diff --git a/src/slic3r/Utils/Duet.cpp b/src/slic3r/Utils/Duet.cpp
index 4536dd217..cc6b0ebd9 100644
--- a/src/slic3r/Utils/Duet.cpp
+++ b/src/slic3r/Utils/Duet.cpp
@@ -36,12 +36,10 @@ const char* Duet::get_name() const { return "Duet"; }
 
 bool Duet::test(wxString &msg) const
 {
-	bool connected = connect(msg);
-	if (connected) {
-		disconnect();
-	}
+	auto connectionType = connect(msg);
+	disconnect(connectionType);
 
-	return connected;
+	return connectionType != Duet::ConnectionType::ERROR;
 }
 
 wxString Duet::get_test_ok_msg () const
@@ -59,33 +57,39 @@ wxString Duet::get_test_failed_msg (wxString &msg) const
 bool Duet::upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, ErrorFn error_fn) const
 {
 	wxString connect_msg;
-	if (!connect(connect_msg)) {
+	auto connectionType = connect(connect_msg);
+	if (connectionType == Duet::ConnectionType::ERROR) {
 		error_fn(std::move(connect_msg));
 		return false;
 	}
 
 	bool res = true;
+	bool dsf = (connectionType == Duet::ConnectionType::DSF);
 
-	auto upload_cmd = get_upload_url(upload_data.upload_path.string());
+	auto upload_cmd = get_upload_url(upload_data.upload_path.string(), connectionType);
 	BOOST_LOG_TRIVIAL(info) << boost::format("Duet: Uploading file %1%, filepath: %2%, print: %3%, command: %4%")
 		% upload_data.source_path
 		% upload_data.upload_path
 		% upload_data.start_print
 		% upload_cmd;
 
-	auto http = Http::post(std::move(upload_cmd));
-	http.set_post_body(upload_data.source_path)
-		.on_complete([&](std::string body, unsigned status) {
+	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);
+	} else {
+		http.set_post_body(upload_data.source_path);
+	}
+	http.on_complete([&](std::string body, unsigned status) {
 			BOOST_LOG_TRIVIAL(debug) << boost::format("Duet: File uploaded: HTTP %1%: %2%") % status % body;
 
-			int err_code = get_err_code_from_body(body);
+			int err_code = dsf ? (status == 201 ? 0 : 1) : get_err_code_from_body(body);
 			if (err_code != 0) {
 				BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Request completed but error code was received: %1%") % err_code;
 				error_fn(format_error(body, L("Unknown error occured"), 0));
 				res = false;
 			} else if (upload_data.start_print) {
 				wxString errormsg;
-				res = start_print(errormsg, upload_data.upload_path.string());
+				res = start_print(errormsg, upload_data.upload_path.string(), connectionType);
 				if (! res) {
 					error_fn(std::move(errormsg));
 				}
@@ -106,20 +110,28 @@ bool Duet::upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, ErrorFn e
 		})
 		.perform_sync();
 
-	disconnect();
+	disconnect(connectionType);
 
 	return res;
 }
 
-bool Duet::connect(wxString &msg) const
+Duet::ConnectionType Duet::connect(wxString &msg) const
 {
-	bool res = false;
-	auto url = get_connect_url();
+	auto res = Duet::ConnectionType::ERROR;
+	auto url = get_connect_url(false);
 
 	auto http = Http::get(std::move(url));
 	http.on_error([&](std::string body, std::string error, unsigned status) {
-			BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error connecting: %1%, HTTP %2%, body: `%3%`") % error % status % body;
-			msg = format_error(body, error, status);
+			auto dsfUrl = get_connect_url(true);
+			auto dsfHttp = Http::get(std::move(dsfUrl));
+			dsfHttp.on_error([&](std::string body, std::string error, unsigned status) {
+					BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error connecting: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+					msg = format_error(body, error, status);
+				})
+				.on_complete([&](std::string body, unsigned) {
+					res = Duet::ConnectionType::DSF;
+				})
+				.perform_sync();
 		})
 		.on_complete([&](std::string body, unsigned) {
 			BOOST_LOG_TRIVIAL(debug) << boost::format("Duet: Got: %1%") % body;
@@ -127,7 +139,7 @@ bool Duet::connect(wxString &msg) const
 			int err_code = get_err_code_from_body(body);
 			switch (err_code) {
 				case 0:
-					res = true;
+					res = Duet::ConnectionType::RRF;
 					break;
 				case 1:
 					msg = format_error(body, L("Wrong password"), 0);
@@ -146,8 +158,12 @@ bool Duet::connect(wxString &msg) const
 	return res;
 }
 
