BX310x +KTCPSTART data limit?

Greetings,

is there a maximum limit for the data to be sent in +KTCPSTART direct data mode? It seems that 3500 bytes can be transmitted ok, but if I try to send something like 7300 bytes then the module responds with “NO CARRIER”.

Hi @Repa,

Could you please let me know which Firmware you are using, is it the latest one. If not, please install the lasted Firmware.
When you do send data with length of 7300 bytes and module respond “NO CARRIER”, it may be due to network issue.
How many times have you tried sending, always showing the error or sometimes not?
Also, have you tried using +KTCPSND, does the module respond “NO CARRIER”?

Thanks,