diff --git a/micropython/modules/breakout_as7262/breakout_as7262.cpp b/micropython/modules/breakout_as7262/breakout_as7262.cpp
index deecafc3..a0dd8621 100644
--- a/micropython/modules/breakout_as7262/breakout_as7262.cpp
+++ b/micropython/modules/breakout_as7262/breakout_as7262.cpp
@@ -62,7 +62,7 @@ mp_obj_t BreakoutAS7262_make_new(const mp_obj_type_t *type, size_t n_args, size_
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_dotmatrix/breakout_dotmatrix.cpp b/micropython/modules/breakout_dotmatrix/breakout_dotmatrix.cpp
index 0f961745..f8205c37 100644
--- a/micropython/modules/breakout_dotmatrix/breakout_dotmatrix.cpp
+++ b/micropython/modules/breakout_dotmatrix/breakout_dotmatrix.cpp
@@ -65,7 +65,7 @@ mp_obj_t BreakoutDotMatrix_make_new(const mp_obj_type_t *type, size_t n_args, si
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_encoder/breakout_encoder.cpp b/micropython/modules/breakout_encoder/breakout_encoder.cpp
index 8b8fe3de..8d30b1bc 100644
--- a/micropython/modules/breakout_encoder/breakout_encoder.cpp
+++ b/micropython/modules/breakout_encoder/breakout_encoder.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutEncoder_make_new(const mp_obj_type_t *type, size_t n_args, size
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_ioexpander/breakout_ioexpander.cpp b/micropython/modules/breakout_ioexpander/breakout_ioexpander.cpp
index ef4135aa..272405be 100644
--- a/micropython/modules/breakout_ioexpander/breakout_ioexpander.cpp
+++ b/micropython/modules/breakout_ioexpander/breakout_ioexpander.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutIOExpander_make_new(const mp_obj_type_t *type, size_t n_args, s
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_ltr559/breakout_ltr559.cpp b/micropython/modules/breakout_ltr559/breakout_ltr559.cpp
index 1130c83a..645df5a1 100644
--- a/micropython/modules/breakout_ltr559/breakout_ltr559.cpp
+++ b/micropython/modules/breakout_ltr559/breakout_ltr559.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutLTR559_make_new(const mp_obj_type_t *type, size_t n_args, size_
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_mics6814/breakout_mics6814.cpp b/micropython/modules/breakout_mics6814/breakout_mics6814.cpp
index 800a5440..5579c016 100644
--- a/micropython/modules/breakout_mics6814/breakout_mics6814.cpp
+++ b/micropython/modules/breakout_mics6814/breakout_mics6814.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutMICS6814_make_new(const mp_obj_type_t *type, size_t n_args, siz
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_msa301/breakout_msa301.cpp b/micropython/modules/breakout_msa301/breakout_msa301.cpp
index 7f7db729..a59628ef 100644
--- a/micropython/modules/breakout_msa301/breakout_msa301.cpp
+++ b/micropython/modules/breakout_msa301/breakout_msa301.cpp
@@ -62,7 +62,7 @@ mp_obj_t BreakoutMSA301_make_new(const mp_obj_type_t *type, size_t n_args, size_
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_potentiometer/breakout_potentiometer.cpp b/micropython/modules/breakout_potentiometer/breakout_potentiometer.cpp
index 5cbfb3e3..2812a161 100644
--- a/micropython/modules/breakout_potentiometer/breakout_potentiometer.cpp
+++ b/micropython/modules/breakout_potentiometer/breakout_potentiometer.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutPotentiometer_make_new(const mp_obj_type_t *type, size_t n_args
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_rgbmatrix5x5/breakout_rgbmatrix5x5.cpp b/micropython/modules/breakout_rgbmatrix5x5/breakout_rgbmatrix5x5.cpp
index d2531281..3057e507 100644
--- a/micropython/modules/breakout_rgbmatrix5x5/breakout_rgbmatrix5x5.cpp
+++ b/micropython/modules/breakout_rgbmatrix5x5/breakout_rgbmatrix5x5.cpp
@@ -65,7 +65,7 @@ mp_obj_t BreakoutRGBMatrix5x5_make_new(const mp_obj_type_t *type, size_t n_args,
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_rtc/breakout_rtc.cpp b/micropython/modules/breakout_rtc/breakout_rtc.cpp
index 4c55b897..d36df64d 100644
--- a/micropython/modules/breakout_rtc/breakout_rtc.cpp
+++ b/micropython/modules/breakout_rtc/breakout_rtc.cpp
@@ -65,7 +65,7 @@ mp_obj_t BreakoutRTC_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_sgp30/breakout_sgp30.cpp b/micropython/modules/breakout_sgp30/breakout_sgp30.cpp
index 590c6c14..7812b4a1 100644
--- a/micropython/modules/breakout_sgp30/breakout_sgp30.cpp
+++ b/micropython/modules/breakout_sgp30/breakout_sgp30.cpp
@@ -58,7 +58,7 @@ mp_obj_t BreakoutSGP30_make_new(const mp_obj_type_t *type, size_t n_args, size_t
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);
diff --git a/micropython/modules/breakout_trackball/breakout_trackball.cpp b/micropython/modules/breakout_trackball/breakout_trackball.cpp
index 357b9a7a..81b23f3c 100644
--- a/micropython/modules/breakout_trackball/breakout_trackball.cpp
+++ b/micropython/modules/breakout_trackball/breakout_trackball.cpp
@@ -69,7 +69,7 @@ mp_obj_t BreakoutTrackball_make_new(const mp_obj_type_t *type, size_t n_args, si
     int scl = args[ARG_scl].u_int;
 
     if(i2c_id == -1) {
-        i2c_id = sda & 1;
+        i2c_id = (sda >> 1) & 0b1;  // If no i2c specified, choose the one for the given SDA pin
     }
     if(i2c_id < 0 || i2c_id > 1) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("I2C(%d) doesn't exist"), i2c_id);