diff --git a/README.md b/README.md
index d5c6239..f548ae2 100644
--- a/README.md
+++ b/README.md
@@ -54,3 +54,5 @@ nano /home/tuyactl/env.py
 ```
 python3 /home/tuyactl/Zigbee_Doorlock.py
 ```
+
+5. Send MQTT message to topic `TuyaLock/Doorlock` with payload `unlock_door`
\ No newline at end of file