SMS not received

[admin]

Update the function once more, it won't spam the log with empty messages.

Code:

function AT:read(timeout)   local char, err, timeout, deftimeout, line   -- default timeout is 2 seconds, converted to 0.1 sec ticks   timeout = tonumber(timeout) or 2   timeout = timeout * 10   deftimeout = timeout   -- read until got one line or timeout occured   while timeout > 0 do     -- read 1 char     char, err = self.port:read(1, 0.1)     -- got data     if char then       -- got LF, end of line       if char == '\n' then         -- convert to string and empty buffer         line = table.concat(self.buffer)         self.buffer = {}         line = line:trim()         -- return only lines with data         if #line > 0 then           log('read line', line)           return line         -- reset timeout         else           timeout = deftimeout         end       -- ignore CR       elseif char ~= '\r' then         table.insert(self.buffer, char)       end     -- read timeout     elseif err == 'timeout' then       timeout = timeout - 1     -- other error     else       break     end   end   line = table.concat(self.buffer)   if #line > 0 then     log('read timeout', line)   end   return nil, err end

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