nope the AT firmware is closed one and only SeeedStudio can flash it at factory 
The firmware file is not avalaible for flashing by yourself (which is an issue if you delete this fw and still needs it in device !)
nope the AT firmware is closed one and only SeeedStudio can flash it at factory The firmware file is not avalaible for flashing by yourself (which is an issue if you delete this fw and still needs it in device !)