From 2af04c43eac7cef50eeb3d7725b5cdca563d3525 Mon Sep 17 00:00:00 2001
From: Kreg Hanning <khanning@gmail.com>
Date: Tue, 17 Jul 2018 16:09:12 -0400
Subject: [PATCH] Ignore display command with blank string (#1355)

---
 src/extensions/scratch3_microbit/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/extensions/scratch3_microbit/index.js b/src/extensions/scratch3_microbit/index.js
index 89dbd7799..698b81996 100644
--- a/src/extensions/scratch3_microbit/index.js
+++ b/src/extensions/scratch3_microbit/index.js
@@ -527,7 +527,7 @@ class Scratch3MicroBitBlocks {
      */
     displayText (args) {
         const text = String(args.TEXT).substring(0, 19);
-        this._device.displayText(text);
+        if (text.length > 0) this._device.displayText(text);
         return Promise.resolve();
     }