# Send G-code to device via serial connection (Snapmaker 2.0 A350) **URL:** \ **Category:** Snapmaker 2.0 (3-in-1)\ **Tags:** Gcode\ **Created:** [May 1, 2025, 1:33pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364 "2025-05-01T13:33:08Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 1:33pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/1 "2025-05-01T13:33:08Z")
Why I cannot send the G-Code (loaded in Luban workspace ) generated in other software to the device. I have to copy to the fresh drive or connect via wifi to send it. ![image](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/2/5/258a15085679b0b6edb062e2365f26729e7c79eb.png) ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 5:32pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/2 "2025-05-01T17:32:31Z")
Interesting, never had problems like this. Whats your file-ending? May share your file here? Whats your Luban version and operating system? ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 5:41pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/3 "2025-05-01T17:41:22Z")
The file ending ? (I think CRLF) ,Windows generated.. Any file generated using ESTL Cam , I have this problem… My Luban version is 4.15.0. so, attached a file as example. [TDO-3.cnc](https://forum.snapmaker.com/uploads/short-url/5csVLsqsKDsHGsQIR2XM5aCK2Yv.cnc) (65.5 KB) ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 5:43pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/4 "2025-05-01T17:43:01Z")
You have to use a post processor for doing cnc. After correct generation the file ends in \*.nc ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 5:47pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/5 "2025-05-01T17:47:47Z")
I looked at your file but i am not sure about the first lines which are not uncommented. Try it again by editing the file extension to .nc ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 6:02pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/6 "2025-05-01T18:02:29Z")
Still the same issue, I have changed it to LF and changed it to \*.nc. I also have removed the first (lines) which are not un-commented (I thought “(” is also considered a comment). By the way, when we save the G-code from Luban, the extension suggested is \*.cnc. So, that is why I use cnc. ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 6:06pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/7 "2025-05-01T18:06:36Z")
Now, for testing purposes, I have generated a file using Luban (just a simple rectangle) and saved the G-code. Later, I have imported it (into the workspace), and it is also not able to send to device. ![image|690x4 Shape 1_1746121515020.cnc|attachment (15.5 KB) 66](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/f/6/f642972127cd27c4ed1e492628441b1e6fa5ff59.png) ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 6:10pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/8 "2025-05-01T18:10:22Z")
[Form\_1746122879107.cnc](https://forum.snapmaker.com/uploads/short-url/l3akhwHEwhrA4k6J6O6WC4pTpbL.cnc) (13.4 KB) I created a similar test and i am able to send it, may try? ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 6:14pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/9 "2025-05-01T18:14:07Z")
> [@mike\_br](#): > > saved the G-code. Later, I have imported it (into the workspace), and it i I have the same issue with your file. ![image](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/5/f/5f46654fa9ee93ae7161a681453880b97fa10418.png) ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 6:38pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/10 "2025-05-01T18:38:51Z")
You are connected over serial, this way no upload is possible. ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 6:39pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/11 "2025-05-01T18:39:38Z")
So, just to clarify, if I connect to the Snapmaker via WI-fi, I am able to send the file to the device. ![image](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/c/4/c41343a36d4c0ac25f9f3d5e320406c6acbd8438.png) I wanted to connect via USB (serial and send the G-code to the device the same way as in WI-FI )… ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [May 1, 2025, 6:40pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/12 "2025-05-01T18:40:50Z")
Serial connection is like bypassing the touchscreen and directly streaming to the controller of your machine. This way no upload is possible. ---
**Author:** ![mike\_br](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/mike_br/32/29054_2.png) [@mike\_br](https://forum.snapmaker.com/u/mike_br)\ **Post date:** [May 1, 2025, 6:47pm UTC](https://forum.snapmaker.com/t/send-g-code-to-device-via-serial-connection-snapmaker-2-0-a350/39364/13 "2025-05-01T18:47:43Z")
Hum, ok, maybe a feature for the future then! Thanks for helping (understand the problem)!