problem with 4g modem

[admin]

Change the same function as follows and see if it helps.

Code:

function AT:run()   local res, err, cmd, pos, sms   res, err = self:read()   if err then     return err == 'timeout'   end   -- check for incoming command   if res:sub(1, 1) ~= '+' then     return true   end   pos = res:find(':', 1, true)   if not pos then     return true   end   -- get command type   cmd = res:sub(2, pos - 1)   -- check only for incoming sms   if cmd == 'CMTI' then     -- read from sim     sms = self:incsms(res)     -- sms seems to be valid, pass to handler if specified     if sms and self.smshandler then       self.smshandler(sms)     end   end   return true end