Create packages with numbers more efficiently as well

remote/commands.go

@@ -5,8 +5,6 @@ import (
 	"net"
 )
 
-const commandFormat = "-%s.%s\r"
-
 // Control implements remote IP control of supported Hegel amplifiers.
 type Control struct {
 	conn io.ReadWriteCloser

remote/reset.go

@@ -1,14 +1,17 @@
 package remote
 
 import (
-	"fmt"
 	"strconv"
 )
 
 // SetResetDelay sets a timeout, in minutes, for when to reset.
 func (c *Control) SetResetDelay(delay uint8) error {
-	number := strconv.FormatUint(uint64(delay), 10)
-	_, err := fmt.Fprintf(c.conn, commandFormat, "r", number)
+	packet := make([]byte, 0, 7)
+	packet = append(packet, "-r."...)
+	packet = strconv.AppendUint(packet, uint64(delay), 10)
+	packet = append(packet, '\r')
+
+	_, err := c.conn.Write(packet)
 	if err != nil {
 		return err
 	}

remote/source.go

@@ -2,7 +2,6 @@ package remote
 
 import (
 	"errors"
-	"fmt"
 	"strconv"
 
 	"github.com/Jacalz/hegelmote/device"
@@ -29,8 +28,12 @@ func (c *Control) SetSourceNumber(number uint) error {
 		return errSorceInputIsZero
 	}
 
-	parameter := strconv.FormatUint(uint64(number), 10)
-	_, err := fmt.Fprintf(c.conn, commandFormat, "i", parameter)
+	packet := make([]byte, 0, 7)
+	packet = append(packet, "-i."...)
+	packet = strconv.AppendUint(packet, uint64(number), 10)
+	packet = append(packet, '\r')
+
+	_, err := c.conn.Write(packet)
 	if err != nil {
 		return err
 	}

remote/volume.go

@@ -2,7 +2,6 @@ package remote
 
 import (
 	"errors"
-	"fmt"
 	"strconv"
 )
 
@@ -14,8 +13,12 @@ func (c *Control) SetVolume(percentage uint8) error {
 		return errInvalidPercentage
 	}
 
-	value := strconv.FormatUint(uint64(percentage), 10)
-	_, err := fmt.Fprintf(c.conn, commandFormat, "v", value)
+	packet := make([]byte, 0, 7)
+	packet = append(packet, "-v."...)
+	packet = strconv.AppendUint(packet, uint64(percentage), 10)
+	packet = append(packet, '\r')
+
+	_, err := c.conn.Write(packet)
 	if err != nil {
 		return err
 	}