DIY an Laser Rangefinder，using Arduino&LVGL

Supplies

Single-point TOF Laser Ranging Sensor*1

Matouch -1.9’ display*1

Breadboard*1

Jumper Wires *1

Suitable size carton*1

Decorative Stickers

Paper cutter*1

Step 1: Hardware

1: Connecting Matouch -1.9’ display to the breadboard;

2:Connect the Laser Ranging Sensor and the Matouch 1.9" display in the breadboard with jumper cables;

Please note:

Red wire：Power，connect to Matouch-1.9’display 5V

Green wire：RX to Matouch-1.9’display IO3

White wire：TX to Matouch-1.9’display IO1

Black wire：GND to Matouch-1.9’display GND

Step 2: Create a New Project on LVGL

Step 3: Add Buttons and Label on Screen

Step 4: Add Button Event

Step 5: Change the Color to Your Liking

Step 6: According to Your Preferences in the "ADD FILE ASSETS" to Add Your Favorite Pictures, Set Your Screen Background

Step 7: Set the Location of the Export Code and Export UI Files and Create Template Project

Step 8: After Exporting, Copy LVGL_conf.h to the Src Folder in the LVGL Folder

Step 9: Open Ui_event.c in the LaserRanging\libraries\ui\src File of the Exported Project Document, Add the Key Event Code and Save

extern int work_flag;

void open_func(lv_event_t *e)

{

// Your code here

lv_obj_add_state(ui_Button1, LV_STATE_DISABLED);

lv_obj_clear_state(ui_Button3, LV_STATE_DISABLED);

work_flag = 1;

}

 

void close_func(lv_event_t *e)

{

// Your code here

lv_obj_add_state(ui_Button3, LV_STATE_DISABLED);

lv_obj_clear_state(ui_Button1, LV_STATE_DISABLED);

work_flag = 0;

}

Step 10: Copy the Four Files to the Arduino Libraries, Usually in the Form of (C)/Users/Document/arduino/libraries

Step 11: Open Ui.ino Through the Arduino IDE to Add Your Code

The code of leaser range can be refer to our github page

Note: the Arduino esp32 board should be 2.0.17 and its previous version, we used 2.0.11 version

Step 12: Modify Your Code

Use the Type-C USB cable to connect the board to the PC, select the development board "ESP32S3 Dev Module" and its port.

Step 13: Click Upload Code

Step 14: Make an Enclosure to Put the Hardware Into

Cut the box to size. Secure the assembled hardware inside the box.

Step 15: Result

As you can see in the picture above, this device works great.This handy little device can test the distance up to 20m and has an accuracy of 3cm. If you're interested, we've got a great tutorial that'll show you how to make your own laser rangefinder.

Step 16: Detailed Operation Video

To gain a more comprehensive understanding of the assembly testing process, we invite you to view the accompanying video. We look forward to sharing further DIY projects with you in due course.