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  • December 14, 2014 at 7:55 pm in reply to: Client side charts #939
    vinz
    Member

    thank you Peter,
    hope we get this up for uradmonitor.


    @Hexide     I also tested several frameworks when I needed it some time ago. Highcharts is easy and quick, best for quick private projects. But maybe there are better solutions up now?
    We have to play around, that needs some time.

    Who has more samples? What would be nice? Ideas, we need ideas. 🙂
    Vinz

    December 14, 2014 at 3:34 pm in reply to: Client side charts #932
    vinz
    Member

    delivery: http://www.vegasoft.de/urad/
    yust a test, your feedback is welcome

    Vinz

    December 13, 2014 at 12:05 am in reply to: Networking Issues #900
    vinz
    Member

    that’s a good idea. Have to look for a better doc.

    What I wanted to say, viewing the code will not help, as long as we don’t know what we are looking for.
    I’d assume problems with the device-name, but don’t see it. 😉

    December 12, 2014 at 11:12 pm in reply to: Networking Issues #898
    vinz
    Member

    ok, but what is wrong in this packages? wireshark is very unspecific …
    We have to learn more about the contents of this packages, I think.

    December 11, 2014 at 9:26 pm in reply to: Networking Issues #869
    vinz
    Member

    here you see the full communication after boot.

    Different length seems to be normal because of the device-name.
    device-name is the last piece, is it inserted correctly?

    P.S: @Radu did you see the transaction-ID in your screenshot, seems you have a musical talented device there. La lla laa La. (or drunk)

    Attachments:

    1. dhcp_malformed2.jpg

    December 11, 2014 at 9:14 pm in reply to: Networking Issues #868
    vinz
    Member

    Hmm, I see the same packet length and the DHCP-request is also marked as malformed by Wireshark, but I do not have connection-issues.
    soo…

    And this makes it strange: to get inconsistent behaviour depending on the network!

    The DHCP Request is not the first packet.
    1) First there is a DHCP Discover sent by the uRAD, with no IP, just the MAC.
    2) Then the DHCP Server Offers an IP
    3) The uRAD Requests this IP with no own IP
    4) The Server ACKs this.

    So, when you see different behaviour in different networks, maybe there are differences in 2) ?
    Do you have both, working and not working with uRAD Device? Could you analyse that?

    Vinz

    December 11, 2014 at 8:23 pm in reply to: [Solved] Unit won’t connect from 4G network #857
    vinz
    Member

    Hello,

    @Radhoo, could you comment this, maybee there were updates this time?
    Is it correct you have two IPs, for data. and main domain?


    @Lars    , do you have a selfmade firewall which hacks packets out? 🙂

    Vinz

    December 11, 2014 at 8:08 pm in reply to: Networking Issues #855
    vinz
    Member

    you’re right Andromedan, I can copy that.
    We have to check the DHCP Lib in the device…

    There are other things I’d like to check this for too: I don’t think it will handle “round robin DNS” correctly.

    Vinz

    P.S: nice, I saw this “suspicious” MAC too, hoped It will not make problems.
    Can we find out more? Are there MAC-ranges blacklisted, or others whitelisted or other techniques to find repdigit MACs?

    Attachments:

    1. dhcp_malformed.jpg

    December 11, 2014 at 8:06 pm in reply to: Client side charts #854
    vinz
    Member

    yes, I’ve set up a quick highcharts test for my sensor.
    It’s shows real data.

    At the moment et shows 10min averages of the last 24h.
    If I find some time this weekend, I update it so you can enter a time-range and can zoom from 1 year (day averages) down to the single records (minutes).

    Link is: http://www.vegasoft.de/urad/

    Vinz

    December 11, 2014 at 8:01 pm in reply to: more than one central-server? #853
    vinz
    Member

    uh, I wrote an answer 2 days ago, it’s gone.

    This sounds logic, it’s very nice! 🙂
    I’d like to test this in a local environment.

    Data stored this way can easily brought together manually.
    But did you do it automatically? How did you do this setup (replication both sides).

    Vinz

    December 9, 2014 at 7:41 pm in reply to: more than one central-server? #816
    vinz
    Member

    So slaves will take over
    1st via the DNS-entry you described
    2nd via a new backup url, stored in the device

    just to store their data. This data have then to be brought together manually.
    Hm..

    But please consider/keep in mind: Devices will not leave the secondary-server anymore, once the choosed it. (as long as it’s online, and normally it will be).

    PS: I’m reading:
    http://www.percona.com/doc/percona-toolkit/2.1/pt-table-sync.html

    December 9, 2014 at 7:34 pm in reply to: opening Development section? #815
    vinz
    Member

    Now you’re very open-handed with our basic thoughts 🙂

    more than one central-server?

    What do others think?

    December 9, 2014 at 7:22 pm in reply to: Security: invalid data injection #809
    vinz
    Member

    Hello Hexide,
    You’re right; I also proposed this “shared secret” used for hashing (see link automated-device-ids).

    so I missed

    • Devices upload interval is unusual
    • Devices timestamp-value is dubious

    Does someone have other (maybe mathematical) ideas, to detect suspicious data?

    By the way
    you also can LIMIT the number of queries in MySQL.

    Maybe one MySQL-user per device is too much but user-groups for special urad und DIY-devices may be good. (See: http://dev.mysql.com/doc/refman/5.0/en/user-resources.html).

    So one group can’t totally overload the server, and others can still store data.

    Example: You could now use one new user for online requests (SELECT) only.
    If you limit this user, the database will always be able to store new data.
    Vinz

    December 9, 2014 at 6:44 pm in reply to: more than one central-server? #800
    vinz
    Member

    Hello Hexide,

    that’s a good point, didn’t think about that. We should do that.

    It will help, if main-server is down (hardware, os, ..).
    1) but it will not help, if DNS-entry is taken.
    2) and we’d have to check, if the devices DNS-client can handle this at the moment. Maybe I could check that offline.

    Also we then/still have the problem of syncing several (in this case) MySQL-master-databases.
    I only know about syncing from one master’DB to several client’DBs. There data is written to one DB only – and users read (requests…) from the client’DBs where a minimum mismatch doesn’t matter (not the newest data available).

    In our new scenario we’d need to synchronic several master’DBs, which are all written

    Is this possible with MySQL? What about the conflicting primary-keys?

    Vinz

    P.S: The correct words to search are “replication” and “master-master-replication”.

    December 8, 2014 at 9:37 am in reply to: Automated Dynamic ID allocation #728
    vinz
    Member

    Scenario (just a thought):

    1) the device is soldered an programmed (all the same)
    2) the device is set online while testing/calibrating at urad-laboratories
    2a) it atomatically pulls its new ID and secret from a database.
    3) it appears in an (online or local) website as beeing new (devices without eMail)
    4) one has to enter customers eMail
    5) device-id, login-data, and all wellcome-info are sent to customer automatically

    (when user logs into his device on uradmonitor.com he may also need to see its local IP and a link, but that is some kinde of private information… )

    • This reply was modified 9 years, 5 months ago by vinz.
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