# "Connection Refused" on TCP port when Digi ONE SP received data on serial port.

**URL:** <https://forums.digi.com/t/connection-refused-on-tcp-port-when-digi-one-sp-received-data-on-serial-port/7454>\
**Category:** Digi One IA/IAP\
**Created:** [November 9, 2010, 3:48pm UTC](https://forums.digi.com/t/connection-refused-on-tcp-port-when-digi-one-sp-received-data-on-serial-port/7454 "2010-11-09T15:48:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![myrdhin](https://avatars.discourse-cdn.com/v4/letter/m/e274bd/32.png) [@myrdhin](https://forums.digi.com/u/myrdhin)\
**Post date:** [November 9, 2010, 3:48pm UTC](https://forums.digi.com/t/connection-refused-on-tcp-port-when-digi-one-sp-received-data-on-serial-port/7454/1 "2010-11-09T15:48:51Z")

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Hello,

I made a program under Linux that makes a connection on the TCP port 2101 of my DIGI ONE SP, to receive data from sensors.

All works well, except that when the digi is receiving data on serial port, my connection is refused by the DIGI …

When DIGI is not receiving serial data, I can connect, and then I received data, as expected.

Is there someone that experimented this type of behavior ?  
Is there a solution to get a connect even if tha digi is receiving serial data ?

Thanks for any help.

Below is my digi configuration :

# Digi One SP Version 82000774\_U2 02/25/2009

set config dhcp=off  
set config myname=“” domain=“”  
set config ip=192.168.1.31 submask=255.255.255.0  
set config gateway=192.168.1.1  
set config realport=771 sockets=2000 redirect=ignore tbreak=std  
set config optimize=throughput  
set keys prevcmd=^P nextcmd=^N forwchar=^F backchar=^B  
set config boothost=0.0.0.0 bootfile=“” tftpboot=no  
set config pmtelnet=off  
set config rpexclusive=off  
set config rpkeepalives=on  
set config cache\_dns=on  
set ethernet speed=auto duplex=half  
set config rarp=on  
set config ping-arp=on  
set web timeout=300  
set profile range=1 profile=custom  
set line range=1 parity=N csize=8 error=ignore  
set line range=1 baud=115200 stopb=1 break=ignore inpck=off istrip=off onlcr=off otab=off  
set flow range=1 ixon=off aixon=off ixoff=off ixany=off itoss=off altpin=off forcedcd=off  
set flow range=1 dtr=off cts=off dcd=off dsr=off  
set flow range=1 ri=off  
set flow range=1 pre-delay=0 post-delay=0  
set flow range=1 rts=off

set keys range=1 xon=^Q xoff=^S xona=^Q xoffa=^S lnext=^V

set port range=1 dev=prn sess=4 termtype=“vt100” edelay=1 auto=off bin=off  
set port range=1 uid=none group=none dport=none  
set port range=1 dest=none  
set port range=1 scriptname=none  
set port range=1 keepalive=off flushstchar=default autoservice=default  
set port range=1 autodrain=off  
set port range=1 idletime=0

set socketid range=1 state=off string=“SOCKETID”  
set udpserial range=1 rmax=82 rtime=0 closetime=0 overflow=forward strip=off  
set udpserial range=1 delimiters=  
noreply=off  
set udpdest port=1 range=1 ipaddr=192.168.1.152 ipport=2101 description=“dest1”  
set secureaccess telnet=on  
set secureaccess http=on  
set secureaccess rlogin=on  
set secureaccess rsh=on  
set secureaccess realport=on  
set secureaccess reversetcp=on  
set secureaccess reversetelnet=on  
set secureaccess lpd=on  
set secureaccess addp=on

set logport ra=1 state=off  
set logport ra=1 mode=syslog  
set logport ra=1 udpport=514  
set logport ra=1 rmax=1024  
set logport ra=1 rtime=100  
set logport ra=1 pri=134  
set logport ra=1 strip=off  
set logport ra=1 delim=“”  
set sharing range=1 clients=1 control=shared timeout=0 wrpolicy=all

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<div class="post-metadata">

**Author:** ![userid0](https://avatars.discourse-cdn.com/v4/letter/u/f6c823/32.png) [@userid0](https://forums.digi.com/u/userid0)\
**Post date:** [November 9, 2010, 6:20pm UTC](https://forums.digi.com/t/connection-refused-on-tcp-port-when-digi-one-sp-received-data-on-serial-port/7454/2 "2010-11-09T18:20:46Z")

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Have you tried enabling port sharing to allow more than one connection simultaneously?