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| From: | Nikolas Karakotas |
| Subject: | Re: [lwip-users] Problems Connecting to a GSM Router |
| Date: | Mon, 12 Nov 2012 15:32:16 +0200 |
|
Hi,
I use a GSM/GPRS module directly using PPP so you are right its not the
tcp/ip stack. GSM modules might loose/drop a connection if the signal is weak or
if your power supply isnt good enough 2-3Amps if not met then this will
introduce a voltage drop and might lock the GSM. Does the router have the
ability to redial if the connection is dropped for any reason?
I once used a TP link and sucked big time! Worked for a while and then got
stuck (USB dongle one)
Regards,
Nick
From: Walter Sägessser
Sent: Monday, November 12, 2012 2:38 PM
To: address@hidden
Subject: [lwip-users] Problems Connecting to a GSM
Router We
have developed a gateway that sends data gathered from some devices to a server.
Via LAN -> WAN this works fine and reliably for months without failure. Now a
customer has connected a GSM rounter instead. In principle this works, too. But
after a not predictable time (minutes, hours, ... ) the GSM-router locks. When
trying to establish a TCP-connection via "netconn_connect" I get -10 (connection
aborted). I don't see how I could change the behavior for the connect command – either it works or it does not. Actually I think the problem is with the GSM-router, but may be, just may be anyone knows a trick or a special consideration to get rid of this connection problem. The connection gets closed after each transmission and the repetition rate is about 5 minutes. Thus the amount of data cannot be the problem. Thanks for any hint! Walter _______________________________________________
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