local point = 0;
local time_zone = 3;
local sntp_cnt = 1;
local cur_intensity = 0x0F;
function timer_do()
    tm = rtctime.epoch2cal(rtctime.get());
    if point == 0 then point = 1; else point = 0; end;
    max7219_intensity(cur_intensity);
    max7219_output(5, tm["min"]%10);
    max7219_output(4, tm["min"]/10);
    max7219_output(2, tm["hour"]%10 + (128*point));
    max7219_output(1, tm["hour"]/10);
    if tm["hour"] <= 7 then
        -- from 0 to 8
        cur_intensity = 0x01;
    else
        if tm["hour"] <= 18 then
            -- from 8 to 19
            cur_intensity = 0x0F;
        else
            if tm["hour"] <= 22 then
                -- from 19 to 22
                cur_intensity = 0x05;
            else
                -- from 23 to 24
                cur_intensity = 0x01;
            end
        end
    end
end
function sntp_sync()
    print ("SNTP sync");
    sntp.sync("194.54.161.214",
        function(sec, usec, server, info)
            rtctime.set(sec + 3600*time_zone)
            tm = rtctime.epoch2cal(rtctime.get());
            print(string.format("%04d/%02d/%02d %02d:%02d:%02d", tm["year"], tm["mon"], tm["day"], tm["hour"], tm["min"], tm["sec"]));
            sntp_cnt = 4320;
        end,
        function(err, str)
            print("Nope...")
        end
    )
end
function timer_sntp()
    if sntp_cnt > 0 then
        sntp_cnt = sntp_cnt - 1;
    else
        if wifi.sta.status() == wifi.STA_GOTIP then
            print("Connected to WiFi as:" .. wifi.sta.getip());
            sntp_cnt = 6;
            sntp_sync();
        else
            print("No WiFi");
        end;
    end
end
require("max7219");
max7219_spi_init();
max7219_init(5, cur_intensity);
rtctime.set(1577872800 + 3600*time_zone);
tm = rtctime.epoch2cal(rtctime.get());
print(string.format("%02d:%02d:%02d", tm["hour"], tm["min"], tm["sec"]));
enduser_setup.start(
  function()
    print("Connected to WiFi as:" .. wifi.sta.getip())
    sntp_sync();
  end,
  function(err, str)
    print("enduser_setup: Err #" .. err .. ": " .. str)
  end
);
local mytimer = tmr.create();
mytimer:register(500, tmr.ALARM_AUTO, timer_do);
mytimer:start()
local sntp_timer = tmr.create();
sntp_timer:register(10000, tmr.ALARM_AUTO, timer_sntp);
sntp_timer:start()
collectgarbage();