diff --git a/admin/tbm.go b/admin/tbm.go
index d4cb6d7..e56e95a 100644
--- a/admin/tbm.go
+++ b/admin/tbm.go
@@ -5,6 +5,7 @@ import (
 	"io"
 	"log"
 	"strings"
+	"time"
 
 	"github.com/tarm/serial"
 )
@@ -127,6 +128,7 @@ func handleResults(in io.Reader, c chan *Result) {
 
 func serialise(out io.Writer, command string, args []string, payload []byte) error {
 	var quoted_args []string
+	var err error
 
 	quoted_args = append(quoted_args, command)
 
@@ -139,18 +141,23 @@ func serialise(out io.Writer, command string, args []string, payload []byte) err
 	output := []byte(out_string)
 	output = append(output, '\r')
 
-	if payload != nil {
-		output = append(output, payload...)
-		output = append(output, 0x4)
-	}
-
-	_, err := out.Write(output)
+	_, err = out.Write(output)
 	// err is non nil if n != len(output)
 	if err != nil {
 		return err
 	}
 
-	return nil
+	if payload == nil {
+		return nil
+	}
+
+	// FIXME: wait for command to finish
+	time.Sleep(time.Second)
+
+	output = append(payload, 0x4)
+	_, err = out.Write(output)
+
+	return err
 }
 
 func handleCommands(out io.Writer, c chan *Command) {