reduce max frames

cmd/rv/main.go

@@ -107,7 +107,7 @@ const (
 	profilePath      = "rv.prof"
 	pkg              = "rv: "
 	runPreDelay      = 20 * time.Second
-	maxImages        = 10 // Max number of images read when evaluating turbidity.
+	maxImages        = 1 // Max number of images read when evaluating turbidity.
 )
 
 // Software define pin values.
@@ -189,12 +189,14 @@ func (tp *turbidityProbe) Write(p []byte) (int, error) {
 			imgs = append(imgs, img.Clone())
 		}
 		if len(imgs) <= 0 {
-			tp.log.Log(logger.Info, "no frames found")
+			tp.log.Log(logger.Warning, "no frames found", "error", err.Error())
 			return len(p), nil
 		}
+		tp.log.Log(logger.Debug, "found frames", "frames", len(imgs))
 
 		// Process video data to get saturation and contrast scores.
 		res, err := tp.ts.Evaluate(imgs)
+		tp.log.Log(logger.Debug, "finished evaluation")
 		if err != nil {
 			tp.log.Error("evaluate failed", "error", err.Error())
 			return len(p), err
@@ -240,7 +242,7 @@ func main() {
 		rv *revid.Revid
 		p  *turbidityProbe
 	)
-	p, err := NewTurbidityProbe(*log, 60*time.Second)
+	p, err := NewTurbidityProbe(*log, 120*time.Second)
 
 	log.Log(logger.Debug, "initialising netsender client")
 	ns, err := netsender.New(log, nil, readPin(p, rv, log), nil, createVarMap())