Update README.md

feer9 · feer9 · commit c7fc4f05ee8e · 2022-03-20T16:48:26.000-03:00
diff --git a/README.md b/README.md
@@ -18,6 +18,9 @@ STM32F103  | Function
 PB10       |   SCL  
 PB11       |   SDA  
 
+**Important note:**  
+Aditionally, a 10k pullup resistor to Vcc is required in both SDA and SCL.
+
 ## Memory
 Supported I2C memories are:
 
