LuatOS/module/Air8101/demo/lvgl/lvgl_demo_test/lmeter_demo.lua

local lmeter_demo = {}

function lmeter_demo.demo()
    --Create a line meter
    local lmeter;
    lmeter = lvgl.linemeter_create(lvgl.scr_act(), nil);
    lvgl.linemeter_set_range(lmeter, 0, 100);                   --Set the range
    lvgl.linemeter_set_value(lmeter, 80);                       --Set the current value
    lvgl.linemeter_set_scale(lmeter, 240, 21);                  --Set the angle and number of lines
    lvgl.obj_set_size(lmeter, 150, 150);
    lvgl.obj_align(lmeter, nil, lvgl.ALIGN_CENTER, 0, 0);
end

return lmeter_demo