Data mode on startup

Posted on October 26, 2015 at 10:18

Hi John,

no external MCU...?

Posted on October 26, 2015 at 10:48

Hi gerardo,

I did not understand your question but here is my entire setup.

My wifi module is connected with an external MCU and when I send the command AT+S.SOCKD=8825 the port is opened . 

when the port is opened it is possible for me to connect any wifi device to the module but there is no data transfer happening.

The data transfer is happening only when I do MCU reset but this time my MCU sends the same command again''AT+S.SOCKD=8825'' which is not good because wifi module is displaying 'error : already in data mode'.

So I want to save the command on the wifi module like we configure the ip address, password in the command mode and the module will take it automatically all the times.

sorry if I am explaining some irrelevant things... -;) 

Posted on October 26, 2015 at 11:32

Hi John,

>>> The data transfer is happening only when I do MCU reset

Why?

>>> wifi module is displaying 'error : already in data mode'.

I expect an ''error: Socket Server already up and running'' if trying to open an already opened sockd.

Anyway, you can handle this exception. It's not a real problem for the module itself.

>>> I want to save the command on the wifi module

Currently not available this feature.

PS: what kind of MCU are you using. If your MCU allows it, you can use backup registers. After reset, check the content of this registers to know if the module has already an opened port. Backup registers are lost only when power supply is disconnected.

Posted on October 26, 2015 at 11:40

Hi gerardo,

I dont know why data transfer is happening only on MCU reset !!!

yes you are right the error is 'Socket Server already up and running'

MCU - STM32F756NG

I think the problem is with my skill on MCU management , I am new to MCU programming and I need to study and understand more.