CC3000 how to keep alive when the network is from broken to normal

wocgjjc

Intellectual 350 points

Hi,

Now I use the CC3000 as a tcp client, and PC as a tcp server, I found that when I unplug the networkcable,

the CC3000 does't detect the netoff, what can I do to reconnect to the PC's tcp server again?

thanks

over 12 years ago

0 made4engineering over 12 years ago

TI__Mastermind 27605 points

Hello,

When sending a packet fails, have you tried closing the socket then connecting again?

Thanks,

Aaron

0 wocgjjc over 12 years ago in reply to made4engineering

Intellectual 350 points

Hi,

Yes, I did as you said .But now the question is that when I unplug the networkcable, the send() function doesn't return -1.

So the MCU doesn't know the network is broken,and it will not call closesocket() and connect to the server again .

And the MCU will call send() many times ,then the send() function returns -1.

Is this the tcpip's limitation? Does CC3000 has a good solution?

Thank you.

0 made4engineering over 12 years ago in reply to wocgjjc

TI__Mastermind 27605 points

Hi,

If you need something reliable for every packet even after forceful disconnection, you can try implementing a system which requires a reply back after every packet sent. Pinging right before sending may work most of the time also, but would not be 100% reliable.

Thanks,

Aaron

0 wocgjjc over 12 years ago in reply to made4engineering

Intellectual 350 points

Hi,

Thanks for your fast reply . As you said ,now my tcp client sends messages to the server timely and waits for response .

If not recieving any response ,then the CC3000 rebulid socket and reconnect to the server again.

thanks

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CC3000 how to keep alive when the network is from broken to normal