chore: Fix bug preventing multiple RGB commands from being sent

app.py

@@ -43,9 +43,11 @@ R = st.slider("Select the Red value:", min_value=0, max_value=max_value, value=0
 G = st.slider("Select the Green value:", min_value=0, max_value=max_value, value=0)
 B = st.slider("Select the Blue value:", min_value=0, max_value=max_value, value=0)
 
-# Initialize session state for messages
+# Initialize session state for messages and lock state
 if "messages" not in st.session_state:
     st.session_state.messages = []
+if "locked" not in st.session_state:
+    st.session_state.locked = False
 
 # Queue to hold sensor data
 sensor_data_queue = queue.Queue()
@@ -88,10 +90,12 @@ def send_and_receive(client, command_topic, msg, queue_timeout=60):
 
 
 # Publish button
-if st.button("Send RGB Command"):
+if st.button("Send RGB Command") and not st.session_state.locked:
     if not PICO_ID or not HIVEMQ_HOST or not HIVEMQ_USERNAME or not HIVEMQ_PASSWORD:
         st.error("Please enter all required fields.")
     else:
+        st.session_state.locked = True
+
         client = get_paho_client(
             sensor_data_topic,
             HIVEMQ_HOST,
@@ -106,6 +110,7 @@ if st.button("Send RGB Command"):
             client, command_topic, command_msg, queue_timeout=30
         )
 
+        st.session_state.locked = False
         st.success("Command sent successfully!")
         st.write("Sensor Data Received:", sensor_data)