From 23e778caedeaacaee529b2d7d4d29c437136030d Mon Sep 17 00:00:00 2001
From: unknown <hundemeier99@gmail.com>
Date: Thu, 10 May 2018 14:27:40 +0200
Subject: [PATCH] readLCD blocking added

---
 go/server.go       | 11 ++++++++++-
 go/static/index.js |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/go/server.go b/go/server.go
index 5f56bdc..27392a9 100644
--- a/go/server.go
+++ b/go/server.go
@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"time"
 
 	"github.com/Hundemeier/go-sacn/sacn"
 
@@ -133,7 +134,15 @@ type lcd struct {
 	Second string //`json:"second"`
 }
 
+var readLCDLock = false
+
 func readLCD(port io.ReadWriteCloser) lcd {
+	for readLCDLock {
+		//wait unitl the lock is over
+		time.Sleep(10 * time.Millisecond)
+	}
+	readLCDLock = true
+
 	result := lcd{}
 	//Attemp to read the first line
 	writeBytes(port, createBytes(projAddr, []byte{0x7a, 0x02}, []byte{0, 0}))
@@ -156,7 +165,7 @@ func readLCD(port io.ReadWriteCloser) lcd {
 			break
 		}
 	}
-
+	readLCDLock = false
 	return result
 }
 
diff --git a/go/static/index.js b/go/static/index.js
index 25087d2..ddc23ad 100644
--- a/go/static/index.js
+++ b/go/static/index.js
@@ -16,6 +16,7 @@ function apirequest(cmd, opt) {
         method: 'GET',
         credentials: 'same-origin',
     })
+    readLCD();
 }
 
 function readLCD() {