From 157bb65054442bc0a72b0ffbb61ae20c96a6f97e Mon Sep 17 00:00:00 2001
From: Maxthon Chan <xcvista@me.com>
Date: Fri, 17 Mar 2017 10:01:35 +0800
Subject: [PATCH 1/2] Added support to secondary I2C interfaces

---
 i2cdetect.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/i2cdetect.h b/i2cdetect.h
index 6bd99f6..fe96dd8 100644
--- a/i2cdetect.h
+++ b/i2cdetect.h
@@ -1,8 +1,12 @@
+/*
+i2cdetect.h - Arduino library for scanning I2C bus for devices
+*/
 
 #ifndef __I2CDETECT_H_
 #define __I2CDETECT_H_
 
-void i2cdetect(uint8_t first, uint8_t last);
-void i2cdetect();
+#include <Wire.h>
+
+void i2cdetect(TwoWire &wire = Wire, uint8_t first = 0x03, uint8_t last = 0x77);
 
 #endif

From ec9d1c45ab80d84c140201949a3cead2aa49d63d Mon Sep 17 00:00:00 2001
From: Maxthon Chan <xcvista@me.com>
Date: Fri, 17 Mar 2017 10:03:02 +0800
Subject: [PATCH 2/2] Added support for secondary I2C interfaces

---
 i2cdetect.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/i2cdetect.cpp b/i2cdetect.cpp
index a933781..43def84 100644
--- a/i2cdetect.cpp
+++ b/i2cdetect.cpp
@@ -21,7 +21,7 @@ void _printf(const char *format, ...)
   va_end(ap);
 }
 
-void i2cdetect(uint8_t first, uint8_t last) {
+void i2cdetect(TwoWire &wire, uint8_t first, uint8_t last) {
   uint8_t i, j, address, error;
 
   // header
@@ -36,8 +36,8 @@ void i2cdetect(uint8_t first, uint8_t last) {
     for (i = 0; i < 16; i++) {
       address = i + j*16;
       if (address >= first && address <= last) {
-        Wire.beginTransmission(address);
-        error = Wire.endTransmission();
+        wire.beginTransmission(address);
+        error = wire.endTransmission();
         if (error) {
           Serial.print(" --");
         } else {