Q&A

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No. 1270	Re: TCP connection loss	2014-03-10

Hello This is Andy Lee with Support Team. I'd like to want you to check if the IP address of your tablet is changed after 12 hours. (if it is) There is a high possibility of the bug related to DHCP Server function of CSW-M85. The lease time of CSW-M85 DHCP Server is the 1 Day(24 hours). And DHCP client(in this situation your tablet) tries to extend its lease after a half of the lease time. But CSW-M85 may NOT reply to the request of the renewing. Most of DHCP clients don't expire its lease until its original lease time, even though there is no reply of the renewing request from DHCP server. That's why I mentioned the checking of the IP address of your tablet after 12 hours. And here is the BETA firmware which is fixed this bug. I hope this firmware is resolve your problem. Thank you. > JMB wrote: > ------------------------------------ > Hi, > I use a CSW-M85 module in soft AP mode, TCP server. In my application a tablet (client) receives data from a microprocessor connected to the CSW module (serial). Always after a time around 12 hours, the TCP connection is broken.Is there a timeout in the CSW-M85 module that breakes the TCP communication ? > > Best Regards > > JMB >