Implement weather via MET Norway

This commit is contained in:
Elara 2022-02-21 16:18:52 -08:00
parent 57768acb94
commit 032f735526
6 changed files with 299 additions and 5 deletions

1
.gitignore vendored
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@ -1,3 +1,4 @@
/itctl
/itd
/itgui
/version.txt

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@ -3,13 +3,14 @@ BIN_PREFIX = $(DESTDIR)$(PREFIX)/bin
SERVICE_PREFIX = $(DESTDIR)$(PREFIX)/lib/systemd/user
CFG_PREFIX = $(DESTDIR)/etc
all:
all: version
go build $(GOFLAGS)
go build ./cmd/itctl $(GOFLAGS)
clean:
rm -f itctl
rm -f itd
printf "unknown" > version.txt
install:
install -Dm755 ./itd $(BIN_PREFIX)/itd
@ -23,4 +24,7 @@ uninstall:
rm $(SERVICE_PREFIX)/itd.service
rm $(CFG_PREFIX)/itd.toml
.PHONY: all clean install uninstall
version:
printf "r%s.%s" "$(shell git rev-list --count HEAD)" "$(shell git rev-parse --short HEAD)" > version.txt
.PHONY: all clean install uninstall version

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@ -186,3 +186,11 @@ This will compile `itd` and `itctl` for Linux aarch64 which is what runs on the
This daemon places a config file at `/etc/itd.toml`. This is the global config. `itd` will also look for a config at `~/.config/itd.toml`.
Most of the time, the daemon does not need to be restarted for config changes to take effect.
---
### Attribution
Location data from OpenStreetMap Nominatim, © [OpenStreetMap](https://www.openstreetmap.org/copyright) contributors
Weather data from the [Norwegian Meteorological Institute](https://www.met.no/en)

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@ -26,3 +26,5 @@
[music]
vol.interval = 5
[weather]
location = "Los Angeles, CA"

10
main.go
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@ -19,20 +19,23 @@
package main
import (
_ "embed"
"fmt"
"os"
"strconv"
"time"
"github.com/gen2brain/dlgs"
"github.com/knadh/koanf"
"github.com/mattn/go-isatty"
"github.com/rs/zerolog/log"
"go.arsenm.dev/infinitime"
"github.com/knadh/koanf"
)
var k = koanf.New(".")
//go:embed version.txt
var version string
var (
firmwareUpdating = false
@ -78,7 +81,10 @@ func main() {
}
}
// FS must be updated on reconnect
updateFS = true
// Resend weather on reconnect
sendWeatherCh <- struct{}{}
}
// Get firmware version
@ -123,6 +129,8 @@ func main() {
log.Error().Err(err).Msg("Error initializing notification relay")
}
initWeather(dev)
// Start control socket
err = startSocket(dev)
if err != nil {

