Telit GL865 Status monitoring


+ Reply to Thread
Results 1 to 3 of 3
  1. #1
    Join Date
    Jul 2003
    Location
    Lancashire
    Posts
    50

    Default Telit GL865 Status monitoring

    Hi All

    I'm running a GL865 and it would be useful to know the network registration status by monitoring the status LED. When the module is not registered the status pin is low for around 1 second then high for around 0.5 seconds. When registered the pin is low for around 3 seconds and high for around 0.3 seconds. Any suggestions as to the best way to determine if the pin remains low for say 1.5 seconds. I'm working on the fact that if it is low for that period it must be in a registered state, there's no need to time to 3 seconds so long as the period exceeds the unregistered value.
    Cheers Pete

  2. #2
    Join Date
    Oct 2005
    Location
    Sweden
    Posts
    3,361

    Default Re: Telit GL865 Status monitoring

    As usual there are many ways and as usual it depends on what other things your program is doing and what hardware resources you have available - in the PIC and outside.

    When not registred the dutycycle of the signal is ~33% and when registred it's ~10%.
    Run it thru a low pass filter and sample it with the ADC or use a comparator. Yes, the frequency is really low so you'll need a "large" filter but so what. It's not going to jump on and off the network several times per minute (hopefully).

    Or, if your mainloop is somewhat constant in its execution time then simply poll the input every iteration and work out the time.

    With that said, doesn't it have some kind of statusregister, with a bit indiciating network status, that you can read?

    /Henrik.

  3. #3
    Join Date
    Jul 2003
    Location
    Lancashire
    Posts
    50

    Default Re: Telit GL865 Status monitoring

    Hi Henrik
    Yes there is an AT command but its not that consistent. I`m looking at monitoring this from the main look, unfortunately I`ve already got the hardware so I cant easily add in the integrator components. I loop every 1 second so I`ll try polling and see what I get.
    Cheers Pete

Similar Threads

  1. Interrupt status?
    By circuitpro in forum mel PIC BASIC Pro
    Replies: 11
    Last Post: - 28th February 2011, 01:27
  2. How can I store the status of a pin?
    By Stargazer3141 in forum General
    Replies: 2
    Last Post: - 3rd December 2010, 22:59
  3. Module GSM Telit GM862
    By volcane in forum mel PIC BASIC Pro
    Replies: 2
    Last Post: - 3rd November 2007, 10:51
  4. STATUS re-curtain W
    By zugvogel1 in forum mel PIC BASIC Pro
    Replies: 5
    Last Post: - 13th February 2005, 15:21

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts