diff --git a/README.md b/README.md
index 5ec9c82..5cc7a26 100644
--- a/README.md
+++ b/README.md
@@ -36,23 +36,26 @@ SDA        | IO21      |
 SDO        | nc        | SPI only
 CS         | nc        | SPI only
 
-### BH1750 (GY-30)
+### BH1750 (GY-302)
 
 I2C
 
-GY-30 pin  | ESP32 pin | Notes
+GY-302 pin  | ESP32 pin | Notes
 -----------|-----------|----------
+VCC        |           |
 GND        |           |
-AD0        | nc        |
-SDA        | IO21      |
 SCL        | IO22      |
-VCC        |           |
+SDA        | IO21      |
+ADDR       | nc        | select addr: GND: 0x23 or VCC: 0x5C
+
+
+
 
 ### VEML6075
 
 I2C
 
-GY-30 pin  | ESP32 pin | Notes
+GY-VEML6075 pin  | ESP32 pin | Notes
 -----------|-----------|----------
 VIN        |           |
 GND        |           |
diff --git a/src/main.cpp b/src/main.cpp
index 5f51e88..d4580ff 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -536,6 +536,8 @@ void setup()
 
   if (lightMeter.begin()) {
     light_active = true;
+  } else {
+    Serial.println("Failed to communicate with BH1750 sensor, check wiring?");
   }
 
   sds.begin();