Update Galea serial default setting and log gains

src/board_controller/openbci/galea_serial_v4.cpp

@@ -85,7 +85,7 @@ int GaleaSerialV4::prepare_session ()
 
     // set initial settings
     std::string tmp;
-    std::string default_settings = "o"; // use demo mode with agnd
+    std::string default_settings = "d"; // use default mode
     res = config_board (default_settings, tmp);
     if (res != (int)BrainFlowExitCodes::STATUS_OK)
     {
@@ -127,6 +127,23 @@ int GaleaSerialV4::config_board (std::string conf, std::string &response)
         return res;
     }
 
+    if (conf == "get_gains")
+    {
+        std::stringstream gains;
+
+        for (int i = 0; i < 20; i++)
+        {
+            gains << gain_tracker.get_gain_for_channel (i);
+            if (i < 19)
+            {
+                gains << ", ";
+            }
+        }
+        response = gains.str ();
+        safe_logger (spdlog::level::info, "gains for all channels: {}", response);
+        return (int)BrainFlowExitCodes::STATUS_OK;
+    }
+
     if (gain_tracker.apply_config (conf) == (int)OpenBCICommandTypes::INVALID_COMMAND)
     {
         safe_logger (spdlog::level::warn, "invalid command: {}", conf.c_str ());