-void Duet::disconnect() const
+void Duet::disconnect(Duet::ConnectionType connectionType) const
 {
+	// we don't need to disconnect from DSF or if it failed anyway
+	if (connectionType != Duet::ConnectionType::RRF) {
+		return;
+	}
 	auto url =  (boost::format("%1%rr_disconnect")
 			% get_base_url()).str();
 
@@ -159,20 +175,31 @@ void Duet::disconnect() const
 	.perform_sync();
 }
 
-std::string Duet::get_upload_url(const std::string &filename) const
+std::string Duet::get_upload_url(const std::string &filename, Duet::ConnectionType connectionType) const
 {
-	return (boost::format("%1%rr_upload?name=0:/gcodes/%2%&%3%")
-			% get_base_url()
-			% Http::url_encode(filename) 
-			% timestamp_str()).str();
+	if (connectionType == Duet::ConnectionType::DSF) {
+		return (boost::format("%1%machine/file/gcodes/%2%")
+				% get_base_url()
+				% Http::url_encode(filename)).str();
+	} else {
+		return (boost::format("%1%rr_upload?name=0:/gcodes/%2%&%3%")
+				% get_base_url()
+				% Http::url_encode(filename)
+				% timestamp_str()).str();
+	}
 }
 
-std::string Duet::get_connect_url() const
+std::string Duet::get_connect_url(const bool dsfUrl) const
 {
-	return (boost::format("%1%rr_connect?password=%2%&%3%")
-			% get_base_url()
-			% (password.empty() ? "reprap" : password)
-			% timestamp_str()).str();
+	if (dsfUrl)	{
+		return (boost::format("%1%machine/status")
+				% get_base_url()).str();
+	} else {
+		return (boost::format("%1%rr_connect?password=%2%&%3%")
+				% get_base_url()
+				% (password.empty() ? "reprap" : password)
+				% timestamp_str()).str();
+	}
 }
 
 std::string Duet::get_base_url() const
@@ -201,15 +228,25 @@ std::string Duet::timestamp_str() const
 	return std::string(buffer);
 }
 
-bool Duet::start_print(wxString &msg, const std::string &filename) const 
+bool Duet::start_print(wxString &msg, const std::string &filename, Duet::ConnectionType connectionType) const
 {
 	bool res = false;
+	bool dsf = (connectionType == Duet::ConnectionType::DSF);
 
-	auto url = (boost::format("%1%rr_gcode?gcode=M32%%20\"%2%\"")
+	auto url = dsf
+		? (boost::format("%1%machine/code")
+			% get_base_url()).str()
+		: (boost::format("%1%rr_gcode?gcode=M32%%20\"0:/gcodes/%2%\"")
 			% get_base_url()
 			% Http::url_encode(filename)).str();
 
-	auto http = Http::get(std::move(url));
+	auto http = (dsf ? Http::post(std::move(url)) : Http::get(std::move(url)));
+	if (dsf) {
+		http.set_post_body(
+				(boost::format("M32 \"0:/gcodes/%1%\"")
+					% filename).str()
+				);
+	}
 	http.on_error([&](std::string body, std::string error, unsigned status) {
 			BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error starting print: %1%, HTTP %2%, body: `%3%`") % error % status % body;
 			msg = format_error(body, error, status);
diff --git a/src/slic3r/Utils/Duet.hpp b/src/slic3r/Utils/Duet.hpp
index 702efbddb..41c6b1d75 100644
--- a/src/slic3r/Utils/Duet.hpp
+++ b/src/slic3r/Utils/Duet.hpp
@@ -29,16 +29,17 @@ public:
 	std::string get_host() const override { return host; }
 
 private:
+	enum ConnectionType { RRF, DSF, ERROR };
 	std::string host;
 	std::string password;
 
