Store things in sqlite

go.mod

@@ -1,3 +1,18 @@
 module furnacecheck
 
 go 1.24.4
+
+require modernc.org/sqlite v1.40.1
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
+	golang.org/x/sys v0.36.0 // indirect
+	modernc.org/libc v1.66.10 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+)

go.sum

@@ -1,2 +1,49 @@
-gocv.io/x/gocv v0.42.0 h1:AAsrFJH2aIsQHukkCovWqj0MCGZleQpVyf5gNVRXjQI=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
-gocv.io/x/gocv v0.42.0/go.mod h1:zYdWMj29WAEznM3Y8NsU3A0TRq/wR/cy75jeUypThqU=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e h1:ijClszYn+mADRFY17kjQEVQ1XRhq2/JR1M3sGqeJoxs=
+github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e/go.mod h1:boTsfXsheKC2y+lKOCMpSfarhxDeIzfZG1jqGcPl3cA=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
+github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b h1:M2rDM6z3Fhozi9O7NWsxAkg/yqS/lQJ6PmkyIV3YP+o=
+golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b/go.mod h1:3//PLf8L/X+8b4vuAfHzxeRUl04Adcb341+IGKfnqS8=
+golang.org/x/mod v0.27.0 h1:kb+q2PyFnEADO2IEF935ehFUXlWiNjJWtRNgBLSfbxQ=
+golang.org/x/mod v0.27.0/go.mod h1:rWI627Fq0DEoudcK+MBkNkCe0EetEaDSwJJkCcjpazc=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
+golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/tools v0.36.0 h1:kWS0uv/zsvHEle1LbV5LE8QujrxB3wfQyxHfhOk0Qkg=
+golang.org/x/tools v0.36.0/go.mod h1:WBDiHKJK8YgLHlcQPYQzNCkUxUypCaa5ZegCVutKm+s=
+modernc.org/cc/v4 v4.26.5 h1:xM3bX7Mve6G8K8b+T11ReenJOT+BmVqQj0FY5T4+5Y4=
+modernc.org/cc/v4 v4.26.5/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
+modernc.org/ccgo/v4 v4.28.1 h1:wPKYn5EC/mYTqBO373jKjvX2n+3+aK7+sICCv4Fjy1A=
+modernc.org/ccgo/v4 v4.28.1/go.mod h1:uD+4RnfrVgE6ec9NGguUNdhqzNIeeomeXf6CL0GTE5Q=
+modernc.org/fileutil v1.3.40 h1:ZGMswMNc9JOCrcrakF1HrvmergNLAmxOPjizirpfqBA=
+modernc.org/fileutil v1.3.40/go.mod h1:HxmghZSZVAz/LXcMNwZPA/DRrQZEVP9VX0V4LQGQFOc=
+modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
+modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
+modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
+modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
+modernc.org/libc v1.66.10 h1:yZkb3YeLx4oynyR+iUsXsybsX4Ubx7MQlSYEw4yj59A=
+modernc.org/libc v1.66.10/go.mod h1:8vGSEwvoUoltr4dlywvHqjtAqHBaw0j1jI7iFBTAr2I=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
+modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
+modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
+modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
+modernc.org/sqlite v1.40.1 h1:VfuXcxcUWWKRBuP8+BR9L7VnmusMgBNNnBYGEe9w/iY=
+modernc.org/sqlite v1.40.1/go.mod h1:9fjQZ0mB1LLP0GYrp39oOJXx/I2sxEnZtzCmEQIKvGE=
+modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
+modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
+modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
+modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=

main.go

@@ -3,79 +3,152 @@ package main
 import (
 	"bufio"
 	"bytes"
+	"database/sql"
 	"fmt"
 	"image"
 	"image/jpeg"
 	"log"
+	_ "modernc.org/sqlite"
 	"net/http"
+	"os"
+	"strconv"
 	"strings"
 	"time"
 )
 
-const (
+func getEnv(key, fallback string) string {
-	streamURL = "http://furnace.service:8082/stream"
+	if val, ok := os.LookupEnv(key); ok {
+		return val
+	}
+	return fallback
+}
 
-	// 🔧 TUNE THESE ONCE
+func getEnvInt(key string, fallback int) int {
-	roiX = 1050
+	if val, ok := os.LookupEnv(key); ok {
-	roiY = 760
+		if i, err := strconv.Atoi(val); err == nil {
-	roiW = 60
+			return i
-	roiH = 10
+		}
+	}
+	return fallback
+}
 
