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add barometric pressure

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This commit is contained in:
Nathan Coad
2026-02-02 16:10:29 +11:00
parent 6f9eee5dc0
commit 08bd117eb8
7 changed files with 146 additions and 62 deletions
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3
cmd/ingestd/main.go
View File

@@ -165,6 +165,8 @@ func main() {
source = binding.Topic
}
latest.UpdateBarometer(ts, p.PressureHPA)
if err := d.InsertBarometer(ctx, db.InsertBarometerParams{
TS: ts,
Site: cfg.Site.Name,
@@ -250,6 +252,7 @@ func runWundergroundUploader(ctx context.Context, latest *mqttingest.Latest, sta
UVI: snap.P.UVI,
RainLastHourMM: snap.RainLastHourMM,
DailyRainMM: snap.DailyRainMM,
PressureHPA: snap.PressureHPA,
DateUTC: "now",
}

13
cmd/ingestd/web/app.js
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@@ -14,6 +14,7 @@ const colors = {
forecast: "#f4b942",
gust: "#ff7d6b",
humidity: "#7ee081",
pressure: "#8fb8de",
uvi: "#f4d35e",
light: "#b8f2e6",
precip: "#4ea8de",
@@ -483,6 +484,18 @@ function renderDashboard(data) {
};
upsertChart("chart-rh", rhChart);
const pressureChart = {
type: "line",
data: {
datasets: [
{ label: "obs pressure hPa", data: series(obsFiltered, "pressure_hpa"), borderColor: colors.pressure },
{ label: "forecast msl hPa", data: series(forecast, "pressure_msl_hpa"), borderColor: colors.forecast },
],
},
options: baseOptions(range),
};
upsertChart("chart-pressure", pressureChart);
const lightOptions = baseOptions(range);
lightOptions.scales.y.ticks.color = colors.uvi;
lightOptions.scales.y.title = { display: true, text: "UVI", color: colors.uvi };

9
cmd/ingestd/web/index.html
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@@ -128,6 +128,15 @@
<canvas id="chart-rh"></canvas>
</div>
</div>
<div class="chart-card" data-chart="chart-pressure">
<div class="chart-header">
<div class="chart-title">Pressure (obs vs forecast)</div>
<button class="chart-link" data-chart="chart-pressure" title="Copy chart link">Share</button>
</div>
<div class="chart-canvas">
<canvas id="chart-pressure"></canvas>
</div>
</div>
<div class="chart-card" data-chart="chart-light">
<div class="chart-header">
<div class="chart-title">UV Index and Light</div>

