# RCM6700: Seeing HTTP: TIMEOUT! from http.lib, unsure why

**URL:** <https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053>\
**Category:** Rabbit Software\
**Tags:** http\
**Created:** [January 24, 2018, 2:10pm UTC](https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053 "2018-01-24T14:10:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![shill](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@shill](https://forums.digi.com/u/shill)\
**Post date:** [January 24, 2018, 2:10pm UTC](https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053/1 "2018-01-24T14:10:12Z")

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I have a reference RCM6700 board and running a web server, since adding authentication to the page the client looks to hang but if left long enough it loads.

This is an intermittent issue, it doesn’t always hang.

I enabled HTTP\_VERBOSE and see the below snippet, sometimes it times out multiple times, sometimes not at all.

I’ve tried increasing HTTP\_MAXBUFFER up to 2048.

Can anyone offer any help? Could it be something I’m not setting that is causing the issue or setting incorrectly?

verbose output:  
HTTP: digest; resource=/netconfig.shtml realm=User  
----HTTP: getline: ‘’  
HTTP: state changed to 4-\>6  
HTTP: sending 401 for /netconfig.shtml, realm User  
HTTP: state changed to 6-\>10  
HTTP: state changed to 10-\>11  
HTTP: state changed to 11-\>9  
HTTP: socket ended in state 9  
HTTP: state changed to 9-\>2  
HTTP: socket established  
HTTP: state changed to 2-\>3  
HTTP: TIMEOUT!   
HTTP: socket ended in state 9  
HTTP: state changed to 3-\>2  
HTTP: socket established  
HTTP: state changed to 2-\>3  
----HTTP: getline: ‘GET /netconfig.shtml HTTP/1.1’

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**Author:** ![TomCollins](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/tomcollins/32/37_2.png) [@TomCollins](https://forums.digi.com/u/TomCollins)\
**Post date:** [January 25, 2018, 6:31pm UTC](https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053/2 "2018-01-25T18:31:32Z")

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Looks like the timeout happened in HTTP\_GETREQ (state 3) and it wasn’t able to read a line. Can you use a packet sniffer (Wireshark) on the PC sending the request to see what the headers look like? Maybe increasing HTTP\_MAXSERVERS would help?

Can you try one of the sample programs with authentication to see if that works? If not, reply with steps to reproduce the failure and I can investigate it.

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**Author:** ![shill](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@shill](https://forums.digi.com/u/shill)\
**Post date:** [February 5, 2018, 10:43am UTC](https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053/3 "2018-02-05T10:43:29Z")

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Samples programmes were all fine.

Changing HTTP\_MAXSERVERS to 8 resolved this issue, I had it set to 4 previously. Is 8 ok?

My application is monitoring/setting GPIO with web and rs232 interface to enable this, setting to 8 didn’t give any noticeable error or issue.

Thanks.

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<div class="post-metadata">

**Author:** ![TomCollins](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/tomcollins/32/37_2.png) [@TomCollins](https://forums.digi.com/u/TomCollins)\
**Post date:** [February 6, 2018, 12:24pm UTC](https://forums.digi.com/t/rcm6700-seeing-http-timeout-from-http-lib-unsure-why/19053/4 "2018-02-06T12:24:45Z")

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Yes, that’s OK. Web browsers like to make multiple simultaneous requests, so increasing HTTP\_MAXSERVERS to support that is a good idea (at the cost of using some additional RAM). You can always view the MAP file from a build to see how much space your code, constants and variables use.