基本逻辑完成

pkg/relay/relay.go

@@ -0,0 +1,44 @@
+package relay
+
+import (
+	"bufio"
+	"fmt"
+	"go.bug.st/serial"
+	"io"
+)
+
+type Device struct {
+	port serial.Port
+}
+
+func (r *Device) Close() error {
+	return r.port.Close()
+}
+
+func (r *Device) On(num int) error {
+	_, err := io.WriteString(r.port, fmt.Sprintf("AT+OUT%v+1=ON\r\n", num))
+	return err
+}
+
+func (r *Device) Off(num int) error {
+	_, err := io.WriteString(r.port, fmt.Sprintf("AT+OUT%v+1=OFF\r\n", num))
+	return err
+}
+
+func New(portName string, reader func(msg string)) (*Device, error) {
+	port, err := serial.Open(portName, &serial.Mode{
+		BaudRate: 9600,
+		DataBits: 8,
+	})
+	if err != nil {
+		return nil, err
+	}
+	go func() {
+		for {
+			r := bufio.NewReader(port)
+			line, _, _ := r.ReadLine()
+			reader(string(line))
+		}
+	}()
+	return &Device{port: port}, nil
+}