|Subject:||Re: [Paparazzi-devel] Paparazzi Stand Alone GPS also known as GPS13 not working|
|Date:||Thu, 22 Jan 2015 18:02:21 -0500|
This is interesting then. The u-blox module is 3.3v logic. The GPS13
has a 5v -> 3.3v reg on it to drop the voltage down if it's fed 5v
from on the 5v pin. So getting 5v on any of the module pins is, well,
The wiring is gnd, 3.3v (usually not connected), rx, tx, open, open,
open, 5v .. this is by memory so maybe tx/rx are in reality reversed.
Just the important point is 5v and gnd are on opposite ends of the
connector. Are you sure you are not feeding it 5v on the 3.3v line? If
not I'm at a loss why you get 5v on a Tx pin.
On 1/20/15, Joseph Muhlhausen <address@hidden> wrote:
> Hi David,
> Good to know that you can make new boards if needed. For the time being I
> have ordered a ublox neo m8n.
> I still want to find out what went wrong to prevent from happening again.
> -It looks like I get 5v on the TX and 3.3V on the RX line. Is this normal?
> -Also no current is drawn from the module
> The gps module didn't seem to help unfortunately.
>> On Jan 14, 2015, at 4:48 PM, David Conger <address@hidden> wrote:
>> I see, well, yes, I am still away on a long overdue break. Honestly if
>> someone really needed some boards made I could work with a supplier to
>> get them assembled. It would just mean they add their markup to the
>> whole lot but I would be glad to help someone get what they needed
>> even while I'm away.
>> Yes, the old designs are still relevant and there is no reason that
>> board should just stop working other than I have seen them revert to
>> 9600bps and the standard settings before. Charging the cap won't reset
>> the paparazzi settings back into it which is why I suggested using the
>> module in your airframe file. Even with no cap or a depleted cap it
>> should power up and work.
>> Have you used the tunnel before? Which autopilot do you have? I'lll
>> walk you through it if you like or call me I'll send you my phone
>> number and I can walk you through it. I just am not sure if you've
>> done it before so I don't want to assume your level of experience with
>> these things. The "Tunnel" is invaluable to me. That's still what I
>> do after all these years to test GPS after assembly.
>> If the instructions online are unclear let me know I've done it a
>> million times. I just don't have the computer I used in front of me
>>> On 1/14/15, Joseph Muhlhausen <address@hidden> wrote:
>>> Hi David,
>>> Yes I believe you made that board and since you are on leave no one is
>>> making it anymore ...
>>> I have left the GPS aside for a couple of months and it may well be, as
>>> mentioned, an empty capacitor.
>>> I will power the GPS for half a day and see if it helps. I will also try
>>> the module. So far I have had no luck with u-center via FTDI.
>>> On Tue, Jan 13, 2015 at 4:34 PM, onefastdaddy <address@hidden>
>>>> I probably made that board. :)
>>>> First thing that comes to mind is the small cap drained completely. A
>>>> good Engineer friend told me that cap takes a long time to charge.
>>>> Possibly the module reset to the factory defaults (9600bps). Have you
>>>> Loading the "tunnel" program into the autopilot and using u-center?
>>>> Quick test could be just set the bps to 9600 for the gps in the
>>>> file or set the u_center module up. Let me dig in the Wiki for that...I
>>>> think this is the page:
>>>> http://wiki.paparazziuav.org/wiki/Airframe_Configuration <-- look for
>>>> the page
>>>> The gps module will let you setup the GPS again from the autopilot.
>>>> I'm not completely sure the exact way it works but what I do is in GCS
>>>> launching it go into settings and find the gps module and check the box
>>>> upload (green checkbox)...this enables the module which seems to do the
>>>> magic required. The module is really for GPS boards without a .2F cap
>>>> lose their minds after power down. But in this case give it a go.
>>>> The good news is likely all is fine. One thing I've learned after all
>>>> years (8 now) of assembling Paparazzi things, and using them myself,
>>>> are durable and actually quite hard to kill. Non Paparazzi designed
>>>> from 3rd parties are not so durable IMHO and experience.
>>>> Let me know if that sorts it out...
>>>> View this message in context:
>>>> Sent from the paparazzi-devel mailing list archive at Nabble.com.
>>>> Paparazzi-devel mailing list
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