Compiler/CC3220MODA: How to check whether the module is connected to the internet

Zac

Part Number: CC3220MODA

Tool/software: TI C/C++ Compiler

Team,

What is the safest option to check whether there is internet connection available in CC3220 module ?

1) I have tried implementing PING request to 8.8.8.8 (Google DNS), however that did not work correctly. Though this works initially, after a reconnection the PING request keeps failing even when internet connection is present.

2) As the next option, I have tried is to resolve www.google.com using sl_NetAppDnsGetHostByName to return an IP address. This also gives inconsistent result when the WiFi is connected and the internet is disabled. At times, ever thought the internet is unavailable, sl_NetAppDnsGetHostByName returns an IP address (may be due to some DNS cache).

Can someone please evaluate these cases and help us understand on such behaviour ? Is there a better and easy option to check for internet ? If so, please post some examples.

Regards,

Zac

over 5 years ago

0 Hnz over 5 years ago

Guru 39650 points

Hi Zac,

I think best way is to send http GET to google. For this purpose you can use http client library from SDK or pure TCP connection as you want.

Jan

0 Zac over 5 years ago in reply to Hnz

Genius 3100 points

Hi Jan,

Can you please share some code samples to use pure TCP connection for testing internet connection?

Regards,

Zac

0 Hnz over 5 years ago in reply to Zac

Guru 39650 points

Hi Zac,

Sorry, but I don't have such example. But generally it is nothing more than resolving DNS to "google.com" and after that opening TCP connection at port 80 and sending HTTP GET request and reading data back. Generally it is a pretty simple task.

Jan

0 Kobi Leibovitch over 5 years ago in reply to Hnz

TI__Guru 63006 points

The HTTPGet example shows exactly this.

Br,

Kobi

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Compiler/CC3220MODA: How to check whether the module is connected to the internet