42
internal/db/series.go
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@@ -14,6 +14,7 @@ type ObservationPoint struct {
TS time.Time `json:"ts"`
TempC *float64 `json:"temp_c,omitempty"`
RH *float64 `json:"rh,omitempty"`
PressureHPA *float64 `json:"pressure_hpa,omitempty"`
WindMS *float64 `json:"wind_m_s,omitempty"`
WindGustMS *float64 `json:"wind_gust_m_s,omitempty"`
WindDirDeg *float64 `json:"wind_dir_deg,omitempty"`
@@ -59,6 +60,7 @@ func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, start,
}
query := fmt.Sprintf(`
WITH ws AS (
SELECT
time_bucket(INTERVAL '%s', ts) AS bucket,
avg(temperature_c) AS temp_c_avg,
@@ -77,8 +79,35 @@ func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, start,
AND ts >= $2
AND ts <= $3
GROUP BY bucket
),
baro AS (
SELECT
time_bucket(INTERVAL '%s', ts) AS bucket,
avg(pressure_hpa) AS pressure_hpa_avg
FROM observations_baro
WHERE site = $1
AND ts >= $2
AND ts <= $3
GROUP BY bucket
)
SELECT
COALESCE(ws.bucket, baro.bucket) AS bucket,
ws.temp_c_avg,
ws.rh_avg,
baro.pressure_hpa_avg,
ws.wind_avg_ms_avg,
ws.wind_gust_ms_max,
ws.wind_dir_deg_avg,
ws.uvi_max,
ws.light_lux_max,
ws.battery_mv_avg,
ws.supercap_v_avg,
ws.rain_mm_avg,
ws.rain_start_max
FROM ws
FULL OUTER JOIN baro ON ws.bucket = baro.bucket
ORDER BY bucket ASC
`, interval)
`, interval, interval)
rows, err := d.Pool.Query(ctx, query, site, start, end)
if err != nil {
@@ -90,18 +119,19 @@ func (d *DB) ObservationSeries(ctx context.Context, site, bucket string, start,
for rows.Next() {
var (
ts time.Time
temp, rh, wind, gust sql.NullFloat64
temp, rh, pressure, wind, gust sql.NullFloat64
dir, uvi, light, battery, supercap sql.NullFloat64
rainMM sql.NullFloat64
rainStart sql.NullInt64
)
if err := rows.Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light, &battery, &supercap, &rainMM, &rainStart); err != nil {
if err := rows.Scan(&ts, &temp, &rh, &pressure, &wind, &gust, &dir, &uvi, &light, &battery, &supercap, &rainMM, &rainStart); err != nil {
return nil, err
}
points = append(points, ObservationPoint{
TS: ts,
TempC: nullFloatPtr(temp),
RH: nullFloatPtr(rh),
PressureHPA: nullFloatPtr(pressure),
WindMS: nullFloatPtr(wind),
WindGustMS: nullFloatPtr(gust),
WindDirDeg: nullFloatPtr(dir),
@@ -126,6 +156,7 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
ts,
temperature_c,
humidity,
(SELECT pressure_hpa FROM observations_baro WHERE site = $1 ORDER BY ts DESC LIMIT 1) AS pressure_hpa,
wind_avg_m_s,
wind_max_m_s,
wind_dir_deg,
@@ -143,12 +174,12 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
var (
ts time.Time
temp, rh, wind, gust sql.NullFloat64
temp, rh, pressure, wind, gust sql.NullFloat64
dir, uvi, light, battery, supercap sql.NullFloat64
rainMM sql.NullFloat64
rainStart sql.NullInt64
)
err := d.Pool.QueryRow(ctx, query, site).Scan(&ts, &temp, &rh, &wind, &gust, &dir, &uvi, &light, &battery, &supercap, &rainMM, &rainStart)
err := d.Pool.QueryRow(ctx, query, site).Scan(&ts, &temp, &rh, &pressure, &wind, &gust, &dir, &uvi, &light, &battery, &supercap, &rainMM, &rainStart)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
return nil, nil
@@ -160,6 +191,7 @@ func (d *DB) LatestObservation(ctx context.Context, site string) (*ObservationPo
TS: ts,
TempC: nullFloatPtr(temp),
RH: nullFloatPtr(rh),
PressureHPA: nullFloatPtr(pressure),
WindMS: nullFloatPtr(wind),
WindGustMS: nullFloatPtr(gust),
WindDirDeg: nullFloatPtr(dir),

4
internal/mqttingest/barometer.go
View File

@@ -38,13 +38,13 @@ func pressureHPAFromPayload(raw map[string]any) (float64, bool) {
); ok {
return v, true
}
if v, ok := findFloat(raw, "pressure_pa"); ok {
if v, ok := findFloat(raw, "pressure_pa", "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 {
if v, ok := findFloat(raw, "pressure_inhg", "barometer_inhg", "altim"); ok {
return v * 33.8638866667, true
}
return 0, false

18
internal/mqttingest/latest.go
View File

@@ -18,6 +18,8 @@ type Latest struct {
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
}

9
internal/providers/wunderground.go
View File

@@ -33,6 +33,7 @@ type WUUpload struct {
RainLastHourMM float64
DailyRainMM float64
PressureHPA *float64
DateUTC string // "now" recommended
}
@@ -63,6 +64,11 @@ func (c *WundergroundClient) Upload(ctx context.Context, u WUUpload) (string, er
// UV index
q.Set("UV", fmt.Sprintf("%.2f", u.UVI))
// Barometric pressure (inHg)
if u.PressureHPA != nil {
q.Set("baromin", fmt.Sprintf("%.4f", hPaToInHg(*u.PressureHPA)))
}
// NOTE: your WS90 payload provides light in lux, not W/m^2.
// WU expects solarradiation in W/m^2, so we omit it unless you add a conversion/actual sensor field.
if u.SolarWm2 != nil {
@@ -110,3 +116,6 @@ func (c *WundergroundClient) Upload(ctx context.Context, u WUUpload) (string, er
func cToF(c float64) float64 { return (c * 9.0 / 5.0) + 32.0 }
func msToMph(ms float64) float64 { return ms * 2.2369362920544 }
func mmToIn(mm float64) float64 { return mm / 25.4 }
func hPaToInHg(hpa float64) float64 {
return hpa * 0.0295299830714
}