-- Отправка сообщений через телеграм бота.
-- Для Windows ранее 10 нужно установить cUrl (https://ru.wikipedia.org/wiki/CURL)

function TgMsg(msg) -- 
  local token = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' 
  local chat_id = 'XXXXXXXXXX' 
    
  local function To_utf8(s)
    local res = {}
    for n=1, #s do
      local ch = string.byte(s,n)
      if ch > 0xBF then
        ch = ch+848
      end
      ch = (ch == 0xA8 and 0x401 or ch)
      ch = (ch == 0xB8 and 0x451 or ch)
      ch = (ch == 0xB9 and 0x2116 or ch)
      res[n] = utf8.char(ch)
    end
    return table.concat(res)
  end
  msg = To_utf8(msg)
  msg = string.gsub(msg,'[^0-9A-Za-z\x80-\xff._~-]', function(chr) return string.format("%%%02x", string.byte(chr))end) -- 
  local h = io.popen('curl.exe "https://api.telegram.org/bot'..token..'/sendMessage?chat_id='..chat_id..'&text="'..msg..'""')
  if h then 
    local a = h:read('a')
    h:close()
    if string.match(a,'"ok":true') then
      a = nil
    end
    return a
  end 
end