diff --git a/README.md b/README.md
index 5cc7a26..ff916ca 100644
--- a/README.md
+++ b/README.md
@@ -22,15 +22,14 @@ DC          | IO27      |
 RST         | IO33      |
 GND         |           |
 
-
 ### BME680
 
 I2C
 
 BME680 pin | ESP32 pin | Notes
 -----------|-----------|----------
-VCC        |           |
-GND        |           |
+VCC        | 3V        |
+GND        | GND       |
 SCL        | IO22      |
 SDA        | IO21      |
 SDO        | nc        | SPI only
@@ -42,23 +41,20 @@ I2C
 
 GY-302 pin  | ESP32 pin | Notes
 -----------|-----------|----------
-VCC        |           |
-GND        |           |
+VCC        | 3V        |
+GND        | GND       |
 SCL        | IO22      |
 SDA        | IO21      |
 ADDR       | nc        | select addr: GND: 0x23 or VCC: 0x5C
 
-
-
-
 ### VEML6075
 
 I2C
 
 GY-VEML6075 pin  | ESP32 pin | Notes
 -----------|-----------|----------
-VIN        |           |
-GND        |           |
+VIN        | 3V        |
+GND        | GND       |
 SCL        | IO22      |
 SDA        | IO21      |
 
@@ -72,7 +68,7 @@ TXD        | IO16      |
 RXD        | IO17      |
 GND        | GND       |
 25µm       | nc        |
-5V         | VUSB      |
+5V         | VUSB      | 5V
 1µm        | nc        |
 NC         | nc        |