[Tutorial] Building a simple UI with Squareline Studio to use on a microcontroller 

Thanks for saying that. It means a lot :) Glad it helped. I absolutely know what you mean. It took me quite a while to figure this out because noone gave a proper explanation 😄

I'm subscribed to your channel keep creating ✌️

I‘m glad it helped! I know exactly what you mean 😄 I spent a lot of time on trying to figure out how everything works, because no one shared all necessary information. I was so frustrated by that, that once I made it work, I decided to do a tutorial on it 😄

Glad to hear that!

Thank you :)

Glad it helped!

I haven’t tried doing more advanced stuff with squareline studio, as it does feel really janky and unfinished in my opinion, but I found it to be a shortcut for small projects. Would love to see the results if you try!

@@PhilippThalhammer sadly beside this there is no easy (doh!) way of programing the TFT screen

Yep, thats true… I mean you could go with LVGL from scratch, but I quickly lost motivation when I tried 😅

More tutorials? :) Initially I wasn’t going to, but seeing the response to this one kinda changed my mind 😂 I am currently working on one about rotary (ring) encoders, because there seems to be little to no resources about that. Maybe also a showcase on how to use them together with these round displays, as they go great together. Is there anything specific you would like to see? :)

@@PhilippThalhammer if you could also do one with cheaper and readily avaliable oled displays e.g these ili9341 displays it would be great

sorry tft displays

It should be very analogue with other tft displays, if you just follow the steps I outlined with this one. I don't really want to make another video about more or less the same topic 😅 Also the one I am using is about 7€😁 If you have problems feel free to ask though :) Maybe I will also create a discord server for stuff like this in the future 🤔

There seems to be support for micropython within Squareline Studio, however I am not sure how everything works exactly. I have only tried out Arduino so far 🤔 Glad you like the video :)

I did not define it as a set pin, instead I just read it directly in the loop function at the end :) It is in line 117 where it says „analogRead(25)“

@PhilippThalhammer it makes sense now thank you.

I think that might be an issue on your side 🤔 I just double checked on my PC and smartphone and its quite loud on both devices. Thank you for the suggestion anyways :)

@@PhilippThalhammerit‘s definitely an issue with this video. I also noticed it right away.

It is a bit quiet on my phone too

Thats wierd. I don’t understand why its not an issue on my devices then 🤔

Do you mean the volume on the video in total is low? Could you check with one of my other videos if the problem persists there as well? If thats no trouble for you of course.

Did you rename your asset in Squareline studio? This only works if you use the correct name. Maybe it could also be helpful to check out the GitHub repository I linked in the description. I have uploaded the example project there :)

@@PhilippThalhammer No I did not rename the asset. I downloaded your code from the GitHub and compiled it. It gives me this error: exit status 1 Compilation error: 'lv_draw_buf_t' does not name a type; did you mean 'lv_draw_ctx_t'? I am using LVGL library 8.4.0 but have tried all the libraries for example 8.3.0 through 9.1.0 but does not work.

Here are all the error from compiling:C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:13:8: error: 'lv_draw_buf_t' does not name a type; did you mean 'lv_draw_ctx_t'? static lv_draw_buf_t draw_buf; ^~~~~~~~~~~~~ lv_draw_ctx_t C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:28:82: error: expected constructor, destructor, or type conversion before ';' token my_disp_flush( lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p ) ^ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:28:80: error: ISO C++ forbids declaration of 'my_disp_flush' with no type [-fpermissive] my_disp_flush( lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p ) ^ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino: In function 'void setup()': C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:87:29: error: 'draw_buf' was not declared in this scope lv_disp_draw_buf_init( &draw_buf, buf, NULL, screenWidth * screenHeight / 10 ); ^~~~~~~~ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:95:25: error: invalid conversion from 'int (*)(lv_disp_drv_t*, const lv_area_t*, lv_color_t*)' {aka 'int (*)(_lv_disp_drv_t*, const lv_area_t*, lv_color16_t*)'} to 'void (*)(_lv_disp_drv_t*, const lv_area_t*, lv_color_t*)' {aka 'void (*)(_lv_disp_drv_t*, const lv_area_t*, lv_color16_t*)'} [-fpermissive] disp_drv.flush_cb = my_disp_flush; ^~~~~~~~~~~~~ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:97:25: error: cannot convert 'lv_disp_drv_t*' {aka '_lv_disp_drv_t*'} to 'lv_fs_drv_t*' {aka '_lv_fs_drv_t*'} lv_fs_drv_register( &disp_drv ); ^~~~~~~~~ In file included from c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\src\draw\lv_img_decoder.h:20, from c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\src\draw\lv_draw.h:20, from c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\src/hal/lv_hal_disp.h:21, from c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\src/hal/lv_hal.h:16, from c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\lvgl.h:33, from c:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\libraries\lvgl\src/lvgl.h:17, from C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:1: c:\users\adilu\onedrive\documents\arduino\squarelineround\projectfolder\libraries\lvgl\src\misc\lv_fs.h:131:39: note: initializing argument 1 of 'void lv_fs_drv_register(lv_fs_drv_t*)' void lv_fs_drv_register(lv_fs_drv_t * drv); ~~~~~~~~~~~~~~^~~ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:102:15: error: 'lv_fs_drv_t' {aka 'struct _lv_fs_drv_t'} has no member named 'type' indev_drv.type = LV_INDEV_TYPE_POINTER; ^~~~ C:\Users\adilu\OneDrive\Documents\Arduino\SquareLineRound\ProjectFolder\ui\ui.ino:103:25: error: invalid conversion from 'void (*)(lv_indev_drv_t*, lv_indev_data_t*)' {aka 'void (*)(_lv_indev_drv_t*, lv_indev_data_t*)'} to 'lv_fs_res_t (*)(_lv_fs_drv_t*, void*, void*, uint32_t, uint32_t*)' {aka 'unsigned char (*)(_lv_fs_drv_t*, void*, void*, unsigned int, unsigned int*)'} [-fpermissive] indev_drv.read_cb = my_touchpad_read; ^~~~~~~~~~~~~~~~ exit status 1 Compilation error: 'lv_draw_buf_t' does not name a type; did you mean 'lv_draw_ctx_t'?

Have you set you sketchbook-folder correctly in the Arduino IDE? Other than that I am not really sure what the problem seems to be. It looks like the library is not found correctly, and that normally happens when you dont relocate your sketchbook.

@@PhilippThalhammer OK, I will try this again and report to you. Thank you for the suggestion and help.

Haven't tried it yet. But I would assume yes, as Squareline Studio does support python (as far as I know) and Raspberry PIs can run python scripts just fine. Depending on what you are trying to do, it could be a little overkill to use a PI 5 however 😁 I just started my own discord-community. I would love to hear what you are making over there :)

@@PhilippThalhammer I am planning on using a pi 4 but don’t know what format file to use from SLS?(vsc with sdl or which format from SLS I need to pick for it to work) I am creating a GUI which would incorporate sensors that input values into scrollboxes

The eclipse SDL does support linux (see github.com/lvgl/lv_port_pc_eclipse ). So I guess it would be fine to install rasbian or something similar on your PI and run it there. However, thats just a guess. As I said I haven't tried it before 🤔

1. Das weiß der Aufruf, weil es oben deklariert wird ;) 2. Das Beschriften habe ich beim Aufnehmen vergessen, aber ich habe dafür Text eingeblendet um darauf hinzuweisen (siehe 1:49).

? 😄