271
weather.go Normal file
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@ -0,0 +1,271 @@
package main
import (
"encoding/json"
"fmt"
"math"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"github.com/rs/zerolog/log"
"go.arsenm.dev/infinitime"
"go.arsenm.dev/infinitime/weather"
)
// METResponse represents a response from
// the MET Norway API
type METResponse struct {
Properties struct {
Timeseries []struct {
Time time.Time
Data METData
}
}
}
// METData represents data in a METResponse
type METData struct {
Instant struct {
Details struct {
AirPressure float32 `json:"air_pressure_at_sea_level"`
AirTemperature float32 `json:"air_temperature"`
DewPoint float32 `json:"dew_point_temperature"`
CloudAreaFraction float32 `json:"cloud_area_fraction"`
FogAreaFraction float32 `json:"fog_area_fraction"`
RelativeHumidity float32 `json:"relative_humidity"`
UVIndex float32 `json:"ultraviolet_index_clear_sky"`
WindDirection float32 `json:"wind_from_direction"`
WindSpeed float32 `json:"wind_speed"`
}
}
NextHour struct {
Summary struct {
SymbolCode string `json:"symbol_code"`
}
Details struct {
PrecipitationAmount float32 `json:"precipitation_amount"`
}
} `json:"next_1_hours"`
}
// OSMData represents lat/long data from
// OpenStreetMap Nominatim
type OSMData []struct {
Lat string `json:"lat"`
Lon string `json:"lon"`
}
var sendWeatherCh = make(chan struct{}, 1)
func initWeather(dev *infinitime.Device) error {
// Get location based on string in config
lat, lon, err := getLocation(k.String("weather.location"))
if err != nil {
return err
}
timer := time.NewTimer(time.Hour)
go func() {
for {
// Attempt to get weather
data, err := getWeather(lat, lon)
if err != nil {
log.Warn().Err(err).Msg("Error getting weather data")
// Wait 15 minutes before retrying
time.Sleep(15 * time.Minute)
continue
}
// Get current data
current := data.Properties.Timeseries[0]
currentData := current.Data.Instant.Details
// Add temperature event
err = dev.AddWeatherEvent(weather.TemperatureEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypeTemperature,
time.Hour,
),
Temperature: int16(round(currentData.AirTemperature * 100)),
DewPoint: int16(round(currentData.DewPoint)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding temperature event")
}
// Add precipitation event
err = dev.AddWeatherEvent(weather.PrecipitationEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypePrecipitation,
time.Hour,
),
Type: parseSymbol(current.Data.NextHour.Summary.SymbolCode),
Amount: uint8(round(current.Data.NextHour.Details.PrecipitationAmount)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding precipitation event")
}
// Add wind event
err = dev.AddWeatherEvent(weather.WindEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypeWind,
time.Hour,
),
SpeedMin: uint8(round(currentData.WindSpeed)),
SpeedMax: uint8(round(currentData.WindSpeed)),
DirectionMin: uint8(round(currentData.WindDirection)),
DirectionMax: uint8(round(currentData.WindDirection)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding wind event")
}
// Add cloud event
err = dev.AddWeatherEvent(weather.CloudsEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypeClouds,
time.Hour,
),
Amount: uint8(round(currentData.CloudAreaFraction)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding clouds event")
}
// Add humidity event
err = dev.AddWeatherEvent(weather.HumidityEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypeHumidity,
time.Hour,
),
Humidity: uint8(round(currentData.RelativeHumidity)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding humidity event")
}
// Add pressure event
err = dev.AddWeatherEvent(weather.PressureEvent{
TimelineHeader: weather.NewHeader(
weather.EventTypePressure,
time.Hour,
),
Pressure: int16(round(currentData.AirPressure)),
})
if err != nil {
log.Error().Err(err).Msg("Error adding pressure event")
}
timer.Reset(time.Hour)
select {
case <-timer.C:
timer.Stop()
case <-sendWeatherCh:
timer.Stop()
}
}
}()
return nil
}
// getLocation returns the latitude and longitude
// given a location
func getLocation(loc string) (lat, lon float64, err error) {
// Create request URL and perform GET request
reqURL := fmt.Sprintf("https://nominatim.openstreetmap.org/search.php?q=%s&format=jsonv2", url.QueryEscape(loc))
res, err := http.Get(reqURL)
if err != nil {
return
}
// Decode JSON from response into OSMData
data := OSMData{}
err = json.NewDecoder(res.Body).Decode(&data)
if err != nil {
return
}
// If no data points
if len(data) == 0 {
return
}
// Get first data point
out := data[0]
// Attempt to parse latitude
lat, err = strconv.ParseFloat(out.Lat, 64)
if err != nil {
return
}
// Attempt to parse longitude
lon, err = strconv.ParseFloat(out.Lon, 64)
if err != nil {
return
}
return
}
// getWeather gets weather data given a latitude and longitude
func getWeather(lat, lon float64) (*METResponse, error) {
// Create new GET request
req, err := http.NewRequest(
http.MethodGet,
fmt.Sprintf(
"https://api.met.no/weatherapi/locationforecast/2.0/complete?lat=%.2f&lon=%.2f",
lat,
lon,
),
nil,
)
if err != nil {
return nil, err
}
// Set identifying user agent as per NMI requirements
req.Header.Set("User-Agent", fmt.Sprintf("ITD/%s gitea.arsenm.dev/Arsen6331/itd", version))
// Perform request
res, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
// Decode JSON from response to METResponse struct
out := &METResponse{}
err = json.NewDecoder(res.Body).Decode(out)
if err != nil {
return nil, err
}
return out, nil
}
// parseSymbol determines what type of precipitation a symbol code
// codes for.
func parseSymbol(symCode string) weather.PrecipitationType {
switch {
case strings.Contains(symCode, "lightrain"):
return weather.PrecipitationTypeRain
case strings.Contains(symCode, "rain"):
return weather.PrecipitationTypeRain
case strings.Contains(symCode, "snow"):
return weather.PrecipitationTypeSnow
case strings.Contains(symCode, "sleet"):
return weather.PrecipitationTypeSleet
case strings.Contains(symCode, "snow"):
return weather.PrecipitationTypeSnow
default:
return weather.PrecipitationTypeNone
}
}
// round rounds 32-bit floats to 32-bit integers
func round(f float32) int32 {
return int32(math.Round(float64(f)))
}