diff --git a/src/i2cscan.cpp b/src/i2cscan.cpp
index e3deb9f0..7ce0f6b0 100644
--- a/src/i2cscan.cpp
+++ b/src/i2cscan.cpp
@@ -14,12 +14,7 @@ int i2c_scan(void) {
 
   for (addr = 8; addr <= 119; addr++) {
 
-// scan i2c bus with no more to 100KHz
-#ifdef HAS_DISPLAY
-    Wire.begin(MY_OLED_SDA, MY_OLED_SCL, 100000);
-#else
-    Wire.begin(SDA, SCL, 100000);
-#endif
+    // scan i2c bus with no more to 100KHz
     Wire.beginTransmission(addr);
     Wire.write(addr);
     i2c_ret = Wire.endTransmission();
diff --git a/src/main.cpp b/src/main.cpp
index 2c5fc606..2937f793 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -169,6 +169,13 @@ void setup() {
   ESP_LOGI(TAG, "TinyGPS+ version %s", TinyGPSPlus::libraryVersion());
 #endif
 
+// open i2c bus
+#ifdef HAS_DISPLAY
+  Wire.begin(MY_OLED_SDA, MY_OLED_SCL, 100000);
+#else
+  Wire.begin(SDA, SCL, 100000);
+#endif
+
 // setup power on boards with power management logic
 #ifdef EXT_POWER_SW
   pinMode(EXT_POWER_SW, OUTPUT);
@@ -180,6 +187,7 @@ void setup() {
   strcat_P(features, " PMU");
 #endif
 
+  // scan i2c bus for devices
   i2c_scan();
 
 #endif // verbose