From fc5fec13150278516cac371eb3db0d6dd2303e5e Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sun, 26 Mar 2017 21:07:46 +0200
Subject: [PATCH] Always send M105 on connection in case firmware is silent.
 #3767

---
 xs/src/libslic3r/GCodeSender.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xs/src/libslic3r/GCodeSender.cpp b/xs/src/libslic3r/GCodeSender.cpp
index c880ee4089..237009392e 100644
--- a/xs/src/libslic3r/GCodeSender.cpp
+++ b/xs/src/libslic3r/GCodeSender.cpp
@@ -106,6 +106,9 @@ GCodeSender::connect(std::string devname, unsigned int baud_rate)
     boost::thread t(boost::bind(&asio::io_service::run, &this->io));
     this->background_thread.swap(t);
     
+    // always send a M105 to check for connection because firmware might be silent on connect 
+    this->send("M105", true);
+    
     return true;
 }