml:"qos"`
+		Topics   []MQTTTopic `yaml:"topics"`
 	} `yaml:"mqtt"`
 
 	DB struct {
@@ -52,6 +54,13 @@ type Config struct {
 	} `yaml:"wunderground"`
 }
 
+type MQTTTopic struct {
+	Name  string `yaml:"name"`
+	Topic string `yaml:"topic"`
+	Type  string `yaml:"type"`
+	QoS   *byte  `yaml:"qos"`
+}
+
 func Load(path string) (*Config, error) {
 	b, err := os.ReadFile(path)
 	if err != nil {
@@ -64,8 +73,31 @@ func Load(path string) (*Config, error) {
 	}
 
 	// Minimal validation
-	if c.MQTT.Broker == "" || c.MQTT.Topic == "" {
-		return nil, errors.New("mqtt broker and topic are required")
+	if c.MQTT.Broker == "" {
+		return nil, errors.New("mqtt broker is required")
+	}
+	if len(c.MQTT.Topics) == 0 && c.MQTT.Topic != "" {
+		qos := c.MQTT.QoS
+		c.MQTT.Topics = []MQTTTopic{{
+			Name:  "ws90",
+			Topic: c.MQTT.Topic,
+			Type:  "ws90",
+			QoS:   &qos,
+		}}
+	}
+	if len(c.MQTT.Topics) == 0 {
+		return nil, errors.New("mqtt topic(s) are required")
+	}
+	for i := range c.MQTT.Topics {
+		t := c.MQTT.Topics[i]
+		if t.Topic == "" {
+			return nil, errors.New("mqtt topics must include topic")
+		}
+		if t.Type == "" {
+			t.Type = "ws90"
+		}
+		t.Type = strings.ToLower(t.Type)
+		c.MQTT.Topics[i] = t
 	}
 	if c.DB.ConnString == "" {
 		return nil, errors.New("db conn_string is required")

internal/db/queries.go

@@ -122,3 +122,27 @@ func (d *DB) UpsertOpenMeteoHourly(ctx context.Context, p InsertOpenMeteoHourlyP
 
 	return err
 }
+
+type InsertBarometerParams struct {
+	TS          time.Time
+	Site        string
+	Source      string
+	PressureHPA float64
+	Payload     map[string]any
+}
+
+func (d *DB) InsertBarometer(ctx context.Context, p InsertBarometerParams) error {
+	b, _ := json.Marshal(p.Payload)
+
+	payloadJSON := json.RawMessage(b)
+
+	_, err := d.Pool.Exec(ctx, `
+		INSERT INTO observations_baro (
+			ts, site, source, pressure_hpa, payload_json
+		) VALUES (
+			$1,$2,$3,$4,$5
+		)
+	`, p.TS, p.Site, p.Source, p.PressureHPA, payloadJSON)
+
+	return err
+}

