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by usman1644
Wed Mar 27, 2019 10:28 am
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

If you don't have a single broadcast domain you don't have one network, you have many. Even if they are numbered/named/whatever the same. If you need to create a federation of machines without central authority, you need a mesh network protocol. The machines will talk with each other ("I can r...
by usman1644
Tue Mar 26, 2019 1:15 pm
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

@ epoch1970 All clients cannot access directly to server. However ad-hoc network is the same. Let suppose i have 3 nodes n1,n2 and n3. n2 and n3 is sending data to n1(server) n1 = Server n2 and n3= Client here n2 can access directly to n1 but n3 cannot access directly to n1. n3 will send his own dat...
by usman1644
Tue Mar 26, 2019 12:26 pm
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

By reference to this file list, ntp-keygen should have been installed as part of the ntp package installation: https://packages.debian.org/stretch/armhf/ntp/filelist Can you confirm that this package is installed? Does the output of apt-cache policy ntp verify that? @ DougieLawson @ B.Goode I am us...
by usman1644
Tue Mar 26, 2019 11:26 am
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

The first is an IPv6 definition for the subnet (I've masked some bits as I don't want to publish my globally unique addresses) the second is the explicit IPv6 address for my master time server. If you're not using IPv6 just delete those lines. @ DougieLawson below error is not resolved yet "ba...
by usman1644
Tue Mar 26, 2019 6:11 am
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

@DougieLawson In master file restrict -6 2002:xxxx:xxxx:xxxx:: mask fffff:fffff:fffff:ffff:: in Slave file server 2002:xxxx:xxxx:xxxx:ba27:ebff:febe:beef Can you please explain a little bit why both should be different? I am using ad-hoc connection, in which I can see the 'Ip_address(192.168.50.14),...
by usman1644
Mon Mar 25, 2019 7:40 pm
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

Re: How to synchronized the clock of multihop network raspberries

@DougieLawson

Yes I am using same subnet and broadcast address (e.g. 255.255.255.0 and broadcast: 192.168.50.254)
by usman1644
Mon Mar 25, 2019 4:19 pm
Forum: General discussion
Topic: How to synchronized the clock of multihop network raspberries
Replies: 15
Views: 1070

How to synchronized the clock of multihop network raspberries

Hi I have developed a multihop wireless network. In my network, one raspberry is working as a sink and other 6 raspberries as a sensor node. All sensor nodes raspberries sends data to sink through multihop. I want to synchronize the clock of all raspberries. Can anybody help me to synchronize the cl...
by usman1644
Tue Jul 17, 2018 4:53 pm
Forum: General discussion
Topic: How to change the core file size of raspberry pi3
Replies: 16
Views: 2641

Re: How to change the core file size of raspberry pi3

I have posted my code here in comments. Please see and guide me how i can fix the issue.... however with the "Too many open files" error what are you doing to create this i.e. are you opening loads of files and not closing them ? when does this occur ? etc... Can you see below my posted qu...
by usman1644
Tue Jul 17, 2018 4:44 pm
Forum: General discussion
Topic: How to change the core file size of raspberry pi3
Replies: 16
Views: 2641

Re: How to change the core file size of raspberry pi3

DirkS wrote:
Tue Jul 17, 2018 1:13 pm
usman1644 wrote:
Tue Jul 17, 2018 12:07 pm
Can you see below my posted query on stackoverflow.com
File “/usr/lib/python3.5/socket.py”, line 134, in __init__ OSError: [Errno 24] Too many open files
Had a quick look around, but cannot find it...
My code is here in comments. Please see and give some solution how i can fix my issue ?
by usman1644
Tue Jul 17, 2018 12:07 pm
Forum: General discussion
Topic: How to change the core file size of raspberry pi3
Replies: 16
Views: 2641

Re: How to change the core file size of raspberry pi3

however with the "Too many open files" error what are you doing to create this i.e. are you opening loads of files and not closing them ? when does this occur ? etc... Can you see below my posted query on stackoverflow.com File “/usr/lib/python3.5/socket.py”, line 134, in __init__ OSError...
by usman1644
Mon Jul 16, 2018 11:05 pm
Forum: General discussion
Topic: How to change the core file size of raspberry pi3
Replies: 16
Views: 2641

How to change the core file size of raspberry pi3

i am using raspberry Pi3. I am getting error "OSERROR: [ERRNO 24] Too many open files" . To fix this problem, i want to change the core file size. I am trying to change "/etc/security/limits.conf" this file but this file does not contain below lines. Below lines got by "ulim...
by usman1644
Sun May 13, 2018 11:38 am
Forum: Troubleshooting
Topic: eth0 link is down
Replies: 4
Views: 36605

eth0 link is down

Hello to everybody

I am using Raspberry Pi 3. My raspberry pi 3 eth0 link is down.
Can anybody tell me how I can activate my raspberry eth0?
Which command can I use for activating the eth0 activation?





Best Regards
Usman

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