diff --git a/src/slic3r/Utils/Duet.cpp b/src/slic3r/Utils/Duet.cpp
index 690e1000c7..73a4438dd8 100644
--- a/src/slic3r/Utils/Duet.cpp
+++ b/src/slic3r/Utils/Duet.cpp
@@ -29,10 +29,28 @@
 #include "slic3r/GUI/format.hpp"
 #include "Http.hpp"
 
+#include <curl/curl.h>
+
 namespace fs = boost::filesystem;
 namespace pt = boost::property_tree;
 
 namespace Slic3r {
+namespace {
+std::string escape_string(const std::string& unescaped)
+{
+	std::string ret_val;
+	CURL* curl = curl_easy_init();
+	if (curl) {
+		char* decoded = curl_easy_escape(curl, unescaped.c_str(), unescaped.size());
+		if (decoded) {
+			ret_val = std::string(decoded);
+			curl_free(decoded);
+		}
+		curl_easy_cleanup(curl);
+	}
+	return ret_val;
+}
+}
 
 Duet::Duet(DynamicPrintConfig *config) :
 	host(config->opt_string("print_host")),
@@ -81,6 +99,8 @@ bool Duet::upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, ErrorFn e
 	auto http = (dsf ? Http::put(std::move(upload_cmd)) : Http::post(std::move(upload_cmd)));
 	if (dsf) {
 		http.set_put_body(upload_data.source_path);
+		if (connect_msg.empty())
+			http.header("X-Session-Key", boost::nowide::narrow(connect_msg));
 	} else {
 		http.set_post_body(upload_data.source_path);
 	}
@@ -140,7 +160,20 @@ Duet::ConnectionType Duet::connect(wxString &msg) const
 					msg = format_error(body, error, status);
 				})
 				.on_complete([&](std::string body, unsigned) {
-					res = ConnectionType::dsf;
+					try {		
+						pt::ptree root;
+						std::istringstream iss(body);
+						pt::read_json(iss, root);
+						auto key = root.get_optional<std::string>("sessionKey");
+						if (key)
+							msg = boost::nowide::widen(*key);
+						res = ConnectionType::dsf;
+					}
+					catch (const std::exception&) {
+						BOOST_LOG_TRIVIAL(error) << "Failed to parse serverKey from Duet reply to Connect request: " << body;
+						msg = format_error(body, L("Failed to parse a Connect reply"), 0);
+						res = ConnectionType::error;
+					}
 				})
 				.perform_sync();
 		})
@@ -205,12 +238,13 @@ std::string Duet::get_upload_url(const std::string &filename, ConnectionType con
 std::string Duet::get_connect_url(const bool dsfUrl) const
 {
 	if (dsfUrl)	{
-		return (boost::format("%1%machine/status")
-				% get_base_url()).str();
+		return (boost::format("%1%machine/connect?password=%2%")
+			% get_base_url()
+			% (password.empty() ? "reprap" : escape_string(password))).str();
 	} else {
 		return (boost::format("%1%rr_connect?password=%2%&%3%")
 				% get_base_url()
-				% (password.empty() ? "reprap" : password)
+				% (password.empty() ? "reprap" : escape_string(password))
 				% timestamp_str()).str();
 	}
 }
diff --git a/src/slic3r/Utils/Duet.hpp b/src/slic3r/Utils/Duet.hpp
index 006914cdd3..a03f17e458 100644
--- a/src/slic3r/Utils/Duet.hpp
+++ b/src/slic3r/Utils/Duet.hpp
@@ -35,7 +35,7 @@ public:
 	std::string get_host() const override { return host; }
    
 private:
-	enum class ConnectionType { rrf, dsf, error };
+	enum class ConnectionType { rrf, dsf, error }; // rrf = RepRapFirmware, dsf = DuetSoftwareFramework
 	std::string host;
 	std::string password;