From f3d3706333236789cbcfbd35897a9d251a4f21d7 Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Mon, 1 Jun 2015 00:19:20 +0200
Subject: [PATCH] pass on att read data len

---
 platforms/arduino/BTstack.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platforms/arduino/BTstack.cpp b/platforms/arduino/BTstack.cpp
index d89dc2a21..94a18d441 100644
--- a/platforms/arduino/BTstack.cpp
+++ b/platforms/arduino/BTstack.cpp
@@ -533,7 +533,7 @@ static int (*gattWriteCallback)(uint16_t characteristic_id, uint8_t *buffer, uin
 // @param offset defines start of attribute value
 static uint16_t att_read_callback(uint16_t con_handle, uint16_t att_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){
     if (gattReadCallback){
-        gattReadCallback(att_handle, buffer, buffer_size);
+        return gattReadCallback(att_handle, buffer, buffer_size);
     }
     return 0;
 }