examples: add notecard-basics example similar to Python/C repos

examples/notecard-basics/main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/blues/note-go/notecard"
+)
+
+const productUID = "com.your-company.your-project"
+
+var (
+	card *notecard.Context
+)
+
+func main() {
+	var err error
+	card, err = notecard.Open(cardInterface, port, speed)
+	if err != nil {
+		println(err)
+		return
+	}
+
+	configure()
+
+	for {
+		temp, voltage, err := temperatureAndVoltage()
+		if err != nil {
+			fmt.Printf("Error: %v\n", err)
+			time.Sleep(1 * time.Second)
+			continue
+		} else {
+			fmt.Printf("Temperature: %f, Voltage: %f\n", temp, voltage)
+		}
+
+		err = addNote(temp, voltage)
+		if err != nil {
+			fmt.Printf("Error: %v\n", err)
+		}
+
+		fmt.Println("Note added")
+
+		time.Sleep(5 * time.Second)
+	}
+}
+
+func configure() error {
+	req := notecard.Request{Req: notecard.ReqHubSet, ProductUID: productUID, Mode: "continuous"}
+	_, err := card.TransactionRequest(req)
+
+	return err
+}
+
+func temperatureAndVoltage() (float64, float64, error) {
+	rsp, err := card.TransactionRequest(notecard.Request{Req: notecard.ReqCardTemp})
+	if err != nil {
+		return 0, 0, err
+	}
+
+	temp := rsp.Value
+
+	rsp, err = card.TransactionRequest(notecard.Request{Req: notecard.ReqCardVoltage})
+	if err != nil {
+		return 0, 0, err
+	}
+
+	voltage := rsp.Value
+
+	return temp, voltage, nil
+}
+
+func addNote(temp float64, voltage float64) error {
+	data := map[string]interface{}{"temp": temp, "voltage": voltage}
+	_, err := card.TransactionRequest(notecard.Request{Req: notecard.ReqNoteAdd, Body: &data, Sync: true})
+
+	return err
+}

examples/notecard-basics/os.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"github.com/blues/note-go/notecard"
+)
+
+var (
+	port          string
+	speed         int
+	cardInterface = "serial"
+)
+
+func init() {
+	_, port, speed = notecard.Defaults()
+}