-	std::string get_upload_url(const std::string &filename) const;
-	std::string get_connect_url() const;
+	std::string get_upload_url(const std::string &filename, Duet::ConnectionType connectionType) const;
+	std::string get_connect_url(const bool dsfUrl) const;
 	std::string get_base_url() const;
 	std::string timestamp_str() const;
-	bool connect(wxString &msg) const;
-	void disconnect() const;
-	bool start_print(wxString &msg, const std::string &filename) const;
+	Duet::ConnectionType connect(wxString &msg) const;
+	void disconnect(Duet::ConnectionType connectionType) const;
+	bool start_print(wxString &msg, const std::string &filename, Duet::ConnectionType connectionType) const;
 	int get_err_code_from_body(const std::string &body) const;
 };
 
diff --git a/src/slic3r/Utils/Http.cpp b/src/slic3r/Utils/Http.cpp
index a16aac5b5..3360f6eff 100644
--- a/src/slic3r/Utils/Http.cpp
+++ b/src/slic3r/Utils/Http.cpp
@@ -35,11 +35,11 @@ struct CurlGlobalInit
 {
     static std::unique_ptr<CurlGlobalInit> instance;
     std::string message;
-    
+
 	CurlGlobalInit()
     {
 #ifdef OPENSSL_CERT_OVERRIDE // defined if SLIC3R_STATIC=ON
-        
+
         // Look for a set of distro specific directories. Don't change the
         // order: https://bugzilla.redhat.com/show_bug.cgi?id=1053882
         static const char * CA_BUNDLES[] = {
@@ -48,17 +48,17 @@ struct CurlGlobalInit
             "/usr/share/ssl/certs/ca-bundle.crt",
             "/usr/local/share/certs/ca-root-nss.crt", // FreeBSD
             "/etc/ssl/cert.pem",
-            "/etc/ssl/ca-bundle.pem"              // OpenSUSE Tumbleweed              
+            "/etc/ssl/ca-bundle.pem"              // OpenSUSE Tumbleweed
         };
-        
+
         namespace fs = boost::filesystem;
         // Env var name for the OpenSSL CA bundle (SSL_CERT_FILE nomally)
         const char *const SSL_CA_FILE = X509_get_default_cert_file_env();
         const char * ssl_cafile = ::getenv(SSL_CA_FILE);
-        
+
         if (!ssl_cafile)
             ssl_cafile = X509_get_default_cert_file();
-        
+
         int replace = true;
         if (!ssl_cafile || !fs::exists(fs::path(ssl_cafile))) {
             const char * bundle = nullptr;
@@ -86,15 +86,15 @@ struct CurlGlobalInit
         }
 
 #endif // OPENSSL_CERT_OVERRIDE
-        
+
         if (CURLcode ec = ::curl_global_init(CURL_GLOBAL_DEFAULT)) {
             message += _u8L("CURL init has failed. PrusaSlicer will be unable to establish "
                             "network connections. See logs for additional details.");
-            
+
             BOOST_LOG_TRIVIAL(error) << ::curl_easy_strerror(ec);
         }
     }
-    
+
 	~CurlGlobalInit() { ::curl_global_cleanup(); }
 };
 
@@ -120,6 +120,7 @@ struct Http::priv
 	std::string error_buffer;    // Used for CURLOPT_ERRORBUFFER
 	size_t limit;
 	bool cancel;
+	fs::ifstream* putFile;
 
 	std::thread io_thread;
 	Http::CompleteFn completefn;
@@ -138,6 +139,8 @@ struct Http::priv
 	void set_timeout_connect(long timeout);
 	void form_add_file(const char *name, const fs::path &path, const char* filename);
 	void set_post_body(const fs::path &path);
+	void set_post_body(const std::string body);
+	void set_put_body(const fs::path &path);
 
 	std::string curl_error(CURLcode curlcode);
 	std::string body_size_error();
@@ -152,9 +155,10 @@ Http::priv::priv(const std::string &url)
 	, error_buffer(CURL_ERROR_SIZE + 1, '\0')
 	, limit(0)
 	, cancel(false)
+	, putFile(nullptr)
 {
     Http::tls_global_init();
-    
+
 	if (curl == nullptr) {
 		throw std::runtime_error(std::string("Could not construct Curl object"));
 	}
@@ -284,6 +288,22 @@ void Http::priv::set_post_body(const fs::path &path)
 	postfields = file_content;
 }
 