-	// Thresholds
+func getEnvDuration(key string, fallback time.Duration) time.Duration {
-	minAvgRed     = 90 // below this → light OFF
+	if val, ok := os.LookupEnv(key); ok {
-	checkInterval = 2 * time.Second
+		if d, err := time.ParseDuration(val); err == nil {
-)
+			return d
+		}
+	}
+	return fallback
+}
+
+type Light struct {
+	Name       string
+	X, Y, W, H int
+	Priority   string // high, default, low, urgent
+}
+
+var lights = map[string]Light{
+	"furnace_power":    {"Furnace Power", 1135, 785, 15, 5, "urgent"},
+	"living_room_stat": {"Living Room Thermostat", 885, 230, 10, 5, "default"},
+	"living_room_heat": {"Living Room Heating", 1395, 224, 10, 5, "default"},
+	"dining_room_stat": {"Dining Room Thermostat", 885, 263, 10, 10, "default"},
+	"dining_room_heat": {"Dining Room Heating", 1395, 267, 10, 5, "default"},
+	"hot_water_stat":   {"Hot Water Thermostat", 880, 440, 10, 5, "default"},
+	"hot_water_heat":   {"Hot Water Heating", 1405, 445, 10, 5, "default"},
+	"first_bed_stat":   {"First Bedroom Thermostat", 880, 480, 10, 5, "default"},
+	"first_bed_heat":   {"First Bedroom Heating", 1407, 480, 10, 5, "default"},
+	"master_bed_stat":  {"Master Bedroom Thermostat", 880, 520, 10, 5, "default"},
+	"master_bed_heat":  {"Master Bedroom Heating", 1418, 540, 10, 5, "default"},
+	"basement_stat":    {"Basement Thermostat", 875, 560, 10, 5, "default"},
+	"basement_heat":    {"Basement Heating", 1410, 560, 10, 5, "default"},
+	"second_bed_stat":  {"Second Bedroom Thermostat", 880, 600, 10, 5, "default"},
+	"second_bed_heat":  {"Second Bedroom Heating", 1412, 600, 10, 5, "default"},
+	"inducer":          {"Inducer", 1415, 645, 10, 5, "default"},
+	"burner":           {"Burner", 1420, 690, 10, 5, "default"},
+	"circulator":       {"Circulator", 1422, 734, 10, 5, "default"},
+}
 
 func main() {
-	fmt.Println("Starting furnace light monitor")
+	fmt.Println("Starting multi-light monitor")
 
-	var prevState bool // false = Off, true = On
+	dbPath := getEnv("LIGHT_DB_PATH", "/var/furnacecheck/lightlog.db")
+	webcamURL := getEnv("WEBCAM_URL", "http://furnace.service:8082/stream")
+	minBrightness := getEnvInt("MIN_BRIGHTNESS", 150)
+	checkInterval := getEnvDuration("CHECK_INTERVAL", 2*time.Second)
+
+	fmt.Println("Using DB:", dbPath)
+	fmt.Println("Using webcam:", webcamURL)
+	fmt.Println("Min Brightness:", minBrightness)
+	fmt.Println("Check Interval:", checkInterval)
+
+	db, err := sql.Open("sqlite", dbPath)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec(`CREATE TABLE IF NOT EXISTS light_checks (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		name TEXT,
+		state TEXT,
+		timestamp DATETIME
+	)`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	prevStates := make(map[string]bool)
 
 	for {
-		on, err := checkOnce()
+		img, err := grabFrame(webcamURL)
 		if err != nil {
-			log.Println("Error:", err)
+			log.Println("Error grabbing frame:", err)
 			time.Sleep(time.Second)
 			continue
 		}
 
-		// Check for state change
+		for key, light := range lights {
-		if on != prevState {
+			on := isLightOn(img, light, minBrightness)
-			if on {
+
-				fmt.Println("RED LIGHT: ON")
+			// Only act if state changed
-			} else {
+			if on != prevStates[key] {
-				fmt.Println("RED LIGHT: OFF")
+				stateStr := onOff(on)
+
+				// Log to SQLite
+				_, err := db.Exec(`INSERT INTO light_checks(name, state, timestamp) VALUES(?, ?, ?)`,
+					key, stateStr, time.Now().UTC())
+				if err != nil {
+					log.Println("Failed to insert into DB:", err)
+				}
+
+				// Notify
+				fmt.Printf("%s: %s\n", light.Name, stateStr)
+				sendNtfyNotification(light, on)
+
+				// Update previous state
+				prevStates[key] = on
 			}
-
-			// Send notification
-			sendNtfyNotification(on)
-
-			prevState = on
 		}
 
