From 85cd9607046f3bda721a1ae860b58025202b15d9 Mon Sep 17 00:00:00 2001
From: CloneTV <63013123+CloneTV@users.noreply.github.com>
Date: Fri, 16 Oct 2020 13:26:01 +0300
Subject: [PATCH 1/3] Update PCF8574.h

---
 PCF8574.h | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/PCF8574.h b/PCF8574.h
index b379a3a..11b22cb 100644
--- a/PCF8574.h
+++ b/PCF8574.h
@@ -43,9 +43,6 @@
 #include "WProgram.h"
 #endif
 
-#define DEFAULT_SDA SDA;
-#define DEFAULT_SCL SCL;
-
 // Uncomment to enable printing out nice debug messages.
 // #define PCF8574_DEBUG
 
@@ -170,11 +167,27 @@ public:
 private:
 	uint8_t _address;
 
-	#ifdef __STM32F1__
-	#ifndef SDA
-	#define DEFAULT_SDA PB7
-	#define DEFAULT_SCL PB6
+	#if !defined(DEFAULT_SDA)
+	#  if defined(__STM32F1__)
+	#    define DEFAULT_SDA PB7
+	#  elif defined(ESP8266)
+	#    define DEFAULT_SDA 4
+	#  elif defined(SDA)
+	#    define DEFAULT_SDA SDA
+	#  else
+	#    error "Error define DEFAULT_SDA, SDA not declared"
+	#  endif
 	#endif
+	#if !defined(DEFAULT_SCL)
+	#  if defined(__STM32F1__)
+	#    define DEFAULT_SCL PB6
+	#  elif defined(ESP8266)
+	#    define DEFAULT_SCL 5
+	#  elif defined(SDA)
+	#    define DEFAULT_SCL SCL
+	#  else
+	#    error "Error define DEFAULT_SCL, SCL not declared"
+	#  endif
 	#endif
 
 	uint8_t _sda = DEFAULT_SDA

From 46e72ba75ce94416ff4a457a3fad97704df91a86 Mon Sep 17 00:00:00 2001
From: CloneTV <63013123+CloneTV@users.noreply.github.com>
Date: Fri, 16 Oct 2020 13:26:25 +0300
Subject: [PATCH 2/3] Update PCF8574.h

---
 PCF8574.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/PCF8574.h b/PCF8574.h
index 11b22cb..77257e6 100644
--- a/PCF8574.h
+++ b/PCF8574.h
@@ -190,10 +190,8 @@ private:
 	#  endif
 	#endif
 
-	uint8_t _sda = DEFAULT_SDA
-	;
-	uint8_t _scl = DEFAULT_SCL
-	;
+	uint8_t _sda = DEFAULT_SDA;
+	uint8_t _scl = DEFAULT_SCL;
 
 	TwoWire *_wire;
 

From 74556f01d76827a512956b4dedb2ddf309ba891d Mon Sep 17 00:00:00 2001
From: CloneTV <63013123+CloneTV@users.noreply.github.com>
Date: Fri, 16 Oct 2020 13:31:39 +0300
Subject: [PATCH 3/3] Update PCF8574.h

---
 PCF8574.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/PCF8574.h b/PCF8574.h
index 77257e6..6b095bb 100644
--- a/PCF8574.h
+++ b/PCF8574.h
@@ -229,3 +229,4 @@ private:
 };
 
 #endif
+