diff --git a/README.md b/README.md
index 26a1715..8496f40 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,9 @@ esptool.py --chip esp8266 --port <where usb serial adapter is connected> --baud
 ```
 
 
+#### UART Pinout
+<img src="/doc/uart_pinout.jpg" width=350/>
+
 
 #### Baudrates
 
@@ -72,4 +75,4 @@ Device outputs debug messages to the console port, which can be read by connecti
 
 #### HTTP REST API
 
-The device offers HTTP API, description of that API is available at `http://<button_ip>/help`
\ No newline at end of file
+The device offers HTTP API, description of that API is available at `http://<button_ip>/help`
diff --git a/doc/uart_pinout.jpg b/doc/uart_pinout.jpg
new file mode 100644
index 0000000..fab9062
Binary files /dev/null and b/doc/uart_pinout.jpg differ