Split out ultrasonic2relay

ultrasonic2relay/main.go

@@ -0,0 +1,29 @@
+package main
+
+import "context"
+import "fmt"
+
+import "github.com/firestuff/hh/hhio"
+
+func main() {
+	err := hhio.Open()
+	if err != nil {
+		panic(err)
+	}
+	defer hhio.Close()
+
+	us := hhio.NewUltrasonic(context.Background(), 6, 5)
+	mf := hhio.NewMedianFilter(us.C, 47)
+
+  r := hhio.NewRelay(21)
+
+	for dist := range mf {
+		fmt.Printf("%f\n", dist)
+
+    if dist < 50 {
+      r.On()
+    } else if dist > 70 {
+      r.Off()
+    }
+	}
+}