From 8cc661923b04e098d709ccad967895de08c3d2d6 Mon Sep 17 00:00:00 2001
From: HuangRui <vowstar@gmail.com>
Date: Sat, 31 Jan 2015 10:46:43 +0800
Subject: [PATCH] The read function returns an incorrect temperature. Fixed
 #149.

---
 lua_modules/ds18b20/ds18b20.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua_modules/ds18b20/ds18b20.lua b/lua_modules/ds18b20/ds18b20.lua
index bc1b1c99..dba2ee46 100644
--- a/lua_modules/ds18b20/ds18b20.lua
+++ b/lua_modules/ds18b20/ds18b20.lua
@@ -126,7 +126,7 @@ function read(addr, unit)
   if((t1 == nil ) or (t2 ==nil)) then
     return nil
   else
-    return t1.."."..t2
+    return t1.."."..string.format("%04u", t2)
   end
 end