diff --git a/en/serial_pins_uart.md b/en/serial_pins_uart.md
index 191f113..f9ad29e 100644
--- a/en/serial_pins_uart.md
+++ b/en/serial_pins_uart.md
@@ -1,6 +1,13 @@
 # Serial UATR pin description  
 
-## T31 -- Rebranding of wyze cam pan v3 
+## Quick test 
+Config seial port ->  8N1 Baud rate 115200
+
+This is a quick test. Ground to ground, tx from the adapter is not connected, rx probes pads and you check output in the terminal app.
+
+## Cameras UART pins  
+
+### T31 -- Rebranding of wyze cam pan v3 
 
 ![](../images/T31_rebranding_wyze_cam_pan_v3.jpeg)