From 735277fff97b0cf392346477428e7e9e8288a5fa Mon Sep 17 00:00:00 2001
From: ficeto <ficeto@Hristos-Mac-mini-2.local>
Date: Sun, 3 May 2015 20:35:01 +0300
Subject: [PATCH] ACK is actually 0

---
 cores/esp8266/core_esp8266_si2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/esp8266/core_esp8266_si2c.c b/cores/esp8266/core_esp8266_si2c.c
index e53707df7..29149aa09 100644
--- a/cores/esp8266/core_esp8266_si2c.c
+++ b/cores/esp8266/core_esp8266_si2c.c
@@ -131,7 +131,7 @@ static bool twi_write_byte(unsigned char byte) {
     twi_write_bit(byte & 0x80);
     byte <<= 1;
   }
-  return twi_read_bit();//NACK/ACK
+  return !twi_read_bit();//NACK/ACK
 }
 
 static unsigned char twi_read_byte(bool nack) {