Maximum AT command string length



Is there a size limit of AT commands? Like 256 bytes? Is it possible to make them bigger (e.g. 2048 bytes)?


The max length of AT commands chain separated by “;” in Sierra Wireless modules is 550 characters. But it is recommended to use only 5 commands at maximum at the same time. It means at+cmd1;+cmd2;+cmd3;+cmd4;+cmd5.