internal/mqttingest/barometer.go

@@ -0,0 +1,105 @@
+package mqttingest
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type BarometerPayload struct {
+	PressureHPA float64
+}
+
+func ParseBarometer(b []byte) (*BarometerPayload, map[string]any, error) {
+	var raw map[string]any
+	if err := json.Unmarshal(b, &raw); err != nil {
+		return nil, nil, err
+	}
+
+	pressure, ok := pressureHPAFromPayload(raw)
+	if !ok {
+		return nil, raw, fmt.Errorf("barometer payload missing pressure field")
+	}
+
+	return &BarometerPayload{
+		PressureHPA: pressure,
+	}, raw, nil
+}
+
+func pressureHPAFromPayload(raw map[string]any) (float64, bool) {
+	if v, ok := findFloat(raw,
+		"pressure_hpa",
+		"pressure_mb",
+		"pressure_mbar",
+		"barometer_hpa",
+		"baro_hpa",
+		"pressure",
+	); ok {
+		return v, true
+	}
+	if v, ok := findFloat(raw, "pressure_pa"); ok {
+		return v / 100.0, true
+	}
+	if v, ok := findFloat(raw, "pressure_kpa"); ok {
+		return v * 10.0, true
+	}
+	if v, ok := findFloat(raw, "pressure_inhg", "barometer_inhg"); ok {
+		return v * 33.8638866667, true
+	}
+	return 0, false
+}
+
+func findFloat(raw map[string]any, keys ...string) (float64, bool) {
+	for _, key := range keys {
+		v, ok := raw[key]
+		if !ok {
+			continue
+		}
+		if f, ok := asFloat(v); ok {
+			return f, true
+		}
+	}
+	return 0, false
+}
+
+func asFloat(v any) (float64, bool) {
+	switch t := v.(type) {
+	case float64:
+		return t, true
+	case float32:
+		return float64(t), true
+	case int:
+		return float64(t), true
+	case int8:
+		return float64(t), true
+	case int16:
+		return float64(t), true
+	case int32:
+		return float64(t), true
+	case int64:
+		return float64(t), true
+	case uint:
+		return float64(t), true
+	case uint8:
+		return float64(t), true
+	case uint16:
+		return float64(t), true
+	case uint32:
+		return float64(t), true
+	case uint64:
+		return float64(t), true
+	case json.Number:
+		f, err := t.Float64()
+		return f, err == nil
+	case string:
+		s := strings.TrimSpace(t)
+		if s == "" {
+			return 0, false
+		}
+		f, err := strconv.ParseFloat(s, 64)
+		return f, err == nil
+	default:
+		return 0, false
+	}
+}

internal/mqttingest/mqtt.go

@@ -15,6 +15,12 @@ type MQTTConfig struct {
 	Password string
 	Topic    string
 	QoS      byte
+	Topics   []Subscription
+}
+
+type Subscription struct {
+	Topic string
+	QoS   byte
 }
 
 type Handler func(ctx context.Context, topic string, payload []byte) error
@@ -38,7 +44,22 @@ func RunSubscriber(ctx context.Context, cfg MQTTConfig, h Handler) error {
 	}
 
 	// Subscribe
-	if tok := client.Subscribe(cfg.Topic, cfg.QoS, func(_ mqtt.Client, msg mqtt.Message) {
+	subs := map[string]byte{}
+	if len(cfg.Topics) > 0 {
+		for _, sub := range cfg.Topics {
+			if sub.Topic == "" {
+				continue
+			}
+			subs[sub.Topic] = sub.QoS
+		}
+	} else if cfg.Topic != "" {
+		subs[cfg.Topic] = cfg.QoS
+	}
+	if len(subs) == 0 {
+		return fmt.Errorf("mqtt subscribe: no topics configured")
+	}
+
+	if tok := client.SubscribeMultiple(subs, func(_ mqtt.Client, msg mqtt.Message) {
 		// Keep callback short; do work with context
 		_ = h(ctx, msg.Topic(), msg.Payload())
 	}); tok.Wait() && tok.Error() != nil {

internal/mqttingest/topic_match.go

@@ -0,0 +1,36 @@
+package mqttingest
+
+import "strings"
+
+// TopicMatches reports whether a topic filter (with + or # wildcards) matches a topic name.
+// It follows the MQTT v3.1.1 wildcard rules and supports shared subscriptions ($share).
+func TopicMatches(filter, topic string) bool {
+	return matchTopic(routeSplit(filter), strings.Split(topic, "/"))
+}
+
+func matchTopic(route []string, topic []string) bool {
+	if len(route) == 0 {
+		return len(topic) == 0
+	}
+	if len(topic) == 0 {
+		return route[0] == "#"
+	}
+	if route[0] == "#" {
+		return true
+	}
+	if route[0] == "+" || route[0] == topic[0] {
+		return matchTopic(route[1:], topic[1:])
+	}
+	return false
+}
+
+// routeSplit removes $share/group/ when matching shared subscription filters.
+func routeSplit(route string) []string {
+	if strings.HasPrefix(route, "$share/") {
+		parts := strings.Split(route, "/")
+		if len(parts) > 2 {
+			return parts[2:]
+		}
+	}
+	return strings.Split(route, "/")
+}