From c28fd391a4631ea8d63b6e1134f9156672af9f6e Mon Sep 17 00:00:00 2001
From: eye <34344989+naveen-nayan@users.noreply.github.com>
Date: Thu, 6 Feb 2025 15:11:27 +0530
Subject: [PATCH 1/2] Update I2C_Slave.cpp

- Added pin assignment for I2C if alternate pins are used.
- Added new TwoWire object to overcome conflict with default object.
---
 src/I2C_Slave.cpp | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/src/I2C_Slave.cpp b/src/I2C_Slave.cpp
index f7c79f5..5e3d66d 100644
--- a/src/I2C_Slave.cpp
+++ b/src/I2C_Slave.cpp
@@ -23,6 +23,10 @@
 volatile uint32_t _numErrors = 0;
 void (*I2C_Slave::_user_onCommand)(uint8_t, uint8_t){};
 
+// create a new wire object
+TwoWire new_Wire = TwoWire();
+
+
 // Constructors ////////////////////////////////////////////////////////////////
 
 I2C_Slave::I2C_Slave() {}
@@ -30,9 +34,9 @@ I2C_Slave::I2C_Slave() {}
 // Public Methods //////////////////////////////////////////////////////////////
 
 void I2C_Slave::begin() {
-    Wire.begin(_addr);
-    Wire.onRequest(_onRequest);
-    Wire.onReceive(_onReceive);
+    new_Wire.begin(_addr);
+    new_Wire.onRequest(_onRequest);
+    new_Wire.onReceive(_onReceive);
 }
 
 void I2C_Slave::begin(uint8_t addr) {
@@ -40,6 +44,14 @@ void I2C_Slave::begin(uint8_t addr) {
     this->begin();
 }
 
+// assign the pin if alternate I2C is used esle assign default pin
+void I2C_Slave::begin(uint8_t addr, uint32_t sda = SDA, uint32_t scl = SCL) {
+    new_Wire.setSDA(sda);
+    new_Wire.setSCL(scl);
+    _addr = addr;
+    this->begin();
+}
+
 // return the number of I2C comm errors encountered
 uint32_t I2C_Slave::numErrors() { return _numErrors; }
 
@@ -66,11 +78,11 @@ size_t I2C_Slave::writeRegisters(char* buf) {
 
 void I2C_Slave::_onRequest() {
     uint8_t idx = 0;
-    if (Wire.available()) {
-        idx = Wire.read();
+    if (new_Wire.available()) {
+        idx = new_Wire.read();
         if (idx > BUFFER_LENGTH - 1) idx = 0;
     }
-    Wire.write(_registers[idx]);
+    new_Wire.write(_registers[idx]);
 }
 
 void I2C_Slave::_onReceive(int size) {
@@ -78,15 +90,15 @@ void I2C_Slave::_onReceive(int size) {
 
     if (size > 2) {
         // assume an error on more than 2 bytes - flush read buffer
-        while (Wire.available()) Wire.read();
+        while (new_Wire.available()) new_Wire.read();
         _numErrors++;
         return;
     }
 
     // otherwise, two bytes indicate a command, pass to user function
     uint8_t b0, b1;
-    b0 = Wire.read();
-    b1 = Wire.read();
+    b0 = new_Wire.read();
+    b1 = new_Wire.read();
     _user_onCommand(b0, b1);
 }
 

From 9f8701d3b73b984051fa92894caa886675a0e4db Mon Sep 17 00:00:00 2001
From: eye <34344989+naveen-nayan@users.noreply.github.com>
Date: Thu, 6 Feb 2025 15:14:33 +0530
Subject: [PATCH 2/2] Update I2C_Slave.h

- added function declarations.
---
 src/I2C_Slave.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/I2C_Slave.h b/src/I2C_Slave.h
index 4b6f902..0688f30 100644
--- a/src/I2C_Slave.h
+++ b/src/I2C_Slave.h
@@ -45,6 +45,7 @@ class I2C_Slave {
     I2C_Slave();
     void begin();
     void begin(uint8_t);
+    void begin(uint8_t addr, uint32_t sda, uint32_t scl);
     uint32_t numErrors();
     size_t numRegisters();
     void onCommand(void (*)(uint8_t, uint8_t));