diff --git a/cqg-cms-api-client/app/cqg-cms-example/Main.hs b/cqg-cms-api-client/app/cqg-cms-example/Main.hs
index 5c224d9..a7a064f 100644
--- a/cqg-cms-api-client/app/cqg-cms-example/Main.hs
+++ b/cqg-cms-api-client/app/cqg-cms-example/Main.hs
@@ -67,4 +67,3 @@ app ::
     IO ()
 app cqgUsername cqgPassword cqgClientAppId conn = do
     logon cqgUsername cqgPassword cqgClientAppId conn
-  
diff --git a/cqg-cms-api-client/src/Lib.hs b/cqg-cms-api-client/src/Lib.hs
index 5f9e98e..c2b7257 100644
--- a/cqg-cms-api-client/src/Lib.hs
+++ b/cqg-cms-api-client/src/Lib.hs
@@ -1,15 +1,16 @@
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE TypeApplications #-}
+{-# LANGUAGE LambdaCase #-}
 
 module Lib (logon) where
 
 import Data.Function ((&))
-import Data.ProtoLens (defMessage)
+import Data.ProtoLens (defMessage, encodeMessage, decodeMessage)
 import Data.ProtoLens.Field (field)
 import Data.Text (Text)
 import Lens.Micro ((.~))
-import Network.WebSockets (Connection)
-import Proto.CMS.Cmsapi1 ()
+import Network.WebSockets (Connection, sendBinaryData, receiveData)
+import Proto.CMS.Cmsapi1 (ServerMessage, ClientMessage, ProtocolVersion (..))
 import Proto.CMS.Common1 (Logon)
 
 logon ::
@@ -23,9 +24,26 @@ logon ::
     IO ()
 logon cqgUsername cqgPassword cqgClientAppId conn = do
     print logonMsg
+    sendBinaryData conn rawClientMsg
+    rawResp <- receiveData conn
+    print (decodeMessage rawResp :: Either String ServerMessage)
     where
+      clientMsg = defMessage @ClientMessage & field @"logon" .~ logonMsg
+
+      rawClientMsg = encodeMessage clientMsg
+
       logonMsg =
           defMessage @Logon &
               field @"userName" .~ cqgUsername &
               field @"password" .~ cqgPassword &
-              field @"clientAppId" .~ cqgClientAppId
+              field @"clientAppId" .~ cqgClientAppId &
+              field @"protocolVersionMajor" .~ fromIntegral (fromEnum PROTOCOL_VERSION_MAJOR) &
+              field @"protocolVersionMinor" .~ fromIntegral (fromEnum PROTOCOL_VERSION_MINOR)
+
+      -- handleRawResp :: Message -> IO ()
+      -- handleRawResp = \case
+      --     ControlMessage ctrlMsg -> print ctrlMsg
+      --     DataMessage _ _ _ dmsg ->
+      --         let dmsg = 
+      --         case dmsg of
+