diff --git a/inc/protocol.h b/inc/protocol.h
--- a/inc/protocol.h
+++ b/inc/protocol.h
@@ -55,8 +55,9 @@ typedef enum {
     WATER_PH = 0x000E,
     CAN_ID = 0x0100,
     DATA_RATE = 0x0101,
-    GPIO = 0x0102,
-    LED_BRIGHTNESS = 0x0103,
+    LED_BRIGHTNESS = 0x0102,
+    INPUT = 0x0103,
+    OUTPUT = 0x0104,
 } protocol_data_key_t;
 
 void protocol_init(protocol_device_t device);
diff --git a/src/protocol.c b/src/protocol.c
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -124,6 +124,30 @@ bool protocol_send_data(protocol_data_ke
     return result;
 }
 
+bool _protocol_get_data(protocol_message_t* message)
+{
+    bool result = false;
+
+    if (message->key == CAN_ID)
+    {
+        protocol_send_data(message->key, message->sensor, protocol_settings.val.can_id);
+    }
+    else if (message->key == DATA_RATE)
+    {
+        protocol_send_data(message->key, message->sensor, ((float)protocol_settings.val.data_rate)/1000);
+    }
+    else if (message->key == LED_BRIGHTNESS)
+    {
+        protocol_send_data(message->key, message->sensor, protocol_settings.val.led_brightness);
+    }
+    else
+    {
+        //call config weak function
+        result = protocol_get_data(message);
+    }
+    return result;
+}
+
 bool _protocol_config(protocol_message_t* message)
 {
     bool result = false;