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MTK models #1
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I don't have a MTK3336 to test with but I think it'll work. |
hello again :) I ended up buying the Adafruit ultimate GPS with the MT3339 chipset. But i'm having a problem actually getting the AGPS to work. Even when I send EPO, position and time to the chipset, I can't get a fix with the built in antenna and indoors. When I use an external antenna and put it outside I get a fix almost instantly even without sending the EPO,position,time data. Do you have any idea why this would happen ? Also, when the module loses power (i.e. when I restart the BeaglBone), does it restart in factory reset mode or cold/warm/hot start ? Thank you very much |
Hi there, To answer your question regarding why it didn't work indoors without an antenna: Why your GPS unit found a fix almost immediately outdoors: Answer to your power loss question: |
The other factor to consider is time. The EPO data is completely useless if the unit doesn't have the correct time. Outside, it can get the time well before it gets a fix. In fact, it has to have the time BEFORE it can get a fix. It sounds like inside it's not even getting the time so a fix will be impossible. BTW, not only does the battery preserve settings, it also keeps the internal RTC working so even if you disconnect power, the unit will have accurate time immediately on main power up. Use the gpsstatus tool while indoors to see if the unit has good time and what kind of signal you're seeing. |
Thank you very much for this information !! :) the gpsstatus tool was really helpful in comparing TTFF between different conditions. |
Hello,
I was wondering if the library works with other MediaTek chipsets like the MTK3336 ?
Thank you,
Fouad
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