 		time.Sleep(checkInterval)
 	}
 }
 
-func checkOnce() (bool, error) {
+func grabFrame(url string) (image.Image, error) {
-	resp, err := http.Get(streamURL)
+	resp, err := http.Get(url)
 	if err != nil {
-		return false, err
+		return nil, err
 	}
 	defer resp.Body.Close()
 
 	reader := bufio.NewReader(resp.Body)
-
+	frame, err := readJPEGFrame(reader)
-	for {
+	if err != nil {
-		frame, err := readJPEGFrame(reader)
+		return nil, err
-		if err != nil {
-			return false, err
-		}
-
-		img, err := jpeg.Decode(bytes.NewReader(frame))
-		return isRedLightOn(img), nil
 	}
 
+	return jpeg.Decode(bytes.NewReader(frame))
 }
 
 func readJPEGFrame(r *bufio.Reader) ([]byte, error) {
@@ -108,38 +181,31 @@ func readJPEGFrame(r *bufio.Reader) ([]byte, error) {
 		}
 		buf.WriteByte(b)
 
-		if buf.Len() > 2 {
+		data := buf.Bytes()
-			data := buf.Bytes()
+		if len(data) > 2 && data[len(data)-2] == 0xFF && data[len(data)-1] == 0xD9 {
-			if data[len(data)-2] == 0xFF && data[len(data)-1] == 0xD9 {
+			return buf.Bytes(), nil
-				return buf.Bytes(), nil
-			}
 		}
 	}
 }
 
-func isRedLightOn(img image.Image) bool {
+func isLightOn(img image.Image, light Light, minBrightness int) bool {
 	bounds := img.Bounds()
 
-	x0 := clamp(roiX, bounds.Min.X, bounds.Max.X)
+	x0 := clamp(light.X, bounds.Min.X, bounds.Max.X)
-	y0 := clamp(roiY, bounds.Min.Y, bounds.Max.Y)
+	y0 := clamp(light.Y, bounds.Min.Y, bounds.Max.Y)
-	x1 := clamp(roiX+roiW, bounds.Min.X, bounds.Max.X)
+	x1 := clamp(light.X+light.W, bounds.Min.X, bounds.Max.X)
-	y1 := clamp(roiY+roiH, bounds.Min.Y, bounds.Max.Y)
+	y1 := clamp(light.Y+light.H, bounds.Min.Y, bounds.Max.Y)
 
-	var redSum int
+	var lumSum float64
 	var count int
 
 	for y := y0; y < y1; y++ {
 		for x := x0; x < x1; x++ {
 			r, g, b, _ := img.At(x, y).RGBA()
-			red := int(r >> 8)
+			r8, g8, b8 := int(r>>8), int(g>>8), int(b>>8)
-			green := int(g >> 8)
+			lum := 0.299*float64(r8) + 0.587*float64(g8) + 0.114*float64(b8)
-			blue := int(b >> 8)
+			lumSum += lum
-
+			count++
-			// ensure it's "red", not white glare
-			if red > 100 && red > green+30 && red > blue+30 {
-				redSum += red
-				count++
-			}
 		}
 	}
 
@@ -147,8 +213,8 @@ func isRedLightOn(img image.Image) bool {
 		return false
 	}
 
-	avgRed := redSum / count
+	avgLum := lumSum / float64(count)
-	return avgRed > minAvgRed
+	return avgLum > float64(minBrightness)
 }
 
 func clamp(v, min, max int) int {
@@ -161,21 +227,24 @@ func clamp(v, min, max int) int {
 	return v
 }
 
-func sendNtfyNotification(on bool) {
+func onOff(on bool) string {
-	state := "OFF"
 	if on {
-		state = "ON"
+		return "ON"
 	}
+	return "OFF"
+}
 
+func sendNtfyNotification(light Light, on bool) {
+	state := onOff(on)
 	url := "https://ntfy.unbl.ink/furnace"
-	body := bytes.NewBufferString(state)
+	body := bytes.NewBufferString(fmt.Sprintf("%s: %s", light.Name, state))
 	req, err := http.NewRequest("POST", url, body)
 	if err != nil {
 		log.Println("Failed to create request:", err)
 		return
 	}
-	req.Header.Set("Title", "Furnace Power")
+	req.Header.Set("Title", "Light State Change")
-	req.Header.Set("Priority", "high")
+	req.Header.Set("Priority", light.Priority)
 
 	client := &http.Client{Timeout: 5 * time.Second}
 	resp, err := client.Do(req)