+void Http::priv::set_post_body(const std::string body)
+{
+	postfields = body;
+}
+
+void Http::priv::set_put_body(const fs::path &path)
+{
+	boost::system::error_code ec;
+	boost::uintmax_t filesize = file_size(path, ec);
+	if (!ec) {
+		putFile = new fs::ifstream(path);
+		::curl_easy_setopt(curl, CURLOPT_READDATA, (void *) (putFile));
+		::curl_easy_setopt(curl, CURLOPT_INFILESIZE, filesize);
+	}
+}
+
 std::string Http::priv::curl_error(CURLcode curlcode)
 {
 	return (boost::format("%1%:\n%2%\n[Error %3%]")
@@ -335,6 +355,11 @@ void Http::priv::http_perform()
 
 	CURLcode res = ::curl_easy_perform(curl);
 
+	if (putFile != nullptr) {
+		delete putFile;
+		putFile = nullptr;
+	}
+
 	if (res != CURLE_OK) {
 		if (res == CURLE_ABORTED_BY_CALLBACK) {
 			if (cancel) {
@@ -455,6 +480,18 @@ Http& Http::set_post_body(const fs::path &path)
 	return *this;
 }
 
+Http& Http::set_post_body(const std::string body)
+{
+	if (p) { p->set_post_body(body); }
+	return *this;
+}
+
+Http& Http::set_put_body(const fs::path &path)
+{
+	if (p) { p->set_put_body(path);}
+	return *this;
+}
+
 Http& Http::on_complete(CompleteFn fn)
 {
 	if (p) { p->completefn = std::move(fn); }
@@ -509,6 +546,13 @@ Http Http::post(std::string url)
 	return http;
 }
 
+Http Http::put(std::string url)
+{
+	Http http{std::move(url)};
+	curl_easy_setopt(http.p->curl, CURLOPT_UPLOAD, 1L);
+	return http;
+}
+
 bool Http::ca_file_supported()
 {
 	::CURL *curl = ::curl_easy_init();
@@ -521,7 +565,7 @@ std::string Http::tls_global_init()
 {
     if (!CurlGlobalInit::instance)
         CurlGlobalInit::instance = std::make_unique<CurlGlobalInit>();
-    
+
     return CurlGlobalInit::instance->message;
 }
 
@@ -532,7 +576,7 @@ std::string Http::tls_system_cert_store()
 #ifdef OPENSSL_CERT_OVERRIDE
     ret = ::getenv(X509_get_default_cert_file_env());
 #endif
-    
+
     return ret;
 }
 
diff --git a/src/slic3r/Utils/Http.hpp b/src/slic3r/Utils/Http.hpp
index f16236279..1ee47606e 100644
--- a/src/slic3r/Utils/Http.hpp
+++ b/src/slic3r/Utils/Http.hpp
@@ -49,6 +49,7 @@ public:
 	// for a GET and a POST request respectively.
 	static Http get(std::string url);
 	static Http post(std::string url);
+	static Http put(std::string url);
 	~Http();
 
 	Http(const Http &) = delete;
@@ -80,6 +81,16 @@ public:
 	// This can be used for hosts which do not support multipart requests.
 	Http& set_post_body(const boost::filesystem::path &path);
 
+	// Set the POST request body.
+	// The data is used verbatim, it is not additionally encoded in any way.
+	// This can be used for hosts which do not support multipart requests.
+	Http& set_post_body(const std::string body);
+
+	// Set the file contents as a PUT request body.
+	// The data is used verbatim, it is not additionally encoded in any way.
+	// This can be used for hosts which do not support multipart requests.
+	Http& set_put_body(const boost::filesystem::path &path);
+
 	// Callback called on HTTP request complete
 	Http& on_complete(CompleteFn fn);
 	// Callback called on an error occuring at any stage of the requests: Url parsing, DNS lookup,
@@ -100,7 +111,7 @@ public:
 
 	// Tells whether current backend supports seting up a CA file using ca_file()
 	static bool ca_file_supported();
-    
+
     // Return empty string on success or error message on fail.
     static std::string tls_global_init();
     static std::string tls_system_cert_store();